Alert archive / Nebraska / Red Flag Warnings in 2021

Red Flag Warning 6, NWS North Platte, NE

April 8, 202112 counties in Nebraska

NWS North Platte, NE issued this red flag warning at Apr 8, 2021, 2:22 AM MDT for 12 counties in Nebraska. It took effect at Apr 8, 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 8, 2021, 2:22 AM MDT (08:22 UTC)
In effect from
Apr 8, 2021, 12:00 PM MDT
Expired
Apr 8, 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 08:22 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, 8.4 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.

Skew-T log-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2021-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2021-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1559 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

753 
WWUS83 KLBF 080822
RFWLBF

URGENT - FIRE WEATHER MESSAGE
National Weather Service North Platte NE
322 AM CDT Thu Apr 8 2021

...CRITICAL FIRE WEATHER CONDITIONS LIKELY IN THE EASTERN
PANHANDLE AND SOUTHWESTERN NEBRASKA THIS AFTERNOON...

.Dry northwesterly winds will increase this afternoon to 15 to 20
MPH with frequent gusts to 30 MPH. As temperatures rise into the
upper 60s to around 70 degrees this afternoon, minimum relative
humidity will fall off to around 15 percent. The combination of
low relative humidity, gusty winds and dry fuels, will lead to
critical fire weather conditions.  

NEZ204-210-219-090100-
/O.NEW.KLBF.FW.W.0006.210408T1800Z-210409T0100Z/
Eastern Panhandle/Crescent Lake NWR-Frenchman Basin-Loess Plains-
322 AM CDT Thu Apr 8 2021 /222 AM MDT Thu Apr 8 2021/

...RED FLAG WARNING IN EFFECT FROM 1 PM CDT /NOON MDT/ THIS
AFTERNOON TO 8 PM CDT /7 PM MDT/ THIS EVENING FOR LOW RELATIVE
HUMIDITY AND GUSTY WINDS...

The National Weather Service in North Platte has issued a Red
Flag Warning for low relative humidity and gusty winds, 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 15 to 20 mph with gusts up to 30 mph.

* Timing...1 PM to 8 PM CDT (Noon to 7 PM MDT)

* Relative Humidity...As low as 15 percent.

* Temperatures...In the mid 60s.

* 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
2 follow-up statements
254 
WWUS83 KLBF 082023
RFWLBF

URGENT - FIRE WEATHER MESSAGE
National Weather Service North Platte NE
323 PM CDT Thu Apr 8 2021

...CRITICAL FIRE WEATHER CONDITIONS LIKELY IN THE EASTERN
PANHANDLE AND SOUTHWESTERN NEBRASKA THIS AFTERNOON...

.Dry northwesterly winds will increase this afternoon to 15 to
20 mph with frequent gusts to 30 mph. As temperatures rise into 
the upper 60s to around 70 degrees this afternoon, minimum 
relative humidity will fall off to around 15 percent. The 
combination of low relative humidity, gusty winds and dry fuels, 
will lead to critical fire weather conditions.

NEZ204-210-219-090100-
/O.CON.KLBF.FW.W.0006.000000T0000Z-210409T0100Z/
Eastern Panhandle/Crescent Lake NWR-Frenchman Basin-Loess Plains-
323 PM CDT Thu Apr 8 2021 /223 PM MDT Thu Apr 8 2021/

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT /7 PM MDT/
THIS EVENING FOR LOW RELATIVE HUMIDITY AND GUSTY WINDS...

* 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 10 to 20 mph with gusts up to 30 mph.

* Timing...1 PM to 8 PM CDT (Noon to 7 PM MDT)

* Relative Humidity...As low as 15 percent.

* Temperatures...Around 70.

* 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
676 
WWUS83 KLBF 090058
RFWLBF

URGENT - FIRE WEATHER MESSAGE
National Weather Service North Platte NE
758 PM CDT Thu Apr 8 2021

NEZ204-210-219-090200-
/O.EXP.KLBF.FW.W.0006.000000T0000Z-210409T0100Z/
Eastern Panhandle/Crescent Lake NWR-Frenchman Basin-Loess Plains-
758 PM CDT Thu Apr 8 2021 /658 PM MDT Thu Apr 8 2021/

...RED FLAG WARNING WILL EXPIRE AT 8 PM CDT /7 PM MDT/ THIS
EVENING FOR LOW RELATIVE HUMIDITY AND GUSTY WINDS...

Humidity has recovered above critical levels and gusty winds have
diminished, 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.