Severe Thunderstorm Warning 371, NWS North Platte, NE

000 
WWUS53 KLBF 101732
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1231 PM CDT FRI AUG 10 2007

NEC015-089-101745-
/O.CON.KLBF.SV.W.0371.000000T0000Z-070810T1745Z/
HOLT NE-BOYD NE-
1231 PM CDT FRI AUG 10 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM CDT
FOR SOUTHEASTERN BOYD AND NORTHEASTERN HOLT COUNTIES...

AT 1227 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR REDBIRD STATE WILDLIFE MANANGEMENT
AREA...OR ABOUT 19 MILES SOUTHEAST OF SPENCER...MOVING SOUTHEAST AT
25 MPH.

AT 1228 PM CDT...HALF DOLLAR SIZE HAIL WAS REPORTED SOUTHEAST OF 
LYNCH IN BOYD COUNTY. 

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 4293 9850 4276 9866 4254 9831 4285 9832

$$

13

000 
WWUS53 KLBF 101738
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1238 PM CDT FRI AUG 10 2007

NEC015-089-101748-
/O.CAN.KLBF.SV.W.0371.000000T0000Z-070810T1745Z/
HOLT NE-BOYD NE-
1238 PM CDT FRI AUG 10 2007

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BOYD AND
NORTHEASTERN HOLT COUNTIES IS CANCELLED...

THE STORM WHICH HAD PROMPTED THE WARNING HAD MOVE EAST OF THE 
COUNTIES AND NO LONGER POSED AN IMMEDIATE THREAT. ADDITIONAL 
THUNDERSTORMS...SOME OF WHICH MAY BECOME SEVERE...WILL BE POSSIBLE 
LATER THIS AFTERNOON AND EVENING. 

LAT...LON 4293 9850 4276 9866 4254 9831 4285 9832

$$

13

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
344 AM CDT FRI AUG 10 2007

.SYNOPSIS...
RADAR COMPOSITE SHOWS CONVECTION SPREADING INTO THE PANHANDLE
ZONES. ACROS THE NORTHEAST...STRONG CONVECTION IS ONGOING. AT THE
SURFACE...DEWPOINTS IN THE WEST ARE IN THE 40S WITH 60S IN THE
EAST. A SURFACE TROUGH EXTENDS THROUGH THE PANHANDLE. VAD WIND
PROFILER AND REGIONAL PROFILERS INDICATE A LLJET OF 35-45KT. WATER
VAPOR PLACES A LOW WORKING ONSHORE IN NORTHWEST WA AND A RIBBON OF
SUBTROPICAL MOISTURE EXTENDING FROM MEXICO INTO CENTRAL AND
EASTERN NEB.

&&

.DISCUSSION...
DRYLINE/TROUGH PUSHES EAST TODAY. MODELS NOT CLEAR ON INTIATION
ALONG THE TROUGH. HAVE GONE WITH THE NAM AND SREF. SOUNDINGS
INDICATE STORMS ACROSS THE WEST WILL HAVE THE POTENTIAL TO PRODUCE
GUSTY WINDS IN HIGH BASED ACTIVITY. HOT TEMPS AND DEEP MIXING ARE
EXPECTED. FOR THE WEEKEND...IDEA IS THAT THE UPPER RIDGE WILL BE
CENTERED OVER THE CENTRAL CONUS. HOT ON SATURDAY GENERALLY AROUND
100. WITH THE SURFACE TROUGH THROUGH...MOISTURE SHOULD BE LIMITED
AND HAVE MAINTAINED THE DRY FORECAST. LOW LEVEL FLOW BECOMES
EASTERLY ON SUNDAY WITH COOLER TEMPS WITH MORE HUMIDIY. WARM FRONT
DEVELOPS AND CONVECTION IS EXPECTED ON THE PERIFERY OF THE UPPER
RIDGE. BOTH THE NAM AND GFS ARE ON BOARD WITH THIS. FOR THE
REMAINDER OF THE FORECAST...CONTINUED HOT UNTIL A POSSIBLE COLD
FRONT MID WEEK. 18Z GFS WAS A BIT MORE PROMISING AS THE DRIVING
FORCE WILL BE AN UPPER LOW CURRENTLY OVER THE NORTHWEST
TERRITORIES. 18Z RUN BROUGHT 540 THICKNESSES INTO CENTRAL SK AND
MB. 00Z GFS IS A BIT FURTHER NORTH AND QUICKER EAST.

&&

.AVIATION...
TRW- TO CONTINUE OVER NORTHERN NEBRASKA THROUGH THE EARLY MORNING
HOURS. TRW- EXPECTED TO DEVELOP OVER EASTERN NEBRASKA PANHANDLE
THROUGH NORTH CENTRAL NEBRASKA LATE THIS AFTERNOON AND THIS EVENING.

&&

.FIRE WEATHER...
A RED FLAG WARNING WILL BE ISSUED FOR THE WESTERN FIRE WEATHER
ZONE. SHERIDAN COUNTY IS THE MOST FAVORED. RH VALUES THERE MAY
DROP TO 10-12 PERCENT. WINDS ARE MARGINAL...BUT WITH MIXING ABOVE
H6...GUSTY CONDITIONS CANNOT BE RULED OUT. IN
ADDITION...TS WILL BE CAPABLE OF PRODUCING EVEN STRONGER
GUSTS...ALONG WITH LITTLE RAIN AND LIGHTNING STRIKES.

&&

.LBF WATCHES/WARNINGS/ADVISORIES...
RED FLAG WARNING FROM 10 AM THIS MORNING TO 9 PM MDT THIS
EVENING FOR NEZ204.

&&

JMC/POWER

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1041 AM CDT FRI AUG 10 2007

NEZ004>010-022>029-035>038-056>059-069>071-094-111200-
SHERIDAN-EASTERN CHERRY-KEYA PAHA-BOYD-BROWN-ROCK-HOLT-GARDEN-
GRANT-HOOKER-THOMAS-BLAINE-LOUP-GARFIELD-WHEELER-ARTHUR-MCPHERSON-
LOGAN-CUSTER-DEUEL-KEITH-PERKINS-LINCOLN-CHASE-HAYES-FRONTIER-
WESTERN CHERRY-
1041 AM CDT FRI AUG 10 2007 /941 AM MDT FRI AUG 10 2007/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN AND
NORTH CENTRAL NEBRASKA.

.DAY ONE...TODAY AND TONIGHT.

THUNDERSTORM DEVELOPMENT WILL BE POSSIBLE THROUGH THE AFTERNOON
AND EVENING HOURS ACROSS PORTIONS OF WESTERN AND NORTH CENTRAL
NEBRASKA. THE AREA OF CONCERN WILL BE MAINLY NORTH OF INTERSTATE
80. SEVERE THUNDERSTORM DEVELOPMENT WILL BE POSSIBLE WITH WIND
GUSTS OVER 60 MPH AND LARGE HAIL THE MAIN THREATS.

DRY...WINDY CONDITIONS COMBINED WITH THE POSSIBLY OF THUNDERSTORMS
WITH LITTLE RAINFALL THIS AFTERNOON AND THIS EVENING WILL CREATE
DANGEROUS FIRE WEATHER CONDITIONS OVER WESTERN NEBRASKA...WEST OF
A LINE FROM HYANNIS TO OGALLALA.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

HOT AND DRY CONDITIONS WILL PERSIST THROUGH THE WEEKEND OVER
WESTERN NEBRASKA WHERE THE FIRE WEATHER THREAT WILL CONTINUE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT.

&&

THIS PRODUCT IS NOW AVAILABLE...ALONG WITH OTHER WEATHER...
HYDROLOGICAL AND CLIMATE INFORMATION...AT
HTTP://WWW.CRH.NOAA.GOV/LBF(ALL LOWERCASE)

13

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
754 AM CDT FRI AUG 10 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0740 PM     TSTM WND GST     BUTTE                   42.91N 98.85W
08/09/2007  E60 MPH          BOYD               NE   CO-OP OBSERVER

            4 TO 6 INCH DIAMETER TREE LIMBS DOWN IN BUTTE.

&&

BTAYLOR