Alert archive / Nebraska / Red Flag Warnings in 2021
Red Flag Warning 7, NWS North Platte, NE
NWS North Platte, NE issued this red flag warning at Apr 11, 2021, 1:46 AM MDT for 12 counties in Nebraska. It took effect at Apr 11, 2021, 12:00 PM MDT. It was in force for 7 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
- Apr 11, 2021, 1:46 AM MDT (07:46 UTC)
- In effect from
- Apr 11, 2021, 12:00 PM MDT
- Expired
- Apr 11, 2021, 7:00 PM MDT
- In force
- 7 hr
- Issued by
- NWS North Platte, NE
Counties Arthur County, NE, Chase County, NE, Cherry County, NE, Deuel County, NE, Frontier County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Keith County, NE, Lincoln County, NE, Perkins County, NE, Sheridan County, NE
The radar
The North Platte radar (KLNX), 108 km from the middle of the area, began a volume at 07:45 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, 7.8 hours before the alert went out and 84 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
- 3209 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
176 WWUS83 KLBF 110746 RFWLBF URGENT - FIRE WEATHER MESSAGE National Weather Service North Platte NE 246 AM CDT Sun Apr 11 2021 ...CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON IN PARTS OF WESTERN NEBRASKA... .Breezy northwesterly winds in the wake of a cold front will combine with very dry air this afternoon to lead to critical fire weather conditions. Wind gusts up to 45 miles per hour combined with the low humidity could lead to rapid fire spread. NEZ204-210-219-120015- /O.NEW.KLBF.FW.W.0007.210411T1800Z-210412T0100Z/ Eastern Panhandle/Crescent Lake NWR-Frenchman Basin-Loess Plains- 246 AM CDT Sun Apr 11 2021 /146 AM MDT Sun Apr 11 2021/ ...RED FLAG WARNING IN EFFECT FROM 1 PM CDT /NOON MDT/ THIS AFTERNOON TO 8 PM CDT /7 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE EASTERN PANHANDLE, FRENCHMAN BASIN, AND THE LOESS PLAINS... The National Weather Service in North Platte has issued a Red Flag Warning FOR WIND AND LOW RELATIVE HUMIDITY, which is in effect from 1 PM CDT /noon MDT/ this afternoon to 8 PM CDT /7 PM MDT/ this evening. * Affected Area...In NEZ204...Fire Weather Zone 204 Eastern Panhandle/Crescent Lake NWR. In NEZ210...Fire Weather Zone 210 Frenchman Basin. In NEZ219...Fire Weather Zone 219 Loess Plains. * Winds...Northwest 25 to 30 mph with gusts up to 45 mph. * Relative Humidity...As low as 15 percent. * Impacts...Any fires which do develop have a high probability to spread rapidly and 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. && $$ http://weather.gov/LBF Brown
2 follow-up statements
587 WWUS83 KLBF 112010 RFWLBF URGENT - FIRE WEATHER MESSAGE National Weather Service North Platte NE 310 PM CDT Sun Apr 11 2021 ...CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON IN PARTS OF WESTERN NEBRASKA... .Breezy northwesterly winds in the wake of a cold front will combine with very dry air this afternoon to lead to critical fire weather conditions. Wind gusts up to 45 miles per hour combined with the low humidity could lead to rapid fire spread. NEZ204-210-219-120100- /O.CON.KLBF.FW.W.0007.000000T0000Z-210412T0100Z/ Eastern Panhandle/Crescent Lake NWR-Frenchman Basin-Loess Plains- 310 PM CDT Sun Apr 11 2021 /210 PM MDT Sun Apr 11 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT /7 PM MDT/ THIS EVENING... * Affected Area...In NEZ204...Fire Weather Zone 204 Eastern Panhandle/Crescent Lake NWR. In NEZ210...Fire Weather Zone 210 Frenchman Basin. In NEZ219...Fire Weather Zone 219 Loess Plains. * Winds...Northwest 20 to 30 mph with gusts up to 45 mph. * Relative Humidity...As low as 17 percent. * Impacts...Any fires which do develop have a high probability to spread rapidly and be difficult to control. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/LBF
468 WWUS83 KLBF 120058 RFWLBF URGENT - FIRE WEATHER MESSAGE National Weather Service North Platte NE 758 PM CDT Sun Apr 11 2021 NEZ204-210-219-120200- /O.EXP.KLBF.FW.W.0007.000000T0000Z-210412T0100Z/ Eastern Panhandle/Crescent Lake NWR-Frenchman Basin-Loess Plains- 758 PM CDT Sun Apr 11 2021 /658 PM MDT Sun Apr 11 2021/ ...RED FLAG WARNING WILL EXPIRE AT 8 PM CDT /7 PM MDT/ THIS EVENING... Humidity has recovered above critical levels and gusty winds are beginning to diminish, allowing the Red Flag Warning to expire. $$ 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.