Alert archive / Nebraska / Red Flag Warnings in 2012

Red Flag Warning 19, NWS North Platte, NE

May 18, 20124 counties in Nebraska

NWS North Platte, NE issued this red flag warning at May 18, 2012, 9:54 AM MDT for 4 counties in Nebraska. It was in force for 10 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: May 18, 2012, 9:54 AM MDT (15:54 UTC)
Expired: May 18, 2012, 8:00 PM MDT
In force: 10 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 15:53 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, 3.9 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.

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: 2219 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 99 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.

394 
WWUS83 KLBF 181554
RFWLBF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1054 AM CDT FRI MAY 18 2012

...CRITICAL FIRE DANGER THIS AFTERNOON AND EVENING...

.LOW PRESSURE WILL DEEPEN ACROSS NORTHEAST COLORADO AND HOT DRY
AIR WILL SURGE EAST OUT OF COLORADO AND INTO SOUTHWEST NEBRASKA
FORMING A DRY LINE. GUSTY WINDS WILL DEVELOP ALONG THE DRYLINE.

NEZ210-190200-
/O.NEW.KLBF.FW.W.0019.120518T1554Z-120519T0200Z/
FRENCHMAN BASIN-
1054 AM CDT FRI MAY 18 2012

...RED FLAG WARNING IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR
WIND AND LOW RELATIVE HUMIDITY FOR THE FRENCHMAN BASIN...

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A RED
FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN
EFFECT UNTIL 9 PM CDT THIS EVENING.

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

* WINDS...SOUTH 15 TO 25 MPH WITH GUSTS UP TO 35 MPH.

* RELATIVE HUMIDITY...AS LOW AS 15 PERCENT.

* IMPACTS...ISOLATED THUNDERSTORMS MAY DEVELOP LATE THIS AFTERNOON
  AND THIS EVENING ADDING TO THE DANGER.

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

230 
WWUS83 KLBF 190208
RFWLBF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE NORTH PLATTE NE
908 PM CDT FRI MAY 18 2012

...RED FLAG WARNING FOR SOUTHWEST NEBRASKA ALLOWED TO EXPIRE...

NEZ210-190315-
/O.EXP.KLBF.FW.W.0019.000000T0000Z-120519T0200Z/
FRENCHMAN BASIN-
908 PM CDT FRI MAY 18 2012

...RED FLAG WARNING HAS EXPIRED FOR SOUTHWEST NEBRASKA...

RELATIVE HUMIDITY CONTINUES TO INCREASE ACROSS THE AREA THIS
EVENING. THE FIRE WEATHER THREAT HAS EASED. 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.