Alert archive / Arizona / Excessive Heat Warnings in 2021
Excessive Heat Warning 4, NWS Tucson, AZ
NWS Tucson, AZ issued this excessive heat warning at Sep 10, 2021, 2:41 AM MST for Pima County, Pinal County, Arizona. It took effect at Sep 12, 2021, 10:00 AM MST. It was in force for 34 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
- Sep 10, 2021, 2:41 AM MST (09:41 UTC)
- In effect from
- Sep 12, 2021, 10:00 AM MST
- Expired
- Sep 13, 2021, 8:00 PM MST
- In force
- 34 hr
- Issued by
- NWS Tucson, AZ
Counties Pima County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 88 km from the middle of the area, began a volume at 09:38 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
Tuscon, AZ (KTUS), launched 00:00Z, 9.7 hours before the alert went out and 73 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
- 4245 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
131 WWUS75 KTWC 100941 NPWTWC URGENT - WEATHER MESSAGE National Weather Service Tucson AZ 241 AM MST Fri Sep 10 2021 AZZ501-502-102300- /O.NEW.KTWC.EH.W.0004.210912T1700Z-210914T0300Z/ Western Pima County-Tohono O'odham Nation- Including the cities of Ajo, Organ Pipe Cactus N.M., and Sells 241 AM MST Fri Sep 10 2021 ...EXCESSIVE HEAT WARNING IN EFFECT FROM 10 AM SUNDAY TO 8 PM MST MONDAY... * WHAT...Dangerously hot conditions with afternoon high temperatures Sunday and Monday of 105 to 111 degrees. * WHERE...Western Pima County and Tohono O'odham Nation. * WHEN...From 10 AM Sunday to 8 PM MST Monday. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Keep in mind you may need to adjust your plans based on the latest health and safety guidelines from CDC and your local officials. Cooling shelters may need to take your temperature or ask questions about how you are feeling. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
6 follow-up statements
186 WWUS75 KTWC 101920 NPWTWC URGENT - WEATHER MESSAGE National Weather Service Tucson AZ 1220 PM MST Fri Sep 10 2021 AZZ501-502-111200- /O.CON.KTWC.EH.W.0004.210912T1700Z-210914T0300Z/ Western Pima County-Tohono O'odham Nation- Including the cities of Ajo, Organ Pipe Cactus N.M., and Sells 1220 PM MST Fri Sep 10 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 10 AM SUNDAY TO 8 PM MST MONDAY... * WHAT...Dangerously hot conditions with afternoon high temperatures Sunday and Monday of 105 to 111 degrees. * WHERE...Western Pima County and Tohono O'odham Nation. * WHEN...From 10 AM Sunday to 8 PM MST Monday. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Keep in mind you may need to adjust your plans based on the latest health and safety guidelines from CDC and your local officials. Cooling shelters may need to take your temperature or ask questions about how you are feeling. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
824 WWUS75 KTWC 110928 NPWTWC URGENT - WEATHER MESSAGE National Weather Service Tucson AZ 228 AM MST Sat Sep 11 2021 AZZ501-502-112230- /O.CON.KTWC.EH.W.0004.210912T1700Z-210914T0300Z/ Western Pima County-Tohono O'odham Nation- Including the cities of Ajo, Organ Pipe Cactus N.M., and Sells 228 AM MST Sat Sep 11 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 10 AM SUNDAY TO 8 PM MST MONDAY... * WHAT...Dangerously hot conditions with afternoon high temperatures Sunday and Monday of 106 to 111 degrees. * WHERE...Western Pima County and Tohono O'odham Nation. * WHEN...From 10 AM Sunday to 8 PM MST Monday. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Keep in mind you may need to adjust your plans based on the latest health and safety guidelines from CDC and your local officials. Cooling shelters may need to take your temperature or ask questions about how you are feeling. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
774 WWUS75 KTWC 111916 NPWTWC URGENT - WEATHER MESSAGE National Weather Service Tucson AZ 1216 PM MST Sat Sep 11 2021 AZZ501-502-121200- /O.CON.KTWC.EH.W.0004.210912T1700Z-210914T0300Z/ Western Pima County-Tohono O'odham Nation- Including the cities of Ajo, Organ Pipe Cactus N.M., and Sells 1216 PM MST Sat Sep 11 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 10 AM SUNDAY TO 8 PM MST MONDAY... * WHAT...Dangerously hot conditions with afternoon high temperatures Sunday and Monday of 106 to 111 degrees. * WHERE...Western Pima County and Tohono O'odham Nation. * WHEN...From 10 AM Sunday to 8 PM MST Monday. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Keep in mind you may need to adjust your plans based on the latest health and safety guidelines from CDC and your local officials. Cooling shelters may need to take your temperature or ask questions about how you are feeling. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
577 WWUS75 KTWC 120940 NPWTWC URGENT - WEATHER MESSAGE National Weather Service Tucson AZ 240 AM MST Sun Sep 12 2021 AZZ501-502-122245- /O.CON.KTWC.EH.W.0004.210912T1700Z-210914T0300Z/ Western Pima County-Tohono O'odham Nation- Including the cities of Ajo, Organ Pipe Cactus N.M., and Sells 240 AM MST Sun Sep 12 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM MST MONDAY... * WHAT...Dangerously hot conditions with afternoon high temperatures Sunday and Monday of 106 to 111 degrees. * WHERE...Western Pima County and Tohono O'odham Nation. * WHEN...From 10 AM Sunday to 8 PM MST Monday. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Keep in mind you may need to adjust your plans based on the latest health and safety guidelines from CDC and your local officials. Cooling shelters may need to take your temperature or ask questions about how you are feeling. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
116 WWUS75 KTWC 121947 NPWTWC URGENT - WEATHER MESSAGE National Weather Service Tucson AZ 1247 PM MST Sun Sep 12 2021 AZZ501-502-131245- /O.CON.KTWC.EH.W.0004.000000T0000Z-210914T0300Z/ Western Pima County-Tohono O'odham Nation- Including the cities of Ajo, Organ Pipe Cactus N.M., and Sells 1247 PM MST Sun Sep 12 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST MONDAY... * WHAT...Dangerously hot conditions with afternoon high temperatures today and Monday of 106 to 111 degrees. * WHERE...Western Pima County and Tohono O'odham Nation. * WHEN...Until 8 PM MST Monday. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Keep in mind you may need to adjust your plans based on the latest health and safety guidelines from CDC and your local officials. Cooling shelters may need to take your temperature or ask questions about how you are feeling. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
270 WWUS75 KTWC 130910 NPWTWC URGENT - WEATHER MESSAGE National Weather Service Tucson AZ 210 AM MST Mon Sep 13 2021 AZZ501-502-140300- /O.CON.KTWC.EH.W.0004.000000T0000Z-210914T0300Z/ Western Pima County-Tohono O'odham Nation- Including the cities of Ajo, Organ Pipe Cactus N.M., and Sells 210 AM MST Mon Sep 13 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING... * WHAT...Dangerously hot conditions with afternoon high temperatures of 106 to 111 degrees. * WHERE...Western Pima County and Tohono O'odham Nation. * WHEN...Until 8 PM MST Monday. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Keep in mind you may need to adjust your plans based on the latest health and safety guidelines from CDC and your local officials. Cooling shelters may need to take your temperature or ask questions about how you are feeling. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Visit us on Facebook...Twitter...YouTube...and at weather.gov/Tucson
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 3:50 PM MST | Areal Flood Advisory | TWC | Pima | 115 min |
Nearby
Excessive Heat Warnings in Arizona, 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.