Alert archive / Arizona / Freeze Warnings in 2021
Freeze Warning 2, NWS Phoenix, AZ
NWS Phoenix, AZ issued this freeze warning at Feb 28, 2021, 2:04 PM MST for Pinal County, Arizona. It took effect at Mar 1, 2021, 2:00 AM MST. It was in force for 7 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
- Feb 28, 2021, 2:04 PM MST (21:04 UTC)
- In effect from
- Mar 1, 2021, 2:00 AM MST
- Expired
- Mar 1, 2021, 9:00 AM MST
- In force
- 7 hr
- Issued by
- NWS Phoenix, AZ
County Pinal County, AZ
The radar
The Phoenix radar (KIWA), 52 km from the middle of the area, began a volume at 21:02 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 12:00Z, 9.1 hours before the alert went out and 92 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
- 3286 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- -119 m²/s²
- 0-3 km storm-relative helicity
- -29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
606 WWUS75 KPSR 282104 NPWPSR URGENT - WEATHER MESSAGE National Weather Service Phoenix AZ 204 PM MST Sun Feb 28 2021 AZZ553-011100- /O.NEW.KPSR.FZ.W.0002.210301T0900Z-210301T1600Z/ Northwest Pinal County- Including the cities of Casa Grande, Florence, and Coolidge 204 PM MST Sun Feb 28 2021 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM MST MONDAY... * WHAT...Temperatures in the lower 30s expected. * WHERE...Northwest Pinal County. * WHEN...From 2 AM to 9 AM MST Monday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ CAZ560-564-565-568-282300- /O.CON.KPSR.WI.Y.0005.000000T0000Z-210228T2300Z/ Joshua Tree NP West-Chuckwalla Mountains- Imperial County Southeast-Chiriaco Summit- Including the cities of Cottonwood Visitor, Lost Horse-Keys Village, Imperial Hot Mineral Springs, Winterhaven, and Chiriaco Summit 104 PM PST Sun Feb 28 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... * WHAT...North winds 15 to 25 mph with gusts up to 45 mph. * WHERE...Chiriaco Summit, Western portion of Joshua Tree National Park, Southeastern Imperial County and Chuckwalla Mountains. * WHEN...Until 3 PM PST this afternoon. * IMPACTS...Difficult driving conditions, especially for larger vehicles traveling along roads with crosswinds. Light, unsecured objects may become airborne. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Advisory means that sustained wind speeds of between 30 and 40 mph are expected, or wind gusts of between 40 and 58 mph. Winds this strong can make driving difficult, especially for high profile vehicles. In addition, strong winds over desert areas could result in briefly lowered visibilities to well under a mile at times in blowing dust or blowing sand. Use extra caution. && $$ AZZ530>533-535-536-CAZ569-570-282300- /O.CON.KPSR.WI.Y.0005.000000T0000Z-210228T2300Z/ Parker Valley-Kofa-Yuma-Central La Paz-Southeast Yuma County- Gila River Valley-Palo Verde Valley-Chuckwalla Valley- Including the cities of Parker, Ehrenberg, Palm Canyon, Yuma, Fortuna Foothills, Brenda, Harcuvar, Quartzsite, Vicksburg, Vicksburg Junction, Salome, Ligurta, Martinez Lake, Blythe, Palo Verde, Ripley, and Midland 204 PM MST Sun Feb 28 2021 /104 PM PST Sun Feb 28 2021/ ...WIND ADVISORY REMAINS IN EFFECT UNTIL 4 PM MST /3 PM PST THIS AFTERNOON... * WHAT...North winds 15 to 20 mph with gusts up to 40 mph. * WHERE...In Arizona, Gila River Valley, Southeast Yuma County, Kofa, Parker Valley, Central La Paz County and Yuma. In California, Palo Verde Valley and Chuckwalla Valley. * WHEN...Until 4 PM MST /3 PM PST this afternoon. * IMPACTS...Difficult driving conditions, especially for larger vehicles traveling along roads with crosswinds. Light, unsecured objects may become airborne. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Advisory means that sustained wind speeds of between 30 and 40 mph are expected, or wind gusts of between 40 and 58 mph. Winds this strong can make driving difficult, especially for high profile vehicles. In addition, strong winds over desert areas could result in briefly lowered visibilities to well under a mile at times in blowing dust or blowing sand. Use extra caution. && $$
2 follow-up statements
963 WWUS75 KPSR 282301 NPWPSR URGENT - WEATHER MESSAGE National Weather Service Phoenix AZ 401 PM MST Sun Feb 28 2021 AZZ530>533-535-536-CAZ560-564-565-568>570-010015- /O.EXP.KPSR.WI.Y.0005.000000T0000Z-210228T2300Z/ Parker Valley-Kofa-Yuma-Central La Paz-Southeast Yuma County- Gila River Valley-Joshua Tree NP West-Chuckwalla Mountains- Imperial County Southeast-Chiriaco Summit-Palo Verde Valley- Chuckwalla Valley- Including the cities of Parker, Ehrenberg, Palm Canyon, Yuma, Fortuna Foothills, Brenda, Harcuvar, Quartzsite, Vicksburg, Vicksburg Junction, Salome, Ligurta, Cottonwood Visitor, Lost Horse-Keys Village, Imperial Hot Mineral Springs, Winterhaven, Chiriaco Summit, Martinez Lake, Blythe, Palo Verde, Ripley, and Midland 401 PM MST Sun Feb 28 2021 /301 PM PST Sun Feb 28 2021/ ...WIND ADVISORY HAS EXPIRED... $$ AZZ553-011115- /O.CON.KPSR.FZ.W.0002.210301T0900Z-210301T1600Z/ Northwest Pinal County- Including the cities of Casa Grande, Florence, and Coolidge 401 PM MST Sun Feb 28 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM MST MONDAY... * WHAT...Temperatures in the lower 30s. * WHERE...Northwest Pinal County. * WHEN...From 2 AM to 9 AM MST Monday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$
431 WWUS75 KPSR 010736 NPWPSR URGENT - WEATHER MESSAGE National Weather Service Phoenix AZ 1236 AM MST Mon Mar 1 2021 AZZ553-011600- /O.CON.KPSR.FZ.W.0002.210301T0900Z-210301T1600Z/ Northwest Pinal County- Including the cities of Casa Grande, Florence, and Coolidge 1236 AM MST Mon Mar 1 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM MST THIS MORNING... * WHAT...Temperatures in the lower 30s expected. * WHERE...Northwest Pinal County. * WHEN...Until 9 AM MST this morning. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$
Nearby
Freeze Warnings in Arizona, 2021Every freeze 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.