Alert archive / Nebraska / Red Flag Warnings in 2021
Red Flag Warning 5, NWS North Platte, NE
NWS North Platte, NE issued this red flag warning at Apr 5, 2021, 1:28 PM CDT for 12 counties in Nebraska. 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
- Apr 5, 2021, 1:28 PM CDT (18:28 UTC)
- Expired
- Apr 5, 2021, 9:00 PM CDT
- In force
- 8 hr
- Issued by
- NWS North Platte, NE
Counties Blaine County, NE, Boyd County, NE, Brown County, NE, Cherry County, NE, Holt County, NE, Hooker County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Rock County, NE, Thomas County, NE
The radar
The North Platte radar (KLNX), 41 km from the middle of the area, began a volume at 18:29 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 12:00Z, 6.5 hours before the alert went out and 117 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
- 3442 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
918 WWUS83 KLBF 051828 RFWLBF URGENT - FIRE WEATHER MESSAGE National Weather Service North Platte NE 128 PM CDT Mon Apr 5 2021 ...CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON... .West winds will become northwest and then north this afternoon and this evening. Temperatures in the 80s and winds gusting to 30 mph will lead to critical fire weather conditions. NEZ206-208-060200- /O.NEW.KLBF.FW.W.0005.210405T1828Z-210406T0200Z/ Sandhills/Valentine NWR/Nebraska National Forest- Niobrara Valley/Fort Niobrara NWR/Samuel R McKelvie National Forest- 128 PM CDT Mon Apr 5 2021 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANDHILLS AND THE NIOBRARA RIVER VALLEY... The National Weather Service in North Platte has issued a Red Flag Warning FOR WIND AND LOW RELATIVE HUMIDITY, which is in effect until 9 PM CDT this evening. * Affected Area...In NEZ206...Fire Weather Zone 206 Sandhills/Valentine NWR/Nebraska National Forest. In NEZ208... Fire Weather Zone 208 Niobrara Valley/Fort Niobrara NWR/Samuel R McKelvie National Forest. * Winds...West 10 to 20 mph with gusts up to 30 mph becoming northwest and then north with the passage of a cold front. * Relative Humidity...As low as 11 percent. * Impacts...Any fire start will be capable of spreading rapidly and exhibiting erratic behavior. 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. && $$ http://weather.gov/LBF
1 follow-up statement
248 WWUS83 KLBF 060154 RFWLBF URGENT - FIRE WEATHER MESSAGE National Weather Service North Platte NE 854 PM CDT Mon Apr 5 2021 NEZ206-208-060300- /O.EXP.KLBF.FW.W.0005.000000T0000Z-210406T0200Z/ Sandhills/Valentine NWR/Nebraska National Forest- Niobrara Valley/Fort Niobrara NWR/Samuel R McKelvie National Forest- 854 PM CDT Mon Apr 5 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SANDHILLS AND NIOBRARA VALLEY... Humidity has recovered above critical levels and gusty winds have decreased, allowing the Red Flag Warning to expire. $$ http://weather.gov/LBF
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 7:53 PM CDT | Special Weather Statement | LBF | Custer | 37 min |
| Apr 5, 5:45 PM CDT | Special Weather Statement | LBF | Rock | 45 min |
| Apr 5, 6:16 PM CDT | Special Weather Statement | LBF | Holt | 44 min |
| Apr 5, 6:57 PM CDT | Special Weather Statement | LBF | Garfield, Holt, Loup | 48 min |
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.