Alert archive / Colorado / Freeze Watches in 2021
Freeze Watch 2, NWS Pueblo, CO
NWS Pueblo, CO issued this freeze watch at Sep 21, 2021, 3:55 AM MDT for 5 counties in Colorado. It took effect at Sep 22, 2021, 3:00 AM MDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Sep 21, 2021, 3:55 AM MDT (09:55 UTC)
- In effect from
- Sep 22, 2021, 3:00 AM MDT
- Expired
- Sep 21, 2021, 11:44 AM MDT
- In force
- 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 00:00Z, 9.9 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
- 3490 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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. && $$
2 follow-up statements
842 WWUS75 KPUB 211453 NPWPUB URGENT - WEATHER MESSAGE National Weather Service Pueblo CO 853 AM MDT Tue Sep 21 2021 COZ069>071-212300- /O.EXP.KPUB.FZ.W.0001.000000T0000Z-210921T1500Z/ /O.CON.KPUB.FZ.A.0002.210922T0900Z-210922T1500Z/ Del Norte Vicinity/Northern San Luis Valley Below 8500 Feet- Alamosa Vicinity/Central San Luis Valley Below 8500 Feet- Southern San Luis Valley- 853 AM MDT Tue Sep 21 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY MORNING... ...FREEZE WARNING WILL EXPIRE AT 9 AM MDT THIS MORNING... * WHAT...A Freeze Watch for minimum temperatures reaching the upper 20s to low 30s Wednesday morning. * WHERE...San Luis Valley below 8500 feet. * WHEN...From late tonight through Wednesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$
392 WWUS75 KPUB 211744 NPWPUB URGENT - WEATHER MESSAGE National Weather Service Pueblo CO 1144 AM MDT Tue Sep 21 2021 COZ069>071-220145- /O.UPG.KPUB.FZ.A.0002.210922T0900Z-210922T1500Z/ /O.NEW.KPUB.FZ.W.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- 1144 AM MDT Tue Sep 21 2021 ...FREEZE WARNING IN EFFECT FROM 3 AM TO 9 AM MDT WEDNESDAY... * WHAT...A hard freeze is expected early Wednesday morning over the San Luis Valley with temperatures reaching as low at 25F. * WHERE...The San Luis Valley below 8500 feet. * WHEN...From 3 AM to 9 AM MDT Wednesday. * 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. && $$
The office that day
Everything else NWS Pueblo, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 11:44 AM MDT | Freeze Warning | PUB | Alamosa, Conejos, Costilla, Rio Grande, Saguache | 21 hr |
Nearby
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.