Alert archive / Nebraska / Red Flag Warnings in 2011

Red Flag Warning 1, NWS North Platte, NE

February 17, 201124 counties in Nebraska

NWS North Platte, NE issued this red flag warning at Feb 17, 2011, 11:46 AM MST for 24 counties in Nebraska. It was in force for 5 hr. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Feb 17, 2011, 11:46 AM MST (18:46 UTC)
Expired: Feb 17, 2011, 5:00 PM MST
In force: 5 hr
Issued by: NWS North Platte, NE

All 24 counties

Arthur County, NE, Blaine County, NE, Brown County, NE, Chase County, NE, Cherry County, NE, Custer County, NE, Deuel County, NE, Frontier County, NE, Garden County, NE, Garfield County, NE, Grant County, NE, Hayes County, NE, Holt County, NE, Hooker County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Rock County, NE, Sheridan County, NE, Thomas County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 37 km from the middle of the area, began a volume at 18:50 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.

What was reported inside it

Time	Report	Where	Remark
Feb 17, 12:31 PM MST	NON-TSTM WND GST 59	8 Wsw Big Springs, NE	I-76 I-80 INTERCHANGE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 6.8 hours before the alert went out and 57 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: 2652 m above ground
0-6 km bulk shear: 80 kt
0-1 km storm-relative helicity: 166 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

029 
WWUS83 KLBF 171846
RFWLBF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1246 PM CST THU FEB 17 2011

...EXTREME FIRE WEATHER CONDITIONS THIS AFTERNOON...

.DRY AIR WAS FILTERING INTO THE THE EASTERN PANHANDLE AND WESTERN
NEBRASKA EARLY THIS AFTERNOON WHICH HAS LED TO RELATIVE HUMIDITY
LEVELS DROPPING TO THE 10 TO 20 PERCENT RANGE. IN
ADDITION...STRONG NORTHWEST WINDS BLOWING AT 20 TO 30 MPH GUSTING
TO 40 MPH DEVELOPED BEHIND A COLD FRONT THAT PASSED ACROSS THE
AREA THIS MORNING. THE COMBINATION OF THE DRY AIR AND AND STRONG
WINDS WILL LEAD TO EXTREME FIRE WEATHER DANGERS FOR THE REMAINDER
OF THE AFTERNOON.

NEZ204-206-209-210-219-180000-
/O.NEW.KLBF.FW.W.0001.110217T1846Z-110218T0000Z/
EASTERN PANHANDLE/CRESCENT LAKE NWR-
SANDHILLS/VALENTINE NWR/NEBRASKA NATIONAL FOREST/
SAMUEL R MCKELVIE NATIONAL FOREST-LOUP RIVERS BASIN-
FRENCHMAN BASIN-LOESS PLAINS-
1246 PM CST THU FEB 17 2011 /1146 AM MST THU FEB 17 2011/

...RED FLAG WARNING IN EFFECT UNTIL 6 PM CST /5 PM MST/ THIS
EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES
204...206...209...210 AND 219...

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A RED
FLAG WARNING FOR LOW RELATIVE HUMIDITIES AND GUSTY WINDS...WHICH IS IN
EFFECT UNTIL 6 PM CST /5 PM MST/ THIS EVENING.

* AFFECTED AREA...LOCATIONS SOUTH OF HIGHWAY 2 FROM ANTIOCH TO
  DUNNING AND SOUTH OF HIGHWAY 91 FROM DUNNING TO BARTLETT.

* WIND...NORTHWEST TO WEST WINDS WILL BLOW FROM 20 TO 30 MPH THIS
  AFTERNOON WITH GUSTS UP TO 40 MPH AT TIMES.

* HUMIDITY...RELATIVE HUMIDITY LEVELS WILL DROP TO THE 10 TO 20
  PERCENT RANGE ACROSS THE AFFECTED AREAS THROUGH THE AFTERNOON.

* IMPACTS...THE COMBINATION OF THE STRONG WINDS AND LOW RELATIVE
  HUMIDITY LEVELS WILL HAVE THE POTENTIAL TO CAUSE EXPLOSIVE FIRE
  GROWTH.

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/NORTHPLATTE

BROOKS

1 follow-up statement

635 
WWUS83 KLBF 180000 AAA
RFWLBF

URGENT - FIRE WEATHER MESSAGE...UPDATED
NATIONAL WEATHER SERVICE NORTH PLATTE NE
600 PM CST THU FEB 17 2011

NEZ204-206-209-210-219-180100-
/O.CAN.KLBF.FW.W.0001.000000T0000Z-110218T0000Z/
EASTERN PANHANDLE/CRESCENT LAKE NWR-
SANDHILLS/VALENTINE NWR/NEBRASKA NATIONAL FOREST/
SAMUEL R MCKELVIE NATIONAL FOREST-LOUP RIVERS BASIN-
FRENCHMAN BASIN-LOESS PLAINS-
600 PM CST THU FEB 17 2011 /500 PM MST THU FEB 17 2011/

...RED FLAG WARNING IS CANCELLED FOR GUSTY WINDS AND LOW HUMIDITY
FOR FIRE WEATHER ZONES 204...206...209...210 AND 219...

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS CANCELLED THE
RED FLAG WARNING. 

THE RED FLAG WARNING IS CANCELLED. RELATIVE HUMIDITY HAS RISEN
ABOVE 15 PERCENT AND WILL CONTINUE TO RISE THIS EVENING. WINDS
HAVE DECREASED BELOW 25 MPH AND WILL CONTINUE TO DECREASE THIS
EVENING.

$$


HTTP://WEATHER.GOV/NORTHPLATTE

The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 17, 2:49 AM MST	Wind Advisory	LBF	Arthur, Blaine, Boyd, Brown, Cherry, Deuel and 10 more	14 hr

Nearby

Red Flag Warnings in Nebraska, 2011 Every red flag warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.