Alert archive / Wyoming / Red Flag Warnings in 2022
Red Flag Warning 21, NWS Cheyenne, WY
NWS Cheyenne, WY issued this red flag warning at Sep 18, 2022, 1:36 PM MDT for 7 counties in Wyoming; Dawes County, Sioux County, Nebraska. It took effect at Sep 19, 2022, 11:00 AM MDT. It was in force for 9 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 18, 2022, 1:36 PM MDT (19:36 UTC)
- In effect from
- Sep 19, 2022, 11:00 AM MDT
- Expired
- Sep 19, 2022, 8:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Cheyenne, WY
Counties Dawes County, NE, Sioux County, NE, Albany County, WY, Carbon County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 120 km from the middle of the area, began a volume at 19:37 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
Rapid City, SD (KUNR), launched 12:00Z, 7.6 hours before the alert went out and 259 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
- 1434 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
348 WWUS85 KCYS 181936 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 136 PM MDT Sun Sep 18 2022 WYZ417>422-200100- /O.UPG.KCYS.FW.A.0019.220919T1800Z-220920T0200Z/ /O.NEW.KCYS.FW.W.0021.220919T1800Z-220920T0100Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- North Laramie Range and Adjacent High Plains- North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- 136 PM MDT Sun Sep 18 2022 ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MDT MONDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, AND 422... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 7 PM MDT Monday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire weather zone 417. Fire weather zone 418. Fire weather zone 419. Fire weather zone 420. Fire weather zone 421. Fire weather zone 422. * WIND...Southwest 20 to 25 MPH, with gusts 30 to 35 MPH. * HUMIDITY...10 to 15 percent. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ NEZ434-WYZ432-200100- /O.NEW.KCYS.FW.W.0021.220919T1800Z-220920T0100Z/ Pine Ridge/Nebraska National Forest-Bordeaux/Chugwater/Wheatland- 136 PM MDT Sun Sep 18 2022 ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MDT MONDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 432 AND 434... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 7 PM MDT Monday. * AFFECTED AREA...Fire weather zone 434. Fire weather zone 432. * WIND...Southwest 15 to 25 MPH, with gusts to 35 MPH. * HUMIDITY...10 to 15 percent. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ WYZ423-200100- /O.NEW.KCYS.FW.W.0021.220919T1800Z-220920T0100Z/ Southwest Carbon County- 136 PM MDT Sun Sep 18 2022 ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MDT MONDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 423... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from noon to 7 PM MDT Monday. * AFFECTED AREA...Fire weather zone 423. * WIND...Southwest 15 to 25 MPH, with gusts to 35 MPH. * HUMIDITY...10 to 15 percent. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ BW
3 follow-up statements
214 WWUS85 KCYS 190921 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 321 AM MDT Mon Sep 19 2022 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS EXPECTED TODAY... WYZ424>430-200200- /O.EXB.KCYS.FW.W.0021.220919T1700Z-220920T0200Z/ Sierra Madre Range/Medicine Bow NF-Upper North Platte River Basin- Snowy Range/Medicine Bow NF-North Snowy Range Foothills- Southern Laramie Valley-Southern Laramie Range- Laramie Foothills and High Plains- 321 AM MDT Mon Sep 19 2022 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 424, 425, 426, 427, 428, 429, AND 430... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 11 AM this morning to 8 PM MDT this evening. * WIND...West to southwest 15 to 25 MPH with gusts up to 35 MPH. * HUMIDITY...8 to 12 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ NEZ434-WYZ417>423-432-200200- /O.EXT.KCYS.FW.W.0021.220919T1700Z-220920T0200Z/ Pine Ridge/Nebraska National Forest- Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- North Laramie Range and Adjacent High Plains- North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Southwest Carbon County-Bordeaux/Chugwater/Wheatland- 321 AM MDT Mon Sep 19 2022 ...RED FLAG WARNING NOW IN EFFECT FROM 11 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 432, AND 434... * WIND...West to southwest 15 to 25 MPH with gusts up to 35 MPH. * HUMIDITY...8 to 12 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ CLH
884 WWUS85 KCYS 192130 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 330 PM MDT Mon Sep 19 2022 ...WIDESPREAD CRITICAL FIRE WEATHER CONDITIONS EXPECTED TODAY... NEZ434-WYZ417>430-432-200200- /O.CON.KCYS.FW.W.0021.000000T0000Z-220920T0200Z/ Pine Ridge/Nebraska National Forest- Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- North Laramie Range and Adjacent High Plains- North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Upper North Platte River Basin-Snowy Range/Medicine Bow NF- North Snowy Range Foothills-Southern Laramie Valley- Southern Laramie Range-Laramie Foothills and High Plains- Bordeaux/Chugwater/Wheatland- 330 PM MDT Mon Sep 19 2022 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR MOST OF SOUTHEAST WYOMING AND THE NORTHERN NEBRASKA PANHANDLE... * WIND...West to southwest 15 to 25 MPH with gusts up to 40 MPH. * HUMIDITY...8 to 13 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ TT
373 WWUS85 KCYS 200144 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 744 PM MDT Mon Sep 19 2022 NEZ434-WYZ417>430-432-200245- /O.EXP.KCYS.FW.W.0021.000000T0000Z-220920T0200Z/ Pine Ridge/Nebraska National Forest- Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- North Laramie Range and Adjacent High Plains- North Laramie Valley/Shirley Basin- Ferris/Seminoe/Shirley Mountains-Central and West Carbon- Southwest Carbon County-Sierra Madre Range/Medicine Bow NF- Upper North Platte River Basin-Snowy Range/Medicine Bow NF- North Snowy Range Foothills-Southern Laramie Valley- Southern Laramie Range-Laramie Foothills and High Plains- Bordeaux/Chugwater/Wheatland- 744 PM MDT Mon Sep 19 2022 ...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 432, AND 434... Winds have dropped after sunset and humidity values have risen above Red Flag criteria. Therefore the Red Flag Warning will be allowed to expire. $$
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 2:30 AM MDT | Fire Weather Watch | CYS | Albany, Carbon, Converse, Goshen, Niobrara, Platte | 11 hr |
| Sep 18, 3:42 AM MDT | Special Weather Statement | CYS | Morrill | 33 min |
Nearby
Red Flag Warnings in Wyoming, 2022Red Flag Warnings in Nebraska, 2022Every red flag warning in 2022
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.