Alert archive / Nebraska / Red Flag Warnings in 2017
Red Flag Warning 12, NWS North Platte, NE
NWS North Platte, NE issued this red flag warning at Sep 20, 2017, 2:41 PM MDT for 4 counties in Nebraska. It took effect at Sep 21, 2017, 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
- Sep 20, 2017, 2:41 PM MDT (20:41 UTC)
- In effect from
- Sep 21, 2017, 12:00 PM MDT
- Expired
- Sep 21, 2017, 6:59 PM MDT
- In force
- 7 hr
- Issued by
- NWS North Platte, NE
Counties Chase County, NE, Hayes County, NE, Lincoln County, NE, Perkins County, NE
The radar
The North Platte radar (KLNX), 148 km from the middle of the area, began a volume at 20:45 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 12:00Z, 8.7 hours before the alert went out and 73 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
- 2156 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- -126 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
750 WWUS83 KLBF 202041 RFWLBF URGENT - FIRE WEATHER MESSAGE National Weather Service North Platte NE 341 PM CDT Wed Sep 20 2017 ...RED FLAG WARNING IN EFFECT FOR THURSDAY AFTERNOON THROUGH EARLY THURSDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY OVER PORTIONS OF SOUTHWEST NEBRASKA... .Gusty south to southwest winds will develop Thursday afternoon which will support critical fire weather conditions across portions of southwest Nebraska. In addition, relative humidity values will drop to less than 15 percent by late afternoon. The combination of low relative humidity and gusty winds are expected to produce critical fire weather conditions. NEZ210-211045- /O.UPG.KLBF.FW.A.0006.170921T1800Z-170922T0100Z/ /O.NEW.KLBF.FW.W.0012.170921T1800Z-170922T0100Z/ Frenchman Basin- 241 PM MDT Wed Sep 20 2017 ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MDT THURSDAY FOR LOW RELATIVE HUMIDITY VALUES AND GUSTY WINDS FOR FIRE WEATHER ZONE 210... The National Weather Service in North Platte has issued a Red Flag Warning, which is in effect from noon to 7 PM MDT Thursday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire weather zone 210. * WIND...South at 15 to 25 mph with higher gusts. * HUMIDITY...Minimum relative humidity 10 to 15 percent. * IMPACTS...This combination of gusty winds and low relative humidities would 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. && $$ JWS
3 follow-up statements
307 WWUS83 KLBF 210915 RFWLBF URGENT - FIRE WEATHER MESSAGE National Weather Service North Platte NE 415 AM CDT Thu Sep 21 2017 ...RED FLAG WARNING REMAINS IN EFFECT FOR THIS AFTERNOON THROUGH EARLY EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY OVER PORTIONS OF SOUTHWEST NEBRASKA... .Gusty south winds will develop this afternoon which will support critical fire weather conditions across portions of southwest Nebraska. In addition, relative humidity values will drop to less than 15 percent. The combination of low relative humidity and gusty winds are expected to produce critical fire weather conditions. NEZ210-220100- /O.CON.KLBF.FW.W.0012.170921T1800Z-170922T0100Z/ Frenchman Basin- 315 AM MDT Thu Sep 21 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR LOW RELATIVE HUMIDITY VALUES AND GUSTY WINDS FOR FIRE WEATHER ZONE 210... * AFFECTED AREA...Fire weather zone 210. * WIND...South at 15 to 25 mph with higher gusts. * HUMIDITY...Minimum relative humidity 10 to 15 percent. * IMPACTS...This combination of gusty winds and low relative humidities would produce critical fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ CLB
328 WWUS83 KLBF 212058 AAA RFWLBF URGENT - FIRE WEATHER MESSAGE...UPDATED National Weather Service North Platte NE 358 PM CDT Thu Sep 21 2017 ...RED FLAG WARNING REMAINS IN EFFECT FOR LATE THIS AFTERNOON THROUGH EARLY EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY OVER PORTIONS OF SOUTHWEST NEBRASKA... .Gusty south winds will develop this afternoon which will support critical fire weather conditions across portions of southwest Nebraska. In addition, relative humidity values will drop to less than 15 percent. The combination of low relative humidity and gusty winds are expected to produce critical fire weather conditions. NEZ210-220100- /O.CON.KLBF.FW.W.0012.000000T0000Z-170922T0100Z/ Frenchman Basin- 258 PM MDT Thu Sep 21 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR LOW RELATIVE HUMIDITY VALUES AND GUSTY WINDS FOR FIRE WEATHER ZONE 210... * AFFECTED AREA...Fire weather zone 210. * WIND...South at 15 to 25 mph with higher gusts. * HUMIDITY...Minimum relative humidity 10 to 15 percent. * IMPACTS...This combination of gusty winds and low relative humidities would 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. && $$ POWER
910 WWUS83 KLBF 220059 RFWLBF URGENT - FIRE WEATHER MESSAGE National Weather Service North Platte NE 759 PM CDT Thu Sep 21 2017 ...RED FLAG EXPIRED OVER FAR SOUTHWEST NEBRASKA... NEZ210-220200- /O.CAN.KLBF.FW.W.0012.000000T0000Z-170922T0100Z/ Frenchman Basin- 659 PM MDT Thu Sep 21 2017 ...RED FLAG WARNING IS CANCELLED FOR LOW RELATIVE HUMIDITY VALUES AND GUSTY WINDS FOR FIRE WEATHER ZONE 210... The National Weather Service in North Platte has cancelled the Red Flag Warning. Relative humidity has increased with cooling temperatures and, combined with winds lessening some, critical fire weather conditions are no longer expected. $$ ET
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 19, 7:41 PM MDT | Severe Thunderstorm Warning | LBF | Keya Paha | 19 min |
| Sep 19, 7:59 PM MDT | Severe Thunderstorm Warning | LBF | Boyd, Keya Paha | 22 min |
| Sep 20, 2:32 AM MDT | Fire Weather Watch | LBF | Chase, Hayes, Lincoln, Perkins | 12 hr |
Nearby
Red Flag Warnings in Nebraska, 2017Every red flag warning in 2017
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.