Category: Severe Weather Alert

Weather Alert – Damaging Winds

The Cape Town Weather Office has issued the following severe weather alert:

Hazard: Damaging Winds

Alert Level: Advisory

Valid From (SAST): 12/09/19 00h00

Valid To (SAST):  12/09/19 00h00

Strong north-westerly winds (50-60km/h) are expected over the Central Karoo and the Breede River. Gale force westerly wind (65-70km/h) is expected between Cape Agulhas and Plettenberg Bay on Thursday.

DESCRIPTION: STRONG DAMAGING WINDS

Strong damaging winds often occur along coastal regions, but also often occur during thunderstorm activity. These winds are sudden and can cause much damage.

PRECAUTIONS: STRONG DAMAGING WINDS

Stay indoors where possible away from the windows that open towards the severe winds. Be aware of the following: – sudden cross winds if traveling especially between buildings, fallen trees or power lines and flying debris.

Small boats must stay away from the open sea and seek the shelter of a harbour, river estuary or protected bay.

Parked aircraft should be pointed into the direction of the wind and secured Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

Report any related incidents to the  Garden Route DM Disaster Management Centre at telephone number. 044-805 5071.

Severe Weather Alert

The Cape Town Weather Office has issued the following severe weather alert.  WARNING: damaging winds over the interior of the Garden Route District Municipality for later today.

HAZARD: Damaging winds
ALERT LEVEL: Warning
VALID FROM (SAST): 07/08/19 – 10h00
VALID TO (SAST): 07/08/19 – 20h00

WARNING:  A strong W/NW’ly gale force wind (70-80km/h) is expected between Cape Point and Cape Agulhas this afternoon (Wednesday), subsiding by evening.

ADVISORY: Strong north-westerly to westerly winds (50-60km/h) are expected over the Breede River Valley, Central Karoo, and the interior regions of the Garden Route District of the Western Cape today (Wednesday).

Description: Strong damaging winds
Strong damaging winds often occur along coastal regions, but also often occur during thunderstorm activity. These winds are sudden and can cause much damage.

Precautions:  Strong damaging winds
Stay indoors where possible away from the windows that open towards the severe winds. Be aware of the following: – sudden cross winds if traveling especially between buildings, fallen trees or power lines and flying debris.
Small boats must stay away from the open sea and seek the shelter of a harbour, river estuary or protected bay.
Parked aircraft should be pointed into the direction of the wind and secured. Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

Description: Dangerous veld/bush fire conditions

Whenever there are prolonged periods of little and no rain coupled with warm dry winds, veldt or bush fires can easily be sparked and will spread rapidly in strong winds.

Don’t make fires in the open and/or leave fires unattended. Don’t throw cigarette butts out of cars or in the open veldt. Don’t throw bottles in the veldt as they can magnify the sun’s rays and start fires. Prepare and maintain fire breaks in controlled manner. In the case of a large fire report it immediately and move away from the area to let the professionals deal with it. Never throw water onto a fire started by an electrical fault or fires started by oil or paraffin lamps. In this case sand or a blanket should be used to smother the fire. Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

Report any related incidents to the Garden Route DM Disaster Management Centre at Tel: 044-805 5071.

Severe Weather Alert

The Cape Town Weather Office has issued the following severe weather alert:

HAZARD: Veld Fire Conditions
ALERT LEVEL: Warning
VALID FROM (SAST): 07/08/19 – 10h00
VALID TO (SAST): 07/08/19 – 20h00

Expected over Central and Karoo and Hessequa municipality of the Garden Route District tomorrow (Wednesday).

Description: Strong damaging winds
Strong damaging winds often occur along coastal regions, but also often occur during thunderstorm activity. These winds are sudden and can cause much damage.

Precautions:  Strong damaging winds
Stay indoors where possible away from the windows that open towards the severe winds. Be aware of the following: – sudden cross winds if traveling especially between buildings, fallen trees or power lines and flying debris.

Small boats must stay away from the open sea and seek the shelter of a harbour, river estuary or protected bay.
Parked aircraft should be pointed into the direction of the wind and secured.  Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

Description: Dangerous veld/bush fire conditions

Whenever there are prolonged periods of little and no rain coupled with warm dry winds, veldt or bush fires can easily be sparked and will spread rapidly in strong winds.

Precautions: Dangerous veld/bush fire conditions

Don’t make fires in the open and/or leave fires unattended. Don’t throw cigarette butts out of cars or in the open veldt. Don’t throw bottles in the veldt as they can magnify the sun’s rays and start fires. Prepare and maintain fire breaks in controlled manner. In the case of a large fire report it immediately and move away from the area to let the professionals deal with it. Never throw water onto a fire started by an electrical fault or fires started by oil or paraffin lamps. In this case sand or a blanket should be used to smother the fire. Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

The Cape Town Weather Office has issued the following warnings:

Issued: 28/07/2019 @ 12:44

WARNING #1

ALERT LEVEL:  Level 4 Yellow Warning for wind

Valid from: (SAST) 30/07/2019 – 20:00

Valid to: (SAST) 30/07/2019 – 00:00

Affected DM / LM / Metro / area

City of Cape Town, Drakenstein (LM), Stellenbosch (LM), Breede Valley (LM), Langeberg
(LM),Laingsburg (LM), Beaufort West (LM), Theewaterskloof (LM), Overstrand (LM),
Swellendam (LM), Cape Agulhas (LM) and Hessequa (LM).

DESCRIPTION:  There is a Low likelihood of Significant impacts to occur over
over the Cape Metropole, Cape Winelands, Overberg and Central Karoo from Monday
afternoon from early Tuesday morning through to the evening due to WIND.

A cold front affecting the Western Cape will result in strong to gale force and
gusty north-westerly winds over the interior of the Western Cape throughout
Tuesday. Wind speeds are expected to reach 60-70km/h with gusts up
to 80-90km/h. These north-westerly winds will act as a crosswind to the N1, N2
and N7 highways and associated major railways. Winds moderate by Tuesday
night.

Strong to Gale force and gusty crosswinds along the N1, N2 and N7 highways
may result in these major routes as well as corresponding rail transport being
affected. Dangerous driving conditions may lead to road accidents along this
route. High-sided vehicles are at risk of being toppled by intense wind gusts
along the route.These strong winds along with dry and warm conditions may
cause run-away veldfires over the Central Karoo and Eden District on Monday.
Damage to formal and informal settlements and possible visibility reduction due
to dust storms.

WARNING #2

Alert level: Level 4 Yellow Warning for Wind  (Coast)

Valid from: (SAST) 29/07/2019 – 20:00

Valid to: (SAST) 30/07/2019 – 17:00

Affected coastal area (up to 15nm)

Coastal areas between Cape Agulhas and Plettenberg Bay.

DESCRIPTION:  There is a Low likelihood of Significant impacts to occur
along the coast between Cape Agulhas and Plettenberg Bay due to WIND.

A cold front is expected to move over the south-western parts of the Western
Cape Monday night through Tuesday, with the potential to cause gale force
north-westerly winds (35-40kt) Monday night between Cape Columbine and
Capre Agulhas spreading to the offshore areas of the south coast (Plettenberg
Bay) during Tuesday afternoon while turning westerly.

Weather conditions will cause difficulty in navigation out at seas due to strong
winds, small vessels may be at risk of taking on water and capsizing. Some
disruption to operations for small harbours and ports are possible.

WARNING #4

Alert level:  Level 2 Yellow Warning for Waves

Valid from: (SAST) 30/07/2019 – 00:00

Valid to: (SAST) 31/07/2019 – 08:00

Affected coastal area (up to 15nm)

Coastal areas between Lamberts Bay and Plettenberg Bay.

DESCRIPTION:  There is a High likelihood of Minor impacts to occur
along the Western Cape west and south-west coast early on Tuesday morning,
spreading to Plettenberg Bay during the afternoon due to high WAVES.

Intense cold front passing over the Cape late Monday night and through to
Tuesday, generating high wave conditions along the west and south-west coast
early Tuesday morning. Waves heights of 6-7m are expected with a westerly
component.  These waves will spread along the south coast during the afternoon however
remaining further off-shore. Swell direction swings to south-westerly late
Tuesday.

Difficulty in navigation along the entire coastline is likely and may lead to small
vessels taking on water and/or capsizing. This will be enhanced with the strong
winds that are also expected. Localised damage to infrastructure iis possible
and mainly for the west and south-west coast. Localised disruption to
beachfront activities are also likely.

Severe Weather Alert

The Cape Town Weather Office has issued the following severe weather alert:

HAZARD: Damaging Winds
Alert Level: Warning
Valid From (SAST): 01/07/2019 – 11h00
Valid To (SAST): 02/07/2019 – 21h00

Gale force westerly to south-westerly winds (65-70km/h) are expected along the coastal areas between Knysna and Plettenberg Bay this afternoon (Monday). Gale force north-westerly winds (65-75km/h) are expected along the coastal areas between Cape Point and Cape Agulhas from early tomorrow morning (Tuesday), moderating the evening.

Description: Strong damaging winds
Strong damaging winds often occur along coastal regions, but also often occur during thunderstorm activity. These winds are sudden and can cause much damage.

Precautions:  Strong damaging winds
Stay indoors where possible away from the windows that open towards the severe winds. Be aware of the following: – sudden cross winds if traveling especially between buildings, fallen trees or power lines and flying debris.
Small boats must stay away from the open sea and seek shelter of a harbour, river estuary or protected bay.
Parked aircraft should be pointed into the direction of the wind and secured. Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

Report any incidents to the Garden Route District Municipality Disaster Management Centre at: 044-805 5071.

 

Severe Weather Alert

A Severe Weather Alert was issued by the Cape Town Weather Office as follows:

Hazard: Damaging Winds

Alert Level: Warning
Valid From (SAST): 05/06/19 – 00h00
Valid To (SAST): 05/06/19 – 19h00

Warning: Gale force westerly to south-westerly winds (60-75km/h gusting 80-90km/h) are expected along the coastal regions between Cape Point and Plettenberg Bay tomorrow early morning (Wednesday), subsiding early evening.

Advisory: Strong westerly to north-westerly winds (50-65km/h) are expected over the Central Karoo and the Breede Valley (Western Cape) tomorrow early morning, subsiding by evening.

Description: Strong damaging winds
Strong damaging winds often occur along coastal regions, but also often occur during thunderstorm activity. These winds are sudden and can cause much damage.

Precautions:  Strong damaging winds
Stay indoors where possible away from the windows that open towards the severe winds. Be aware of the following: – sudden cross winds if traveling especially between buildings, fallen trees or power lines and flying debris.
Small boats must stay away from the open sea and seek the shelter of a harbour, river estuary or protected bay.
Parked aircraft should be pointed into the direction of the wind and secured.  Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

Description: Dangerous veld/bush fire conditions

Whenever there are prolonged periods of little and no rain coupled with warm dry winds, veldt or bush fires can easily be sparked and will spread rapidly in strong winds.

Precautions: Dangerous veld/bush fire conditions

Don’t make fires in the open and/or leave fires unattended. Don’t throw cigarette butts out of cars or in the open veldt. Don’t throw bottles in the veldt as they can magnify the sun’s rays and start fires. Prepare and maintain fire breaks in controlled manner. In the case of a large fire report it immediately and move away from the area to let the professionals deal with it. Never throw water onto a fire started by an electrical fault or fires started by oil or paraffin lamps. In this case, sand or a blanket should be used to smother the fire. Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

Description: Storm surges / High Seas

Generally heavy seas or damaging waves are a result of strong winds blowing over a large area called a fetch combined with low pressure systems. Long period swells are often very dangerous to tankers as they may literally snap them in half. Dangerous waves or surges may also be caused by storm surges and tsunami’s resulting in widespread coastal damage and loss of life.

In oceanography, a sea state is the general condition of the free surface on a large body of water—with respect to wind waves and swell—at a certain location and moment. A sea state is characterized by statistics, including the wave height, period, and power spectrum. The sea state varies with time, as the wind conditions or swell conditions change.

Precautions: Storm surges / High Seas

Ships should “idle” into the swell and wind so that the bow of the ship always faces the oncoming swell. If in a small sailing vessel reduce the sail area and steer into the oncoming swell. If along the shore-line stay well back from the highest high water mark as Secure all hatches, doors, windows and ports. Secure all loose items in the interior.

Pump the bilge’s dry and keep pumping them dry at regular intervals. Stow away all loose gear and lash down any large items that cannot be stowed. Break out your life preservers and inform your crew that everyone will be putting them on well in advance of their necessity.

Break out emergency gear like flares and first aid kit, sea anchor, safety harnesses, etc.
Check your position and update your course as plotted on your chart. Prepare alternative routes to more protected areas. If you think you will be in for relatively long haul prepare some hot soup, coffee or stew freak waves may run up beyond the normal high water mark.

If the sea recedes exposing rock and sea bed normally not exposed immediately seek higher ground at least 50m above your current position. Do not try swimming or fishing or other marine recreation during these events. Only extremely experienced surfers will temp their fate under these conditions.

Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

Report any incidents to the Garden Route DM Disaster Management Centre at: 044-805 5071

Severe Weather Alert

A Severe Weather Alert was issued by the Cape Town Weather Office as follows:

Hazard: Heavy Rain
Alert Level: Advisory
Valid From (SAST): 10/03/19 – 00h00
Valid To (SAST): 11/03/19 – 00h00

An intense cut-off low is expected to affect the Western Cape on Sunday into Monday. The public is advised that heavy rain and flooding is expected over the Garden Route, Overberg District and Breede River Valley.

Hazard: Flooding
Alert Level: Advisory
Valid From (SAST): 10/03/19 – 00h00
Valid To (SAST): 11/03/19 – 00h00

An intense cut-off low is expected to affect the Western Cape on Sunday into Monday. The public is advised that heavy rain and flooding is expected over the Garden Route, Overberg District and Breede River Valley.

Hazard: Damaging Winds
Alert Level: Advisory
Valid From (SAST): 10/03/19 – 00h00
Valid To (SAST): 11/03/19 – 00h00

An intense cut-off low is expected to affect the Western Cape on Sunday into Monday. Strong to gale force winds are also expected along the south and south-western coastal areas on Sunday into Monday.

Description: Strong damaging winds

Strong damaging winds often occur along coastal regions, but also often occur during thunderstorm activity. These winds are sudden and can cause much damage.

Precautions:  Strong damaging winds

Stay indoors where possible away from the windows that open towards the severe winds. Be aware of the following: – sudden cross winds if traveling especially between buildings, fallen trees or power lines and flying debris.
Small boats must stay away from the open sea and seek the shelter of a harbour, river estuary or protected bay.
Parked aircraft should be pointed into the direction of the wind and secured Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

Description: Flooding / Heavy Rain

Flooding occurs when water overflows its normal channels such as streams and storm water drains. It can occur with prolonged period of rain, with continuous heavy falls or in the form of flash floods which are usually associated with severe thunderstorms. Heavy rain may also result in river flooding causing damage downstream to areas that may receive no rainfall at all during the flooding event.

Precautions: Flooding / Heavy Rain

If possible stay indoors and off the roads, avoid crossing rivers and swollen streams where water is above your ankles. If trapped in flooding in a vehicle, abandon it and climb to higher ground. In buildings, move valuables to a safe place above the expected flood level. Switch off electricity at the supply point to the building. In rural areas protect/relocate animals to a safe place on higher ground. Abandon your home immediately if evacuation is recommended, before access is cut off by flood water.  NEVER drive on a road covered by water. You do not know how deep it is or if the road has been washed away. If the vehicle stalls, leave it immediately and seek higher ground. Be especially cautious at night when it’s harder to recognize flood dangers. Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

Severe Weather Alert

A Severe Weather Alert was issued by the Cape Town Weather Office as follows:

Hazard: Veld Fire Conditions
Alert Level: Warning
Valid From (SAST): 06/03/19 – 10h00
Valid To (SAST): 06/03/19 – 18h00

WARNING:  Expected in places over the Central Karoo and Little Karoo (Western Cape) tomorrow (Wednesday).

Description: Dangerous veld/bush fire conditions

Whenever there are prolonged periods of little and no rain coupled with warm dry winds, veld or bush fires can easily be sparked and will spread rapidly in strong winds.

Precautions: Dangerous veld/bush fire conditions

Do not make fires in the open and/or leave fires unattended. Do not throw cigarette butts out of cars or in the open veld.  Do not throw bottles in the veld as they can magnify the sun’s rays and start fires. Prepare and maintain fire breaks in controlled manner. In the case of a large fire, report it immediately and move away from the area to let the professionals deal with it. Never throw water onto a fire started by an electrical fault or fires started by oil or paraffin lamps. In this case sand or a blanket should be used to smother the fire. Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

WARNING -Veld Fire Conditions

Hazard Alert
Level
Valid from
(SAST)
Valid to
(SAST)
Veld Fire Conditions Warning 28/01/19 – 09h00 29/01/19 – 18h00
Veld fire conditions expected in places over the northern West Coast District and Peninsula of the Cape Metropole (Western Cape) today (Monday), but only in places over the Namakwa District (Northern Cape), Central and Little Karoo (Western Cape) tomorrow (Tuesday).
Description: Dangerous veld/bush fire conditions
Whenever there are prolonged periods of little and no rain coupled withwarm dry winds, veld or bush fires can easily be sparked and will spreadrapidly in strong winds.

Precautions: Dangerous veld/bush fire conditions
Do not make fires in the open and/or leave fires unattended. Do not throw cigarette butts out of cars or in the open veld. Do not throw bottles in the veld as they can magnify the sun’s rays and start fires. Prepare and maintain fire breaks in controlled manner. In the case of a large fire, report it immediately and move away from the area to let the professionals deal with it. Never throw water onto a fire started by an electrical fault or fires started by oil or paraffin lamps. In this case, sand or a blanket should beused to smother the fire. Listen to the radio or TV for warnings and obey the instructions from Disaster Management Officers. 

Description: Extremely High Temperatures
When temperature and the humidity is high at the same time, or when
the temperature exceeds a certain threshold, human’s ability to cool theirbodies through sweating is reduced. This can be a real threat that may leads to hyperthermia.

Precautions: Extremely High Temperatures
Stay indoors in a cool room near a fan, if possible. The old and infirm must take extra care to stay hydrated and cool. Avoid strenuous outdoor activity, playing excessive sport and hard labour. Dress in light weight clothes and drink plenty of liquids, NOT alcohol.

Listen to the radio or TV for warnings and obey the instructions from Disaster Management Officers.

Severe Weather Alert

Hazard Alert Level Valid From (SAST) Valid To (SAST)
Heavy rain Watch 27/11/18 06h00 28/11/18 06h00
Heavy rain is expected in places over the Overberg District and the coastal areas of the Garden Route District today (Tuesday) into tomorrow morning (Wednesday).

Description: Strong damaging winds
Strong damaging winds often occur along coastal regions, but also often occur during thunderstorm activity. These winds are sudden and can cause much damage.

Precautions:  Strong damaging winds
Stay indoors where possible away from the windows that open towards the severe winds. Be aware of the following: – sudden cross winds if traveling especially between buildings, fallen trees or power lines and flying debris.
Small boats must stay away from the open sea and seek the shelter of a harbour, river estuary or protected bay.
Parked aircraft should be pointed into the direction of the wind and secured Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

Description: Flooding / Heavy Rain

Flooding occurs when water overflows its normal channels such as streams and storm water drains. It can occur with prolonged period of rain, with continuous heavy falls or in the form of flash floods which are usually associated with severe thunderstorms. Heavy rain may also result in river flooding causing damage downstream to areas that may receive no rainfall at all during the flooding event.

Precautions: Flooding / Heavy Rain

If possible stay indoors and off the roads, avoid crossing rivers and swollen streams where water is above your ankles. If trapped in flooding in a vehicle, abandon it and climb to higher ground. In buildings, move valuables to a safe place above the expected flood level. Switch off electricity at the supply point to the building. In rural areas protect/relocate animals to a safe place on higher ground. Abandon your home immediately if evacuation is recommended, before access is cut off by flood water. NEVER drive on a road covered by water. You do not know how deep it is or if the road has been washed away. If the vehicle stalls, leave it immediately and seek higher ground. Be especially cautious at night when it’s harder to recognize flood dangers. Listen to the radio or TV for warnings and obey the instructions from disaster management officers.

Duty Forecaster (Cape Town Regional Office – 04h00-20h30)
Tel: +27 21 935 5777
Duty Forecaster (National Forecasting Center – 20h30-04h00)
Tel: +27 12 367 6041
Fax: +27 21 934 3296
E-mail: factfc@weathersa.co.za