Alert archive / Nebraska / Red Flag Warnings in 2011

Red Flag Warning 7, NWS North Platte, NE

May 6, 20115 counties in Nebraska

NWS North Platte, NE issued this red flag warning at May 6, 2011, 2:35 AM MDT for 5 counties in Nebraska. It took effect at May 6, 2011, 11:00 AM 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: May 6, 2011, 2:35 AM MDT (08:35 UTC)
In effect from: May 6, 2011, 11:00 AM MDT
Expired: May 6, 2011, 6:06 PM MDT
In force: 7 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 08:35 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, 8.6 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: 3351 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 118 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.

823 
WWUS83 KLBF 060835
RFWLBF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE NORTH PLATTE NE
335 AM CDT FRI MAY 6 2011

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

.THE COMBINATION OF VERY DRY AIR DOWN SLOPING ACROSS SOUTHWEST NEBRASKA
AND NORTHWEST WINDS INCREASING TO 15 TO 25 MPH WILL CREATE RED
FLAG CONDITIONS. NORTHWEST WINDS AND TEMPERATURES WILL GRADUALLY
INCREASE THIS MORNING. VERY DRY AIR WILL MOVE OUT OF WYOMING AND
THROUGH SOUTHWEST NEBRASKA DURING THE AFTERNOON PRODUCING CRITICAL
FIRE DANGER.

NEZ210-219-070200-
/O.NEW.KLBF.FW.W.0007.110506T1700Z-110507T0200Z/
FRENCHMAN BASIN-LOESS PLAINS-
335 AM CDT FRI MAY 6 2011

...RED FLAG WARNING IN EFFECT FROM NOON TODAY 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 NOON TODAY TO 9 PM CDT
THIS EVENING. 

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

* WIND...NORTHWEST 15 TO 25 MPH WITH A FEW GUSTS TO 30 MPH.

* HUMIDITY...FALLING TO BETWEEN 10 AND 15 PERCENT.

* IMPACTS...DANGEROUSLY DRY FUELS...STRONG NORTHWEST WIND AND LOW
  HUMIDITY WILL 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.

&&

$$


HTTP://WEATHER.GOV/NORTHPLATTE

1 follow-up statement

095 
WWUS83 KLBF 070006
RFWLBF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE NORTH PLATTE NE
706 PM CDT FRI MAY 6 2011

...CRITICAL FIRE DANGER ENDING ACROSS SOUTHWESTERN NEBRASKA...


NEZ210-219-070115-
/O.CAN.KLBF.FW.W.0007.000000T0000Z-110507T0200Z/
FRENCHMAN BASIN-LOESS PLAINS-
706 PM CDT FRI MAY 6 2011

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

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

CRITICAL FIRE DANGER HAS ENDED ACROSS SOUTHWESTERN NEBRASKA.
RELATIVE HUMIDITY'S HAVE RECOVERED TO 20 TO 30 PERCENT OVER THE
PAST HOUR AND WILL RECOVER FURTHER TO AROUND 70 PERCENT OVERNIGHT.
NORTHERLY WINDS OF 10 TO 15 MPH WILL BECOME LIGHT AND VARIABLE
DIMINISHING TO UNDER 10 MPH OVERNIGHT. 

$$


HTTP://WEATHER.GOV/NORTHPLATTE

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.