Severe Thunderstorm Warning 159, NWS North Platte, NE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
326 PM CDT WED JUN 24 1998

FORECAST PROBLEMS ARE POPS AND TEMPERATURES

THE 18Z SURFACE ANALYSIS SHOWS LOW PRESSURE OVER LBF WITH A WARM FRONT
EXTENDING NORTHEAST INTO NORTHEAST NEBRASKA AND A DRYLINE EXTENDING
SOUTH INTO WESTERN KANSAS. DEWPOINTS WERE STILL IN THE 60S ACROSS MOST
OF THE FA WITH 70S IN THE NORTHEAST PART OF NEBRASKA. MUCH DRIER
DEWPOINTS WERE JUST SOUTH IN GLD. WATER VAPOR IMAGERY SHOWED A
SHORTWAVE OVER WESTERN COLORADO AND THUNDERSTORMS HAVE ALREADY FIRED
OVER GRANT COUNTY.

THE ETA MODEL IS PREFERRED SINCE THE NGM IS TOO FAR NORTH WITH THE
SURFACE LOW BY 24 HOURS. SURFACE LOW IS PROGGED BY ETA TO MOVE INTO
SOUTHCENTRAL NEBRASKA TONIGHT AND THEN INTO NORTHEAST NEBRASKA
THURSDAY. LOW REDEVELOPS TO THE WEST OVER NORTHWEST KANSAS THURSDAY
NIGHT AS UPPER TROUGH MOVES INLAND FROM THE PACIFIC NORTHWEST. SURFACE
LOW WILL MOVE INTO VTN AREA ON FRIDAY. SHORTWAVE WILL MOVE THROUGH FA
TONIGHT WITH A LULL ON THURSDAY. LATE THURSDAY NIGHT ANOTHER VORT WILL
MOVE INTO THE FA BUT 700 TEMPERATURES ARE VERY WARM EXCEPT FOR THE
PANHANDLE. SHORTWAVE WILL CONTINUE TO AFFECT FA ON FRIDAY. MOISTURE
WILL ALSO BE LACKING FOR THUNDERSTORM DEVELOPMENT WITH MEAN RH ONLY 30
PERCENT SO WILL WORD ISOLATED OR WIDELY SCATTERED.

WITH MOSTLY SUNNY SKIES AND WESTERLY WIND WILL GENERALLY GO WITH WARMER
FAN TEMPERATURES.

PRELIMINARY GUIDANCE FOR COORDINATION ONLY. OFFICIAL FORECASTS ARE
CONTAINED WITHIN PRODUCT OMAZFPNE...

CCF
LBF UU 061/093 063/097 064 1-2
OGA UU 060/093 062/096 063 --2
IML UU 061/094 063/097 065 --2
VTN UU 059/091 063/095 063 2-2
ONL UU 061/093 065/094 065 3--
ANW UU 060/092 064/094 064 3--
BBW UU 061/093 064/096 064 2--

FS

NEZ004>010-022>029-035>038-056>059-069>071-251200-

SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1133 AM CDT (1033 AM MDT) WED JUN 24 1998

THIS OUTLOOK PERTAINS TO THE FOLLOWING NEBRASKA COUNTIES...

ARTHUR     BLAINE     BOYD       BROWN      CHASE      CHERRY
CUSTER     DEUEL      FRONTIER   GARDEN     GARFIELD   GRANT
HAYES      HOLT       HOOKER     KEITH      KEYA PAHA  LINCOLN
LOGAN      LOUP       MCPHERSON  PERKINS    ROCK       SHERIDAN
THOMAS     WHEELER

...STORM SPOTTER ACTIVATION MAY BE NEEDED IN PARTS OF NORTH CENTRAL
NEBRASKA LATE THIS AFTERNOON AND TONIGHT...

THERE IS A SLIGHT CHANCE OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON
AND TONIGHT IN PARTS OF NORTH CENTRAL NEBRASKA. THE GREATEST RISK FOR
THUNDERSTORMS WILL BE EAST OF A VALENTINE...DUNNING AND BROKEN BOW LINE.
ISOLATED TO WIDELY SCATTERED THUNDERSTORMS WILL ALSO BE POSSIBLE
FURTHER WEST BUT STORMS WHICH DEVELOP ARE EXPECTED TO REMAIN BELOW
SEVERE LIMITS.

A SURFACE LOW WILL MOVE NORTHEAST INTO CENTRAL NEBRASKA TODAY WITH THE
ASSOCIATED WARM FRONT LIFTING NORTH. AREAS NORTH AND EAST OF THE LOW
CENTER WILL BECOME INCREASINGLY UNSTABLE DURING THE AFTERNOON AS SURFACE
HEATING INCREASES. THUNDERSTORMS SHOULD DEVELOP IN THE VICINITY OF THE
WARM FRONT LATE THIS AFTERNOON. A DISTURBANCE ALOFT WILL ALSO BE MOVING
ACROSS THE AREA AND SHOULD FURTHER INTENSIFY THE THUNDERSTORMS SO THAT A
FEW STORMS COULD REACH SEVERE LEVELS. ALTHOUGH SOME LARGE HAIL WILL BE
POSSIBLE...THE MAIN THREAT APPEARS TO BE DAMAGING WINDS SINCE AVAILABLE
MOISTURE IS LIMITED.

FS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
359 PM CDT WED JUN 24 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0345 PM    14 WSW MULLEN             NE   1.75 INCH HAIL
06/24/98   HOOKER

SLM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  NORTH PLATTE NE
359 PM CDT WED JUN 24 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0345 PM    14 WSW MULLEN             NE   1.75 INCH HAIL
06/24/98   HOOKER

SLM