Alert archive / Colorado / Freeze Warnings in 2021
Freeze Warning 1, NWS Pueblo, CO
NWS Pueblo, CO issued this freeze warning at Sep 20, 2021, 2:50 PM MDT for 5 counties in Colorado. It took effect at Sep 21, 2021, 3:00 AM MDT. It was in force for 6 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 20, 2021, 2:50 PM MDT (20:50 UTC)
- In effect from
- Sep 21, 2021, 3:00 AM MDT
- Expired
- Sep 21, 2021, 9:00 AM MDT
- In force
- 6 hr
- Issued by
- NWS Pueblo, CO
Counties Alamosa County, CO, Conejos County, CO, Costilla County, CO, Rio Grande County, CO, Saguache County, CO
The nearest sounding before it
Grand Junction, CO (KGJT), launched 12:00Z, 8.8 hours before the alert went out and 279 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
- 2018 m above ground
- 0-6 km bulk shear
- 79 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
226 WWUS75 KPUB 202050 NPWPUB URGENT - WEATHER MESSAGE National Weather Service Pueblo CO 250 PM MDT Mon Sep 20 2021 COZ069>071-210500- /O.UPG.KPUB.FZ.A.0001.210921T0900Z-210921T1500Z/ /O.NEW.KPUB.FZ.W.0001.210921T0900Z-210921T1500Z/ Del Norte Vicinity/Northern San Luis Valley Below 8500 Feet- Alamosa Vicinity/Central San Luis Valley Below 8500 Feet- Southern San Luis Valley- 250 PM MDT Mon Sep 20 2021 ...FREEZE WARNING IN EFFECT FROM 3 AM TO 9 AM MDT TUESDAY... * WHAT...Sub-freezing temperatures with overnight lows in the upper 20s to lower 30s possible. Coldest temperatures are expected in the center of the valley. * WHERE...San Luis Valley below 8500 feet. * WHEN...From 3 AM to 9 AM MDT Tuesday. * 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. && $$
3 follow-up statements
413 WWUS75 KPUB 210258 NPWPUB URGENT - WEATHER MESSAGE National Weather Service Pueblo CO 858 PM MDT Mon Sep 20 2021 COZ069>071-211100- /O.CON.KPUB.FZ.W.0001.210921T0900Z-210921T1500Z/ Del Norte Vicinity/Northern San Luis Valley Below 8500 Feet- Alamosa Vicinity/Central San Luis Valley Below 8500 Feet- Southern San Luis Valley- 858 PM MDT Mon Sep 20 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 3 AM TO 9 AM MDT TUESDAY... * WHAT...Sub-freezing temperatures with overnight lows in the upper 20s to lower 30s possible. Coldest temperatures are expected in the center of the valley. * WHERE...San Luis Valley below 8500 feet. * WHEN...From 3 AM to 9 AM MDT Tuesday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ Hodanish
524 WWUS75 KPUB 210955 NPWPUB URGENT - WEATHER MESSAGE National Weather Service Pueblo CO 355 AM MDT Tue Sep 21 2021 COZ069>071-211800- /O.NEW.KPUB.FZ.A.0002.210922T0900Z-210922T1500Z/ /O.CON.KPUB.FZ.W.0001.000000T0000Z-210921T1500Z/ Del Norte Vicinity/Northern San Luis Valley Below 8500 Feet- Alamosa Vicinity/Central San Luis Valley Below 8500 Feet- Southern San Luis Valley- 355 AM MDT Tue Sep 21 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM MDT THIS MORNING... ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY MORNING... * WHAT...For the Freeze Warning this morning, sub-freezing temperatures in the upper 20s to lower 30s. For the Freeze Watch tonight into Wednesday morning, sub- freezing temperatures in the upper 20s to lower 30s are possible. * WHERE...the San Luis Valley below 8500 feet. * WHEN...For the Freeze Warning, until 9 AM MDT this morning. For the Freeze Watch, from late tonight through Wednesday 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. && $$
842 WWUS75 KPUB 211453 NPWPUB URGENT - WEATHER MESSAGE National Weather Service Pueblo CO 853 AM MDT Tue Sep 21 2021 COZ069>071-212300- /O.EXP.KPUB.FZ.W.0001.000000T0000Z-210921T1500Z/ /O.CON.KPUB.FZ.A.0002.210922T0900Z-210922T1500Z/ Del Norte Vicinity/Northern San Luis Valley Below 8500 Feet- Alamosa Vicinity/Central San Luis Valley Below 8500 Feet- Southern San Luis Valley- 853 AM MDT Tue Sep 21 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY MORNING... ...FREEZE WARNING WILL EXPIRE AT 9 AM MDT THIS MORNING... * WHAT...A Freeze Watch for minimum temperatures reaching the upper 20s to low 30s Wednesday morning. * WHERE...San Luis Valley below 8500 feet. * WHEN...From late tonight through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$
Nearby
Freeze Warnings in Colorado, 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.