Alert archive / California / Excessive Heat Warnings in 2021
Excessive Heat Warning 1, NWS Phoenix, AZ
NWS Phoenix, AZ issued this excessive heat warning at Jun 2, 2021, 2:15 AM PDT for Imperial County, Riverside County, San Bernardino County, California. It took effect at Jun 2, 2021, 11:00 AM PDT. It was in force for 58 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 2, 2021, 2:15 AM PDT (09:15 UTC)
- In effect from
- Jun 2, 2021, 11:00 AM PDT
- Expired
- Jun 4, 2021, 9:00 PM PDT
- In force
- 58 hr
- Issued by
- NWS Phoenix, AZ
Counties Imperial County, CA, Riverside County, CA, San Bernardino County, CA
The radar
The San Diego radar (KNKX), 154 km from the middle of the area, began a volume at 09:20 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
San Diego, CA (KNKX), launched 00:00Z, 9.3 hours before the alert went out and 174 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1501 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
747 WWUS75 KPSR 020915 NPWPSR URGENT - WEATHER MESSAGE National Weather Service Phoenix AZ 215 AM MST Wed Jun 2 2021 CAZ562-566-022300- /O.NEW.KPSR.EH.W.0001.210602T1800Z-210605T0400Z/ Imperial County Southwest-Imperial County West- Including the cities of Coolidge Springs, Salton City, Winona, Coyote Wells, Ocotillo, and Plaster City 215 AM PDT Wed Jun 2 2021 ...EXCESSIVE HEAT WARNING IN EFFECT FROM 11 AM THIS MORNING TO 9 PM PDT FRIDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 109 to 112 expected. * WHERE...Southwest corner of Imperial County and Western Imperial County. * WHEN...From 11 AM this morning to 9 PM PDT Friday. * IMPACTS...High Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat - lightweight and light- colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars. Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures. Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 9 1 1. Continue to monitor NWS forecasts, broadcast outlets, and local government for updates. && $$ CAZ561-570-022300- /O.NEW.KPSR.EH.W.0001.210602T1800Z-210605T0400Z/ Joshua Tree NP East-Chuckwalla Valley- Including the city of Midland 215 AM PDT Wed Jun 2 2021 ...EXCESSIVE HEAT WARNING IN EFFECT FROM 11 AM THIS MORNING TO 9 PM PDT FRIDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 103 to 113 expected. * WHERE...Eastern portion of Joshua Tree National Park and Chuckwalla Valley. * WHEN...From 11 AM this morning to 9 PM PDT Friday. * IMPACTS...High Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat - lightweight and light- colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars. Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures. Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 9 1 1. Continue to monitor NWS forecasts, broadcast outlets, and local government for updates. && $$
5 follow-up statements
249 WWUS75 KPSR 022005 NPWPSR URGENT - WEATHER MESSAGE National Weather Service Phoenix AZ 105 PM MST Wed Jun 2 2021 CAZ562-566-031200- /O.CON.KPSR.EH.W.0001.000000T0000Z-210605T0400Z/ Imperial County Southwest-Imperial County West- Including the cities of Coolidge Springs, Salton City, Winona, Coyote Wells, Ocotillo, and Plaster City 105 PM PDT Wed Jun 2 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT FRIDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 107 to 112. * WHERE...Southwest corner of Imperial County and Western Imperial County. * WHEN...Until 9 PM PDT Friday. * IMPACTS...High Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat - lightweight and light- colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars. Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures. Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 9 1 1. Continue to monitor NWS forecasts, broadcast outlets, and local government for updates. && $$ CAZ561-570-031200- /O.CON.KPSR.EH.W.0001.000000T0000Z-210605T0400Z/ Joshua Tree NP East-Chuckwalla Valley- Including the city of Midland 105 PM PDT Wed Jun 2 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT FRIDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 103 to 113. * WHERE...Eastern portion of Joshua Tree National Park and Chuckwalla Valley. * WHEN...Until 9 PM PDT Friday. * IMPACTS...High Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat - lightweight and light- colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars. Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures. Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 9 1 1. Continue to monitor NWS forecasts, broadcast outlets, and local government for updates. && $$
128 WWUS75 KPSR 031107 NPWPSR URGENT - WEATHER MESSAGE National Weather Service Phoenix AZ 407 AM MST Thu Jun 3 2021 CAZ562-566-032300- /O.CON.KPSR.EH.W.0001.000000T0000Z-210605T0400Z/ Imperial County Southwest-Imperial County West- Including the cities of Coolidge Springs, Salton City, Winona, Coyote Wells, Ocotillo, and Plaster City 407 AM PDT Thu Jun 3 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT FRIDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 107 to 112. * WHERE...Southwest corner of Imperial County and Western Imperial County. * WHEN...Until 9 PM PDT Friday. * IMPACTS...High Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat - lightweight and light- colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars. Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures. Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 9 1 1. Continue to monitor NWS forecasts, broadcast outlets, and local government for updates. && $$ CAZ561-570-032300- /O.CON.KPSR.EH.W.0001.000000T0000Z-210605T0400Z/ Joshua Tree NP East-Chuckwalla Valley- Including the city of Midland 407 AM PDT Thu Jun 3 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT FRIDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 113. * WHERE...Eastern portion of Joshua Tree National Park and Chuckwalla Valley. * WHEN...Until 9 PM PDT Friday. * IMPACTS...High Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat - lightweight and light- colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars. Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures. Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 9 1 1. Continue to monitor NWS forecasts, broadcast outlets, and local government for updates. && $$
665 WWUS75 KPSR 032206 NPWPSR URGENT - WEATHER MESSAGE National Weather Service Phoenix AZ 306 PM MST Thu Jun 3 2021 CAZ562-566-041130- /O.CON.KPSR.EH.W.0001.000000T0000Z-210605T0400Z/ Imperial County Southwest-Imperial County West- Including the cities of Coolidge Springs, Salton City, Winona, Coyote Wells, Ocotillo, and Plaster City 306 PM PDT Thu Jun 3 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT FRIDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 105 to 112. * WHERE...Southwest corner of Imperial County and Western Imperial County. * WHEN...Until 9 PM PDT Friday. * IMPACTS...High Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat - lightweight and light- colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars. Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures. Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 9 1 1. Continue to monitor NWS forecasts, broadcast outlets, and local government for updates. && $$ CAZ561-570-041130- /O.CON.KPSR.EH.W.0001.000000T0000Z-210605T0400Z/ Joshua Tree NP East-Chuckwalla Valley- Including the city of Midland 306 PM PDT Thu Jun 3 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT FRIDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 105 to 112. * WHERE...Eastern portion of Joshua Tree National Park and Chuckwalla Valley. * WHEN...Until 9 PM PDT Friday. * IMPACTS...High Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat - lightweight and light- colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars. Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures. Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 9 1 1. Continue to monitor NWS forecasts, broadcast outlets, and local government for updates. && $$
981 WWUS75 KPSR 041006 NPWPSR URGENT - WEATHER MESSAGE National Weather Service Phoenix AZ 306 AM MST Fri Jun 4 2021 CAZ562-566-042300- /O.CON.KPSR.EH.W.0001.000000T0000Z-210605T0400Z/ Imperial County Southwest-Imperial County West- Including the cities of Coolidge Springs, Salton City, Winona, Coyote Wells, Ocotillo, and Plaster City 306 AM PDT Fri Jun 4 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING... * WHAT...Dangerously hot conditions. Afternoon temperatures 108 to 112. * WHERE...Southwest corner of Imperial County and Western Imperial County. * WHEN...Until 9 PM PDT this evening. * IMPACTS...High Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat - lightweight and light- colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars. Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures. Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 9 1 1. Continue to monitor NWS forecasts, broadcast outlets, and local government for updates. && $$ CAZ561-570-042300- /O.CON.KPSR.EH.W.0001.000000T0000Z-210605T0400Z/ Joshua Tree NP East-Chuckwalla Valley- Including the city of Midland 306 AM PDT Fri Jun 4 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING... * WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 113. * WHERE...Eastern portion of Joshua Tree National Park and Chuckwalla Valley. * WHEN...Until 9 PM PDT this evening. * IMPACTS...High Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat - lightweight and light- colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars. Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures. Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 9 1 1. Continue to monitor NWS forecasts, broadcast outlets, and local government for updates. && $$
599 WWUS75 KPSR 042042 NPWPSR URGENT - WEATHER MESSAGE National Weather Service Phoenix AZ 142 PM MST Fri Jun 4 2021 CAZ562-566-050400- /O.CON.KPSR.EH.W.0001.000000T0000Z-210605T0400Z/ Imperial County Southwest-Imperial County West- Including the cities of Coolidge Springs, Salton City, Winona, Coyote Wells, Ocotillo, and Plaster City 142 PM PDT Fri Jun 4 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING... * WHAT...Dangerously hot conditions. Afternoon temperatures 107 to 112. * WHERE...Southwest corner of Imperial County and Western Imperial County. * WHEN...Until 9 PM PDT this evening. * IMPACTS...High Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat - lightweight and light- colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars. Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures. Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 9 1 1. Continue to monitor NWS forecasts, broadcast outlets, and local government for updates. && $$ CAZ561-570-050400- /O.CON.KPSR.EH.W.0001.000000T0000Z-210605T0400Z/ Joshua Tree NP East-Chuckwalla Valley- Including the city of Midland 142 PM PDT Fri Jun 4 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING... * WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 112. * WHERE...Eastern portion of Joshua Tree National Park and Chuckwalla Valley. * WHEN...Until 9 PM PDT this evening. * IMPACTS...High Heat Risk. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Excessive Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Stay indoors and seek air-conditioned buildings. Drink water, more than usual, and avoid dehydrating alcoholic, sugary, or caffeinated drinks. Dress for the heat - lightweight and light- colored clothing. Eat small meals and eat more often. Monitor those with a higher vulnerability to heat, including small children. Check in on family, friends, and neighbors, especially the elderly. If engaging in outdoor activity, take longer and more frequent breaks and avoid the hottest parts of the day. Never leave kids or pets unattended in cars. Public cooling shelters are available in some areas. Consult county officials for more details, which may include guidance for proper social distancing measures. Recognize the signs and symptoms of heat-related illness. Early signs include thirst and muscle cramps. Heat exhaustion may include: cool, moist, pale skin; headache; dizziness; weakness or exhaustion; nausea. The most serious illness is heat stroke, which may include: vomiting; confusion; throbbing headache; decreased alertness or loss of consciousness; high body temperature (above 105F); hot, dry skin; rapid, weak pulse; rapid, shallow breathing; seizures. Heat stroke can be DEADLY. Treat as an emergency and call 9 1 1. Continue to monitor NWS forecasts, broadcast outlets, and local government for updates. && $$
What forecasters said that day
The local office's own words before this excessive heat warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Phoenix, AZ wrote its last area forecast discussion before this excessive heat warning went out at Jun 1, 10:41 PM PDT, 3 hours 34 minutes earlier.
Area forecast discussion, Jun 1, 10:41 PM PDT, 3 hours 34 minutes before
Area Forecast Discussion National Weather Service Phoenix AZ 1041 PM MST Tue Jun 1 2021 .UPDATE... Updated Aviation discussion. && .SYNOPSIS... Temperatures will warm through the middle of the week with afternoon highs in the 102 to 107 degree range along with moderate heat risk for many places through the rest of the workweek. A persistent weak upper level low and a slight uptick in moisture will result in a chance of isolated showers and thunderstorms over the higher Arizona terrain most afternoons. Showers and storms are most favored to remain north and east of Phoenix but an isolated shower or thunderstorm may survive into the lower desert areas near Phoenix. A cooling trend is possible late in the weekend and early next week as low pressure increases from the west. && .DISCUSSION... The upper level RAP mesoscale analysis indicates N to E flow aloft on the north side of a closed cut-off low circulation over offshore Baja. A small vort max in NW MX is rotating out in front of the low. The skies are mostly clear across our region with northerly flow across the western States in advance of the strong ridge of high pressure building inland. There’s also some weak elevated CAPE south of Gila County. METSAT showed mostly clear skies across the region with convective CU and isolated mostly light showers/sprinkles and an isolated storm cell on radar returns forming across N and E and SE AZ. Mid-level WV shows some slightly elevated moisture across the lower deserts and some light patchy moisture with the cut-off low near Baja. Local ACARs soundings evolution showed W flow below 700 mb and NE flow above that with some elevated moisture near H5 and an above average PW near 0.65" which is near to slightly increased from yesterday. Yesterday’s high in Phoenix was 101 degrees. The month of May ended with 11 days of 100 degree plus days which is very near the normal of 100+ degree days for May in Phx. Today the warm-up continues with a highs of 102 to 104 in and around Phoenix and 103 to 106 out west. The models agree on the Baja cut-off low remaining mostly stationary through Thu as the ridge maintains strength over the West while only shifting slightly east also through Thu. As a result there is good confidence of the elevated heat persisting into Saturday. This will result in up to moderate heat risk and highs of 103-106 degrees in Phoenix and the lower deserts, and up to 104-109 out west. Highs are then expected stay close or just under this range on Sat. The lingering low pressure system will also make for low-end shower/storm chances each afternoon and evening through the late work week. The HREF family and the NMM6Km are still in good agreement on very isolated, weak high-terrain/Mogollon Rim showers/storms every afternoon and evening through Fri. These storms would be high-based storms with dry lightning and gusty outflow winds with little to no rainfall. The HRW FV3 may once again be a slightly more bullish outlier favoring slightly better coverage of storms E and near Phx. Although the low will be in position to rotate small vort disturbances across the area for a few days, it is still fairly weak and unable to attract more pronounced mid level (and BL) moisture, with the GEFs plume now showing PW spiking near 0.77" late this week. In addition there are still no IVT moisture plumes currently depicted in ensembles with this system. For Sat the Clusters analysis favors the ridge axis to the north flattening and shifting E with weak zonal troughing near the PAC NW. There is also flattened lingering high pressure and weak flow over the Desert SW along with dry conditions being favored. Tuesday Clusters depict differing positions of a W coast to W US trough with clusters 3 and 4 showing a slight potential for light QPF for central and S-Cent AZ likely associated with isolated showers and storms. There is slightly better confidence however for lower temperature from Sun and early next week associated with increasing low pressure from the W. && .AVIATION...Updated at 0541Z. South-Central Arizona including KPHX, KIWA, KSDL, and KDVT: The forecast area lies between a weak upper low is centered near the Baja Spur and a high amplitude ridge of high pressure with an axis near the West Coast. There will be varying amounts of cirrus streaming from northeast to southwest. Anticipate isolated afternoon thunderstorms once again over the Mogollon Rim, White Mountains and southeast AZ Wednesday afternoon. Storms are not expected over the Valley floor. While there is some potential for outflow from distant storms to reach the metro area, most likely there will be no associated wind shifts at the TAF sites. Otherwise, anticipate typical warm season surface winds with westerly directions continuing to weaken tonight and transition to downvalley/easterly directions (after 09Z for PHX). Upvalley/westerly directions resume midday/early afternoon Wednesday with gusts of 15-20kts common. Southeast California/Southwest Arizona including KIPL and KBLH: The forecast area lies between a weak upper low is centered near the Baja Spur and a high amplitude ridge of high pressure with an axis near the West Coast. The end result though will be varying amounts of thin cirrus and familiar warm season surface wind patterns with some afternoon gustiness (20-25kts). For KIPL, directions will favor south- southeast and at KBLH, south- southwest. && .FIRE WEATHER... Friday through Tuesday: Isolated thunderstorms, mainly over the AZ higher terrain, could drift into portions of Maricopa and Gila Counties, including the Tonto NF Thursday-Friday. The main threats with any storms, even distant ones, will be lightning and gusty outflow winds of 25-40 mph. Otherwise, the subtle moisture increase will not do much to improve RH with afternoon values dropping into the 7-15% range and overnight recoveries mostly in the 20-35% range. Outside of outflows, winds will generally be light to occasionally moderate and follow typical diurnal/terrain influences with afternoon breeziness. && .SPOTTER INFORMATION STATEMENT... Spotters should follow standard reporting procedures. && .PSR WATCHES/WARNINGS/ADVISORIES... AZ...None. CA...None. && DISCUSSION...Sawtelle AVIATION...AJ FIRE WEATHER...Sawtelle/AD
Nearby
Excessive Heat Warnings in California, 2021Every excessive heat warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.