Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 2, NWS Billings, MT
NWS Billings, MT issued this red flag warning at Mar 31, 2021, 2:32 PM MDT for Carter County, Fallon County, Montana. It took effect at Apr 1, 2021, 9:00 AM MDT. It was in force for 12 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
- Mar 31, 2021, 2:32 PM MDT (20:32 UTC)
- In effect from
- Apr 1, 2021, 9:00 AM MDT
- Expired
- Apr 1, 2021, 8:57 PM MDT
- In force
- 12 hr
- Issued by
- NWS Billings, MT
Counties Carter County, MT, Fallon County, MT
The radar
The Rapid City radar (KUDX), 238 km from the middle of the area, began a volume at 20:34 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, 8.5 hours before the alert went out and 241 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
- 1815 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
992 WWUS85 KBYZ 312032 RFWBYZ URGENT - FIRE WEATHER MESSAGE National Weather Service Billings MT 232 PM MDT Wed Mar 31 2021 MTZ133-012045- /O.UPG.KBYZ.FW.A.0002.210401T1500Z-210402T0300Z/ /O.NEW.KBYZ.FW.W.0002.210401T1500Z-210402T0300Z/ Sioux Ranger District Custer National Forest- 232 PM MDT Wed Mar 31 2021 ...RED FLAG WARNING IN EFFECT FROM 9 AM TO 9 PM MDT THURSDAY... The National Weather Service in Billings has issued a Red Flag Warning...which is in effect from Thursday morning through Thursday evening. The Fire Weather Watch is no longer in effect. * IMPACTS: Low humidities, unseasonably warm temperatures, and strong gusty winds will create erratic fire behavior and possible new fire starts. * AFFECTED AREA: In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In Northwest SD...Harding. In Southeast MT...Carter...Fallon. * WIND: South 10 to 20 mph with gusts 25 to 30 mph. * HUMIDITY: 11 to 16 percent. * TEMPERATURES: In the lower 70s. 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. && $$ http://weather.gov/Billings
3 follow-up statements
082 WWUS85 KBYZ 010911 RFWBYZ URGENT - FIRE WEATHER MESSAGE National Weather Service Billings MT 311 AM MDT Thu Apr 1 2021 MTZ133-020300- /O.CON.KBYZ.FW.W.0002.210401T1500Z-210402T0300Z/ Sioux Ranger District Custer National Forest- 311 AM MDT Thu Apr 1 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 9 PM MDT THIS EVENING... * IMPACTS: Low humidities, unseasonably warm temperatures, and gusty winds will create erratic fire behavior and possible new fire starts. * AFFECTED AREA: In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In Northwest SD...Harding. In Southeast MT...Carter...Fallon. * WIND: South 10 to 20 mph with gusts 25 to 30 mph. * HUMIDITY: 11 to 16 percent. * TEMPERATURES: Around 70 degrees. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/Billings
909 WWUS85 KBYZ 011536 RFWBYZ URGENT - FIRE WEATHER MESSAGE National Weather Service Billings MT 936 AM MDT Thu Apr 1 2021 MTZ133-020300- /O.CON.KBYZ.FW.W.0002.000000T0000Z-210402T0300Z/ Sioux Ranger District Custer National Forest- 936 AM MDT Thu Apr 1 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low humidities, unseasonably warm temperatures, and gusty winds will create erratic fire behavior and possible new fire starts. * AFFECTED AREA: In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In Northwest SD...Harding. In Southeast MT...Carter...Fallon. * WIND: South 10 to 20 mph with gusts 25 to 30 mph. * HUMIDITY: 11 to 16 percent. * TEMPERATURES: Around 70 degrees. 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. && $$ http://weather.gov/Billings
720 WWUS85 KBYZ 020257 RFWBYZ URGENT - FIRE WEATHER MESSAGE National Weather Service Billings MT 857 PM MDT Thu Apr 1 2021 MTZ133-020400- /O.CAN.KBYZ.FW.W.0002.000000T0000Z-210402T0300Z/ Sioux Ranger District Custer National Forest- 857 PM MDT Thu Apr 1 2021 ...RED FLAG WARNING WILL EXPIRE AT 9PM... The National Weather Service in Billings will allow the the Red Flag Warning to expire at 9pm. Wind speeds have diminished to around 10 mph and relative humidities are beginning to rise across the area, ending the dangerous fire weather conditions for tonight. $$ http://weather.gov/Billings
The office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 3:02 AM MDT | Fire Weather Watch | BYZ | Carter, Fallon | 12 hr |
Nearby
Red Flag Warnings in Montana, 2021Every red flag 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.