Alert archive / Nebraska / Red Flag Warnings in 2007

Red Flag Warning 7, NWS North Platte, NE

November 4, 200719 counties in Nebraska

NWS North Platte, NE issued this red flag warning at Nov 4, 2007, 11:33 AM MST for 19 counties in Nebraska. It was in force for 5 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
Nov 4, 2007, 11:33 AM MST (18:33 UTC)
Expired
Nov 4, 2007, 5:00 PM MST
In force
5 hr
Issued by
NWS North Platte, NE

Counties Arthur County, NE, Blaine County, NE, Brown County, NE, Chase County, NE, Cherry County, NE, Deuel County, NE, Frontier County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hooker County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Perkins County, NE, Rock County, NE, Sheridan County, NE, Thomas County, NE

The radar

The North Platte radar (KLNX), 64 km from the middle of the area, began a volume at 18:38 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, 6.6 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 12:00Z on 2007-11-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 12:00Z on 2007-11-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 319 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2359 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
319 m²/s²
0-3 km storm-relative helicity
381 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.

000 
WWUS83 KLBF 041833
RFWLBF

RED FLAG WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1233 PM CST SUN NOV 4 2007

.MUCH ABOVE NORMAL TEMPERATURES ARE LEADING TO RELATIVE HUMIDITY
LEVELS BELOW 15 PERCENT ACROSS MUCH OF WESTERN NEBRASKA. STRONG
WESTERLY WIND OFF THE HIGHER TERRAIN TO THE WEST...WITH GUSTS OVER
30 MPH...IS LEADING TO CRITICAL FIRE WEATHER CONDITIONS. THIS
SHOULD CONTINUE TO

NEZ204-206-210-219-050000-
/O.NEW.KLBF.FW.W.0007.071104T1833Z-071105T0000Z/
EASTERN PANHANDLE/CRESCENT LAKE NWR-
SANDHILLS/VALENTINE NWR/NEBRASKA NATIONAL FOREST/
SAMUEL R MCKELVIE NATIONAL FOREST-FRENCHMAN BASIN-LOESS PLAINS-
1233 PM CST SUN NOV 4 2007 /1133 AM MST SUN NOV 4 2007/

...RED FLAG WARNING IN EFFECT UNTIL 6 PM CST /5 PM MST/ THIS
AFTERNOON FOR LOW RELATIVE HUMIDITY AND GUSTY WINDS...

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A RED
FLAG WARNING...WHICH IS IN EFFECT UNTIL 6 PM CST /5 PM MST/ THIS
AFTERNOON. 

RELATIVE HUMIDITY LEVELS HAVE DROPPED TO THE LOWER TEENS ACROSS
PORTIONS OF WESTERN NEBRASKA AND WITH TEMPERATURES CLIMBING INTO
THE MID 70S THESE READINGS MAY BOTTOM OUT IN THE SINGLE DIGITS.
WESTERLY WINDS ARE IN THE 15 TO 25 MPH RANGE OVER THE AREA WITH
SOME GUSTS OVER 30 MPH BEING REPORTED. CRITICAL FIRE WEATHER
CONDITIONS SEEM LIKELY THROUGH THE LATE AFTERNOON HOURS. WITH MANY
OUTDOOR ACTIVITIES POSSIBLE DURING THIS TIME OF YEAR...INCLUDING
RECREATION AND AGRICULTURE...FIRE STARTS MAY BE POSSIBLE.

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.

$$

13
1 follow-up statement
000 
WWUS83 KLBF 050000
RFWLBF

RED FLAG WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
600 PM CST SUN NOV 4 2007

...RED FLAG WARNING CANCELLED...


NEZ204-206-210-219-050100-
/O.CAN.KLBF.FW.W.0007.000000T0000Z-071105T0000Z/
EASTERN PANHANDLE/CRESCENT LAKE NWR-
SANDHILLS/VALENTINE NWR/NEBRASKA NATIONAL FOREST/
SAMUEL R MCKELVIE NATIONAL FOREST-FRENCHMAN BASIN-LOESS PLAINS-
600 PM CST SUN NOV 4 2007 /500 PM MST SUN NOV 4 2007/

...RED FLAG WARNING IS CANCELLED...

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

WINDS HAD DECREASED THIS EVENING AND RELATIVE HUMIDITIES WERE
INCREASING ACROSS WESTERN NEBRASKA. THE RED FLAG WARNING IS
CANCELLED.

$$

POWER

Nearby

Red Flag Warnings in Nebraska, 2007Every red flag warning in 2007

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.