Alert archive / Wyoming / Red Flag Warnings in 2021
Red Flag Warning 13, NWS Rapid City, SD
NWS Rapid City, SD issued this red flag warning at Jun 15, 2021, 2:33 AM MDT for Campbell County, Crook County, Weston County, Wyoming. It took effect at Jun 15, 2021, 10:00 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
- Jun 15, 2021, 2:33 AM MDT (08:33 UTC)
- In effect from
- Jun 15, 2021, 10:00 AM MDT
- Expired
- Jun 15, 2021, 10:00 PM MDT
- In force
- 12 hr
- Issued by
- NWS Rapid City, SD
Counties Campbell County, WY, Crook County, WY, Weston County, WY
The radar
The Rapid City radar (KUDX), 165 km from the middle of the area, began a volume at 08:35 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, 8.6 hours before the alert went out and 162 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
- 1558 J/kg
- Mixed-layer CIN
- -171 J/kg
- Mixed-layer LCL
- 2097 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.2
The text
As transmitted.
000 WWUS83 KUNR 150833 RFWUNR URGENT - FIRE WEATHER MESSAGE National Weather Service Rapid City SD 233 AM MDT Tue Jun 15 2021 ...RED FLAG WARNING IN EFFECT FROM LATE THIS MORNING THROUGH THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE NORTHEASTERN WYOMING PLAINS... .Hot, dry and breezy conditions are expected today. By late morning, relative humidity will dip below 15 percent, and south to southwest winds will begin gusting over 25 mph. The gusty winds and very dry conditions are expected to last into the early evening hours before improving. WYZ314>317-160400- /O.UPG.KUNR.FW.A.0008.210615T1600Z-210616T0400Z/ /O.NEW.KUNR.FW.W.0013.210615T1600Z-210616T0400Z/ Northern Campbell-Southern Campbell-Crook County Plains- Weston County Plains- 233 AM MDT Tue Jun 15 2021 ...RED FLAG WARNING IN EFFECT FROM 10 AM THIS MORNING TO 10 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 314, 315, 316, AND 317... The National Weather Service in Rapid City has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 10 AM this morning to 10 PM MDT this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 314 Northern Campbell, 315 Southern Campbell, 316 Crook County Plains and 317 Weston County Plains. * WINDS...South 15 to 25 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...The combination of gusty winds and low relative humidity will produce critical fire weather conditions. 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. && $$
The office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 6:10 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 36 min |
| Jun 14, 6:30 PM MDT | Special Weather Statement | UNR | Campbell | 30 min |
| Jun 14, 7:46 PM MDT | Special Weather Statement | UNR | Campbell | 29 min |
| Jun 14, 9:51 PM MDT | Special Weather Statement | UNR | Weston | 39 min |
| Jun 14, 10:23 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 37 min |
| Jun 14, 11:01 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 44 min |
| Jun 14, 11:45 PM MDT | Severe Thunderstorm Warning | UNR | Weston | 32 min |
Nearby
Red Flag Warnings in Wyoming, 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.