Severe Thunderstorm Warning 73, NWS North Platte, NE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
318 AM CDT SAT JUN 21 1997

FORECAST PROBLEMS...POPS AND TEMPERATURES

06Z SURFACE ANALYSIS SHOWS LOW PRESSURE OVER SOUTHEAST COLORADO WITH
FRONT ALIGNED SOUTHWEST TO NORTHEAST ACROSS CENTRAL NEBRASKA FROM
OGA TO EAST OF ONL. UPSLOPE CREATING LOW CLOUDS OVER BFF AND VTN.
SATELLITE SHOWING LARGE AREA OF OVERCAST OVER FA DUE TO THUNDERSTORM
COMPLEX.

MODELS INDICATE 500MB FLOW TO BECOME LESS ZONAL BY END OF PERIOD
WITH A TROUGH MOVING INTO THE WESTERN U.S. ON SUNDAY. STATIONARY
FRONT WILL MOVE NORTHWARD ACROSS STATE TODAY AND TONIGHT WITH LOW
PRESSURE OVER WESTERN KANSAS. ISENTROPIC LIFT AND Q-G FORCING
BULLS EYE OVER PANHANDLE BY 00Z SUNDAY FOR ANOTHER ROUND OF
THUNDERSTORMS TONIGHT. ON SUNDAY...SCATTERED THUNDERSTORMS
AGAIN WITH MAIN FOCUS FURTHER NORTH OVER PANHANDLE AND NORTHCENTRAL
WHERE LOW IS CENTERED OVER SOUTHWEST SOUTH DAKOTA AND FRONTS INTERSECT.
KLNX RADAR INDICATE SHOWERS AND THUNDERSTORMS CONTINUE OVER
CHASE...HAYES...FRONTIER AND SOUTHEAST LINCOLN AND CUSTER COUNTIES.
ALSO SHOWERS MOVING IN FROM THE WEST TOWARD OGA AND JUST NORTH
OF CHERRY COUNTY IN SOUTH DAKOTA. WOULD GO WITH MORNING PERIOD FOR
SHOWERS AND THUNDERSTORMS SOUTHWEST NEBRASKA AND NORTHCENTRAL.
SHOWERS AND THUNDERSTORMS OVER SOUTHERN SOUTH DAKOTA COULD EASILY
SHIFT SOUTH INTO THE NORTHERN COUNTIES. SKY SHOULD BECOME PARTLY
SUNNY THIS AFTERNOON.

WINDS SHOULD BE NORTHEAST 5-15 6TODAY. TONIGHT...EAST 5-10 AND THEN
BECOMING SOUTH 10-20 WITH THE LOW IN SOUTH DAKOTA.

LBF BU 082/063 089/063 241      ONL BU 083/064 089/063 242
IML BU 082/062 089/062 241      VTN BU 079/063 086/062 243
OGA BU 083/063 090/063 241

FS

NEZ004>010-022>029-035>038-056>059-069>071-221200-

SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA
NATIONAL WEATHER SERVICE NORTH PLATTE NE
721 AM CDT SAT JUN 21 1997

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 GROUPS IN WESTERN AND NORTH CENTRAL NEBRASKA
SHOULD BE ALERT AND READY FOR ACTIVATION LATE THIS AFTERNOON AND THIS
EVENING...

THERE IS A SLIGHT CHANCE OF SEVERE THUNDERSTORMS THIS AFTERNOON
AND THIS EVENING OVER PORTIONS OF WESTERN AND NORTH CENTRAL NEBRASKA.
THE GREATEST RISK OF SEVERE WEATHER IS SOUTH OF A LINE FROM RUSHVILLE TO
MULLEN TO ONEILL.

A STATIONARY FRONT WILL BE POSITIONED ACROSS WESTERN AND NORTH CENTRAL
NEBRASKA THIS AFTERNOON AND WILL FOCUS ABUNDANT MOISTURE IN THE AREA.
WITH SUFFICIENT AFTERNOON HEATING THE ATMOSPHERE HAS THE POTENTIAL TO
BECOME VERY UNSTABLE. THUNDERSTORMS WHICH DEVELOP THIS AFTERNOON ALONG
THE FRONT COULD BECOME SEVERE WITH THE MAIN THREAT BEING DAMAGING WINDS
AND LARGE HAIL.

FS

NEZ004>010-022>029-035>038-056>059-069>071-221200-

SEVERE WEATHER OUTLOOK FOR WESTERN AND NORTH CENTRAL NEBRASKA
NATIONAL WEATHER SERVICE NORTH PLATTE NE
721 AM CDT SAT JUN 21 1997

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 GROUPS IN WESTERN AND NORTH CENTRAL NEBRASKA
SHOULD BE ALERT AND READY FOR ACTIVATION LATE THIS AFTERNOON AND THIS
EVENING...

THERE IS A SLIGHT CHANCE OF SEVERE THUNDERSTORMS THIS AFTERNOON
AND THIS EVENING OVER PORTIONS OF WESTERN AND NORTH CENTRAL NEBRASKA.
THE GREATEST RISK OF SEVERE WEATHER IS SOUTH OF A LINE FROM RUSHVILLE TO
MULLEN TO ONEILL.

A STATIONARY FRONT WILL BE POSITIONED ACROSS WESTERN AND NORTH CENTRAL
NEBRASKA THIS AFTERNOON AND WILL FOCUS ABUNDANT MOISTURE IN THE AREA.
WITH SUFFICIENT AFTERNOON HEATING THE ATMOSPHERE HAS THE POTENTIAL TO
BECOME VERY UNSTABLE. THUNDERSTORMS WHICH DEVELOP THIS AFTERNOON ALONG
THE FRONT COULD BECOME SEVERE WITH THE MAIN THREAT BEING DAMAGING WINDS
AND LARGE HAIL.

FS