Alert archive / Nebraska / Red Flag Warnings in 2021
Red Flag Warning 10, NWS North Platte, NE
NWS North Platte, NE issued this red flag warning at Aug 17, 2021, 1:55 AM MDT for 7 counties in Nebraska. It took effect at Aug 17, 2021, 11:00 AM MDT. It was in force for 8 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
- Aug 17, 2021, 1:55 AM MDT (07:55 UTC)
- In effect from
- Aug 17, 2021, 11:00 AM MDT
- Expired
- Aug 17, 2021, 7:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS North Platte, NE
Counties Arthur County, NE, Cherry County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Keith County, NE, Sheridan County, NE
The radar
The North Platte radar (KLNX), 111 km from the middle of the area, began a volume at 07:55 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 7.9 hours before the alert went out and 130 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
- 1107 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 2305 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.4
The text
As transmitted.
790 WWUS83 KLBF 170755 RFWLBF URGENT - FIRE WEATHER MESSAGE National Weather Service North Platte NE 255 AM CDT Tue Aug 17 2021 ...CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON... .South winds will increase to 15 to 20 mph with gusts of 25 to 30 mph this afternoon. Humidity will fall to around 15 percent and create a critical fire weather condition. NEZ204-180100- /O.UPG.KLBF.FW.A.0007.210817T1700Z-210818T0100Z/ /O.NEW.KLBF.FW.W.0010.210817T1700Z-210818T0100Z/ Eastern Panhandle/Crescent Lake NWR- 155 AM MDT Tue Aug 17 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE EASTERN PANHANDLE AND CRESCENT LAKE NWR... The National Weather Service in North Platte has issued a Red Flag Warning FOR WIND AND LOW RELATIVE HUMIDITY, which is in effect from 11 AM this morning to 7 PM MDT this evening. The Fire Weather Watch is no longer in effect. * Affected Area...In NEZ204...Fire Weather Zone 204 Eastern Panhandle/Crescent Lake NWR. * Winds...South 15 to 20 mph with gusts up to 30 mph. * Relative Humidity...As low as 15 percent. * Impacts...Weather conditions will be favorable for rapid fire growth and erratic fire behavior. Fires may be difficult to control. 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. && $$ http://weather.gov/LBF
2 follow-up statements
399 WWUS83 KLBF 172023 RFWLBF URGENT - FIRE WEATHER MESSAGE National Weather Service North Platte NE 323 PM CDT Tue Aug 17 2021 ...CRITICAL FIRE WEATHER CONDITIONS THROUGH EARLY THIS EVENING... .South winds will remain near 15 to 30 mph. Humidity will remain near 15 percent and create a critical fire weather condition. NEZ204-180100- /O.CON.KLBF.FW.W.0010.000000T0000Z-210818T0100Z/ Eastern Panhandle/Crescent Lake NWR- 223 PM MDT Tue Aug 17 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE EASTERN PANHANDLE AND CRESCENT LAKE NWR... * Affected Area...In NEZ204...Fire Weather Zone 204 Eastern Panhandle/Crescent Lake NWR. * Winds...South 15 to 25 mph with gusts up to 30 mph. * Relative Humidity...As low as 15 percent. * Impacts...Weather conditions will be favorable for rapid fire growth and erratic fire behavior. Fires may be difficult to control. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/LBF
453 WWUS83 KLBF 180056 RFWLBF URGENT - FIRE WEATHER MESSAGE National Weather Service North Platte NE 756 PM CDT Tue Aug 17 2021 ...CRITICAL FIRE WEATHER CONDITIONS ENDING ACROSS THE AREA... NEZ204-180200- /O.EXP.KLBF.FW.W.0010.000000T0000Z-210818T0100Z/ Eastern Panhandle/Crescent Lake NWR- 656 PM MDT Tue Aug 17 2021 ...RED FLAG WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE EASTERN PANHANDLE AND CRESCENT LAKE NWR... Relative humidity has increased across the eastern panhandle to 20 to 25 percent over the past hour. Critical fire weather conditions have ended across the area. $$ http://weather.gov/LBF
Nearby
Red Flag Warnings in Nebraska, 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.