Alert archive / Wyoming / Freeze Warnings in 2021
Freeze Warning 1, NWS Cheyenne, WY
NWS Cheyenne, WY issued this freeze warning at Sep 19, 2021, 1:48 PM MDT for Albany County, Carbon County, Wyoming. It took effect at Sep 20, 2021, 1:00 AM MDT. 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
- Sep 19, 2021, 1:48 PM MDT (19:48 UTC)
- In effect from
- Sep 20, 2021, 1:00 AM MDT
- Expired
- Sep 20, 2021, 8:00 AM MDT
- In force
- 7 hr
- Issued by
- NWS Cheyenne, WY
Counties Albany County, WY, Carbon County, WY
The radar
The Cheyenne radar (KCYS), 140 km from the middle of the area, began a volume at 19:50 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
Riverton, WY (KRIW), launched 12:00Z, 7.8 hours before the alert went out and 230 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
- 2037 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
120 WWUS75 KCYS 191948 NPWCYS URGENT - WEATHER MESSAGE National Weather Service Cheyenne WY 148 PM MDT Sun Sep 19 2021 WYZ112-114-201200- /O.NEW.KCYS.FZ.W.0001.210920T0700Z-210920T1400Z/ Sierra Madre Range-Snowy Range- Including the cities of Centennial and Albany 148 PM MDT Sun Sep 19 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 8 AM MDT MONDAY... * WHAT...Sub-freezing temperatures as low as 27 expected. * WHERE...Sierra Madre Range and Snowy Range. * WHEN...From 1 AM to 8 AM MDT Monday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. If recreating outdoors, be sure to have the proper clothing for the freezing temperatures. 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. && $$ WYZ110-201200- /O.NEW.KCYS.FZ.A.0001.210921T0700Z-210921T1400Z/ /O.CON.KCYS.HW.W.0032.000000T0000Z-210920T0300Z/ North Snowy Range Foothills- Including the cities of Arlington and Elk Mountain 148 PM MDT Sun Sep 19 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... ...FREEZE WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... * WHAT...For the High Wind Warning, west winds 30 to 40 mph with gusts 50 to 60 mph. For the Freeze Watch, sub-freezing temperatures as low as 30 possible. * WHERE...North Snowy Range Foothills. * WHEN...For the High Wind Warning, until 9 PM MDT this evening. For the Freeze Watch, from late Monday night through Tuesday morning. * IMPACTS...Travel will be difficult, especially for high profile vehicles. Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. If recreating outdoors, be sure to have the proper clothing for the freezing temperatures. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ WYZ103>105-109-111-113-115-116-201200- /O.NEW.KCYS.FZ.A.0001.210921T0700Z-210921T1400Z/ North Laramie Range-Ferris/Seminoe/Shirley Mountains- Shirley Basin-Central Carbon County-Southwest Carbon County- Upper North Platte River Basin-Laramie Valley-South Laramie Range- Including the cities of Garrett, Esterbrook, Seminoe Dam, Medicine Bow, Shirley Basin, Rawlins, Baggs, Saratoga, Encampment, Laramie, Bosler, Buford, Pumpkin Vine, and Vedauwoo 148 PM MDT Sun Sep 19 2021 ...FREEZE WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 30 possible. * WHERE...North Laramie Range, Ferris/Seminoe/Shirley Mountains, Shirley Basin, Central Carbon County, Southwest Carbon County, Upper North Platte River Basin, Laramie Valley and South Laramie Range. * WHEN...From late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. If recreating outdoors, be sure to have the proper clothing for the freezing temperatures. 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. && $$
2 follow-up statements
930 WWUS75 KCYS 200234 NPWCYS URGENT - WEATHER MESSAGE National Weather Service Cheyenne WY 834 PM MDT Sun Sep 19 2021 WYZ110-201045- /O.EXP.KCYS.HW.W.0032.000000T0000Z-210920T0300Z/ /O.CON.KCYS.FZ.A.0001.210921T0700Z-210921T1400Z/ North Snowy Range Foothills- Including the cities of Arlington and Elk Mountain 834 PM MDT Sun Sep 19 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... ...HIGH WIND WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...North Snowy Range Foothills. * WHEN...From late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ WYZ112-114-201045- /O.CON.KCYS.FZ.W.0001.210920T0700Z-210920T1400Z/ Sierra Madre Range-Snowy Range- Including the cities of Centennial and Albany 834 PM MDT Sun Sep 19 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 8 AM MDT MONDAY... * WHAT...Sub-freezing temperatures as low as 27 expected. * WHERE...Snowy Range and Sierra Madre Range. * WHEN...From 1 AM to 8 AM MDT 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. && $$ WYZ103>105-109-111-113-115-116-201045- /O.CON.KCYS.FZ.A.0001.210921T0700Z-210921T1400Z/ North Laramie Range-Ferris/Seminoe/Shirley Mountains- Shirley Basin-Central Carbon County-Southwest Carbon County- Upper North Platte River Basin-Laramie Valley-South Laramie Range- Including the cities of Garrett, Esterbrook, Seminoe Dam, Medicine Bow, Shirley Basin, Rawlins, Baggs, Saratoga, Encampment, Laramie, Bosler, Buford, Pumpkin Vine, and Vedauwoo 834 PM MDT Sun Sep 19 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...Shirley Basin, South Laramie Range, Ferris/Seminoe/Shirley Mountains, Laramie Valley, Upper North Platte River Basin, North Laramie Range, Southwest Carbon County and Central Carbon County. * WHEN...From late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$
276 WWUS75 KCYS 200926 NPWCYS URGENT - WEATHER MESSAGE National Weather Service Cheyenne WY 326 AM MDT Mon Sep 20 2021 WYZ112-114-201400- /O.CON.KCYS.FZ.W.0001.000000T0000Z-210920T1400Z/ Sierra Madre Range-Snowy Range- Including the cities of Centennial and Albany 326 AM MDT Mon Sep 20 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM MDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 27 degrees expected. * WHERE...Snowy Range and Sierra Madre Range. * WHEN...Until 8 AM MDT 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. && $$ WYZ103>105-109>111-113-115-116-210000- /O.CON.KCYS.FZ.A.0001.210921T0700Z-210921T1400Z/ North Laramie Range-Ferris/Seminoe/Shirley Mountains- Shirley Basin-Central Carbon County-North Snowy Range Foothills- Southwest Carbon County-Upper North Platte River Basin- Laramie Valley-South Laramie Range- Including the cities of Garrett, Esterbrook, Seminoe Dam, Medicine Bow, Shirley Basin, Rawlins, Arlington, Elk Mountain, Baggs, Saratoga, Encampment, Laramie, Bosler, Buford, Pumpkin Vine, and Vedauwoo 326 AM MDT Mon Sep 20 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 29 degrees possible. * WHERE...Portions of southeast Wyoming along and west of the Laramie Range, including but not limited to Laramie, Rawlins, and Saratoga. * WHEN...From late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 19, 12:56 AM MDT | High Wind Warning | CYS | Albany, Carbon | 20 hr |
| Sep 19, 1:48 PM MDT | Freeze Watch | CYS | Albany, Carbon, Converse, Laramie, Platte | 24 hr |
Nearby
Freeze Warnings in Wyoming, 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.