Alert archive / Nebraska / Red Flag Warnings in 2012

Red Flag Warning 33, NWS North Platte, NE

August 18, 201211 counties in Nebraska

NWS North Platte, NE issued this red flag warning at Aug 18, 2012, 11:51 AM MDT for 11 counties in Nebraska. 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: Aug 18, 2012, 11:51 AM MDT (17:51 UTC)
Expired: Aug 18, 2012, 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, 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), 110 km from the middle of the area, began a volume at 17:54 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, 5.9 hours before the alert went out and 95 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1722 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 253 m²/s²
0-3 km storm-relative helicity: 351 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

408 
WWUS83 KLBF 181751
RFWLBF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1251 PM CDT SAT AUG 18 2012

...CRITICAL FIRE DANGER ACROSS PORTIONS OF WESTERN AND
SOUTHWESTERN NEBRASKA THIS AFTERNOON...

.GUSTY NORTHERLY WINDS GUSTING TO 30 MPH AT TIMES WILL COMBINE
WITH DRY AIR TO CAUSE CRITICAL FIRE DANGER THIS AFTERNOON. THE
PRIMARY AREA OF CONCERN IS ALONG AND SOUTH OF HIGHWAY 2 FROM
ANTIOCH TO MULLEN WHERE HUMIDITY WILL BE LOWEST.

NEZ204-210-190100-
/O.NEW.KLBF.FW.W.0033.120818T1751Z-120819T0100Z/
EASTERN PANHANDLE/CRESCENT LAKE NWR-FRENCHMAN BASIN-
1251 PM CDT SAT AUG 18 2012 /1151 AM MDT SAT AUG 18 2012/

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

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A RED
FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN
EFFECT UNTIL 8 PM CDT /7 PM MDT/ THIS EVENING.

* AFFECTED AREA...IN NEBRASKA...FIRE WEATHER ZONE 204 EASTERN 
  PANHANDLE/CRESCENT LAKE NWR AND FIRE WEATHER ZONE 210 
  FRENCHMAN BASIN.

* WINDS...NORTH 15 TO 25 MPH WITH GUSTS UP TO 30 MPH.

* RELATIVE HUMIDITY...AS LOW AS 14 PERCENT.

* IMPACTS...ANY FIRES WHICH START WILL HAVE A HIGH POTENTIAL FOR
  EXPLOSIVE GROWTH. A STRONG COLD FRONT WILL MOVE THROUGH THIS
  AFTERNOON. THE GUSTY NORTHERLY WINDS COULD MAKE FIRE CONTROL
  VERY DIFFICULT AND DANGEROUS.

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 WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

&&

$$

HTTP://WEATHER.GOV/LBF

1 follow-up statement

568 
WWUS83 KLBF 190103
RFWLBF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE NORTH PLATTE NE
803 PM CDT SAT AUG 18 2012

...RED FLAG WARNING HAS EXPIRED...

NEZ204-210-190215-
/O.EXP.KLBF.FW.W.0033.000000T0000Z-120819T0100Z/
EASTERN PANHANDLE/CRESCENT LAKE NWR-FRENCHMAN BASIN-
803 PM CDT SAT AUG 18 2012 /703 PM MDT SAT AUG 18 2012/

...RED FLAG WARNING HAS EXPIRED FOR RELATIVE HUMIDITY FOR
WESTERN NEBRASKA...

RELATIVE HUMIDITY CONTINUES TO INCREASE AND WINDS CONTINUE TO
DIMINISH ACROSS WESTERN NEBRASKA AND THE RED FLAG WARNING WAS
ALLOWED TO EXPIRE.

$$

HTTP://WEATHER.GOV/LBF

Nearby

Red Flag Warnings in Nebraska, 2012 Every red flag warning in 2012

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.