Alert archive / Wyoming / Red Flag Warnings in 2022
Red Flag Warning 13, NWS Cheyenne, WY
NWS Cheyenne, WY issued this red flag warning at Jul 20, 2022, 7:56 PM MDT for 4 counties in Wyoming. It took effect at Jul 21, 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
- Jul 20, 2022, 7:56 PM MDT (01:56 UTC)
- In effect from
- Jul 21, 2022, 11:00 AM MDT
- Expired
- Jul 21, 2022, 8:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Cheyenne, WY
Counties Converse County, WY, Goshen County, WY, Niobrara County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 157 km from the middle of the area, began a volume at 01:59 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 00:00Z, 1.9 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
- 3675 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- -38 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
217 WWUS85 KCYS 210156 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 756 PM MDT Wed Jul 20 2022 ...CRITICAL FIRE WEATHER CONDITIONS CONTINUE THURSDAY... WYZ417-418-211200- /O.EXP.KCYS.FW.W.0012.000000T0000Z-220721T0200Z/ /O.NEW.KCYS.FW.W.0013.220721T1700Z-220722T0200Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- 756 PM MDT Wed Jul 20 2022 ...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR FIRE WEATHER ZONES 417 AND 418... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MDT THURSDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 417 AND 418... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 11 AM to 8 PM MDT Thursday. * WIND...West to northwest winds 15 to 20 MPH with gusts up to 35 MPH possible, especially across southern Converse County. * HUMIDITY...Minimum 8 to 12 percent. * IMPACTS...Any new or active fires 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. && $$ CLH
2 follow-up statements
240 WWUS85 KCYS 210747 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 147 AM MDT Thu Jul 21 2022 ...CRITICAL FIRE WEATHER CONDITIONS THURSDAY... WYZ417-418-220000- /O.CON.KCYS.FW.W.0013.220721T1700Z-220722T0200Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- 147 AM MDT Thu Jul 21 2022 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 417 AND 418... The National Weather Service in Cheyenne has issued a Red Flag Warning, which is in effect from 11 AM to 8 PM MDT Thursday. * WIND...West to northwest winds 15 to 25 MPH with gusts up to 30 MPH, especially across southern Converse County. * HUMIDITY...Minimum 8 to 12 percent. * IMPACTS...Any new or active fires will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of gusty winds, low relative humidity and warm temperatures can contribute to extreme fire behavior. && $$
249 WWUS85 KCYS 211947 RFWCYS URGENT - FIRE WEATHER MESSAGE National Weather Service Cheyenne WY 147 PM MDT Thu Jul 21 2022 ...CRITICAL FIRE WEATHER CONDITIONS THURSDAY... WYZ417-418-220400- /O.NEW.KCYS.FW.A.0011.220722T1800Z-220723T0200Z/ /O.CON.KCYS.FW.W.0013.000000T0000Z-220722T0200Z/ Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- Middle North Platte River Basin/Niobrara and Converse High Plains- 147 PM MDT Thu Jul 21 2022 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 417 AND 418... ...FIRE WEATHER WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH FRIDAY EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 417 AND 418... The National Weather Service in Cheyenne has issued a Fire Weather Watch, which is in effect from Friday afternoon through Friday evening. Red Flag Warning continues this afternoon. * WIND...West to northwest winds 15 to 25 MPH with gusts up to 30 MPH, especially across southern Converse County. Similar winds expected Friday. * HUMIDITY...Minimum 8 to 12 percent. Similar humidity expected Friday. * IMPACTS...Any new or active fires 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 gusty winds, low relative humidity and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions may develop. Listen for later forecasts and possible Red Flag Warnings. && $$
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 1:47 PM MDT | Fire Weather Watch | CYS | Converse, Goshen, Niobrara, Platte | 12 hr |
Nearby
Red Flag Warnings in Wyoming, 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.