Alert archive / Nebraska / Red Flag Warnings in 2011

Red Flag Warning 5, NWS North Platte, NE

April 9, 20115 counties in Nebraska

NWS North Platte, NE issued this red flag warning at Apr 9, 2011, 2:56 AM MDT for 5 counties in Nebraska. It took effect at Apr 9, 2011, 12:00 PM MDT. 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 9, 2011, 2:56 AM MDT (08:56 UTC)
In effect from: Apr 9, 2011, 12:00 PM MDT
Expired: Apr 9, 2011, 8:00 PM MDT
In force: 8 hr
Issued by: NWS North Platte, NE

Counties Chase County, NE, Frontier County, NE, Hayes County, NE, Lincoln County, NE, Perkins County, NE

The radar

The North Platte radar (KLNX), 147 km from the middle of the area, began a volume at 08:56 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, 8.9 hours before the alert went out and 65 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: 1109 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 323 m²/s²
0-3 km storm-relative helicity: 292 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.

878 
WWUS83 KLBF 090856
RFWLBF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE NORTH PLATTE NE
356 AM CDT SAT APR 9 2011

...CRITICAL FIRE WEATHER CONDITIONS TODAY...

.CONDITIONS THIS AFTERNOON WILL BE PRIME FOR EXTREME FIRE
BEHAVIOR...MAINLY IN LOCATIONS SOUTH OF THE INTERSTATE 80
CORRIDOR. A WARM FRONT ASSOCIATED WITH LOW PRESSURE OVER EASTERN
COLORADO WILL LIFT INTO CENTRAL NEBRASKA THROUGH THE DAY. THIS
WILL BRING ANOMALOUSLY WARM AIR INTO AREAS SOUTH OF THE
FRONT...WITH HIGHS AROUND OR EXCEEDING 80 DEGREES. IN THIS SAME
AREA...DRY AIR WILL ADVECT IN...WITH DEWPOINTS EXPECTED TO DROP
INTO THE UPPER TEENS AND 20S. THIS COMBINATION WILL BRING ABOUT
RELATIVE HUMIDITIES OF 10 TO 15 PERCENT. IN ADDITION...WINDS WILL
BLOW AT 15 TO 25 MPH WITH GUSTS TO 40 MPH.


NEZ210-219-092100-
/O.UPG.KLBF.FW.A.0003.110409T1800Z-110410T0600Z/
/O.NEW.KLBF.FW.W.0005.110409T1800Z-110410T0200Z/
FRENCHMAN BASIN-LOESS PLAINS-
356 AM CDT SAT APR 9 2011

...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM
CDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE
WEATHER ZONES 210 AND 219...

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A RED
FLAG WARNING...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO
9 PM CDT THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN
EFFECT. 

* AFFECTED AREA...IN NEBRASKA...FIRE WEATHER ZONE 210 FRENCHMAN 
  BASIN...FIRE WEATHER ZONE 219 LOESS PLAINS. 

* WIND...SOUTH TO SOUTHWEST WINDS AT 15 TO 25 MPH...WITH GUSTS
  UPWARDS OF 40 MPH.

* HUMIDITY...RELATIVE HUMIDITY VALUES OF 10 TO 15 PERCENT.

* IMPACTS...DANGEROUSLY DRY CONDITIONS AND STRONG WIND COULD
  CAUSE ANY FIRE TO QUICKLY GET OUT OF 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 WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

&&

$$

BROOKS

HTTP://WEATHER.GOV/NORTHPLATTE

1 follow-up statement

632 
WWUS83 KLBF 100212
RFWLBF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE NORTH PLATTE NE
912 PM CDT SAT APR 9 2011

...RED FLAG WARNING IS ALLOWED TO EXPIRE...

.THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE...AS THE CRITICAL
FIRE WEATHER CONDITIONS HAVE ENDED...HOWEVER LOCALLY GUSTY WINDS AND 
DRY CONDITIONS WILL PERSIST THROUGH THE REMAINDER OF THE EVENING.

NEZ210-219-100315-
/O.EXP.KLBF.FW.W.0005.000000T0000Z-110410T0200Z/
FRENCHMAN BASIN-LOESS PLAINS-
912 PM CDT SAT APR 9 2011

...RED FLAG WARNING HAS EXPIRED FOR GUSTY WINDS AND LOW HUMIDITY
FOR FIRE WEATHER ZONES 210 AND 219...

THE RED FLAG WARNING IS NO LONGER IN EFFECT. 

* AFFECTED AREA...IN NEBRASKA...FIRE WEATHER ZONE 210 FRENCHMAN 
  BASIN...FIRE WEATHER ZONE 219 LOESS PLAINS.

* WIND...SOUTHWEST WINDS AT 10 MPH WILL BECOME NORTHWEST AT 20
  WITH GUSTS TO 30 LATE THIS EVENING BEHIND A COLD FRONT.

* HUMIDITY...RELATIVE HUMIDITY VALUES WILL INCREASE TO ABOVE 50
  PERCENT BEHIND THE FRONT.

$$

TAYLOR

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
Apr 8, 9:03 PM MDT	Fire Weather Watch	LBF	Chase, Frontier, Hayes, Lincoln, Perkins	6 hr
Apr 9, 3:19 AM MDT	Dense Fog Advisory	LBF	Blaine, Custer, Garfield, Logan, Loup, McPherson and 2 more	3 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.