Severe Thunderstorm Warning 91, NWS Omaha, NE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
310 PM CDT TUE JUN 13 2000

THUNDERSTORMS WILL CONT IN SHORT TERM...ENDING FIRST IN NWRN
ZONES...BUT PSBLY CONTG PAST 06Z SE.  SO MAIN PROBLEM IN SHORT TERM
IS TEMPS BHND FNT.  UPSTREAM AIRMASS FAIRLY COOL AND LOWS MAY BE A
LTL BLO GUID NWRN ZONES.  GENERALLY GOING FCST LOOKS OK.

BYND TNGT TEMPS MAIN FCST CONCERN ALTHO WINDS AND PCPN CHCS WED ALSO
WL POSE A PROBLEM.  NGM SFC WND FIELDS LOOK A LTL SUSPECT WED NGT
INTO THU AND IT WAS TOO FAST W/FRONT TDA SO WL DISCOUNT THAT MODEL.
GENERALLY WENT WITH ETA/MESOETA.  STG WINDS LOOK CERTAIN WED...SPCLY
NRN ZONES AS EARLY SPRING-LIKE SYS CLOSES OFF N OF STATE.  STILL
SOME WRAP AROUND CLDS/PCPN PSBL NRN ZONES AND ERN 1/2 OR SO OF CWA
HAS A LTL POS AREA ON ETAS FCST SOUNDING.  WL CONT SMALL POPS ACRS
CWA.  PREV FCST HIGHS LOOK GOOD.

W/COOL AIRMASS AND DECREASING WIND AND FEW CLDS WED NIGHT WL GO BLO
GUID WITH LOWS.  THEN FAIRLY STG WRM ADVCTN ON THU AHEAD OF
REINFORCING SHRTWV TROF.  THIS SHOULD BRING TEMPS ABV GUID MOST
AREAS ALONG WITH SOME CLOUD INCREASE.  WL NOT MENTION PCPN ATTM WITH
THIS WRM ADVCTN...THIS WL HAVE TO BE WATCHED.  TSTMS LOOK MORE
LIKELY INTO FIRST PART OF EXTENDED.

.OMA...NONE
CHERMOK

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-140300-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1115 AM CDT TUE JUN 13 2000

...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA...

STORM SPOTTERS WILL LIKELY BE NEEDED THIS AFTERNOON AND EARLY
TONIGHT ACROSS PARTS OF THE AREA.

VERY UNSTABLE AND MOIST AIR IS IN PLACE ACROSS EASTERN NEBRASKA AND
SOUTHWEST IOWA.  A COLD FRONT OVER CENTRAL NEBRASKA WILL ALSO MOVE
INTO SOUTHEAST NEBRASKA AND SOUTHWEST IOWA BY EVENING.  WHEN
COMBINED WITH SEVERAL STRONG UPPER LEVEL DISTURBANCES MOVING ACROSS THE
PLAINS...SEVERE THUNDERSTORMS ARE QUITE POSSIBLE.

ALTHOUGH THE THREAT OF SEVERE WEATHER EXISTS OVER MUCH OF EASTERN
NEBRASKA AND SOUTHWEST IOWA THROUGH EARLY TONIGHT...THE AREA WITH
THE GREATEST RISK IS ALONG AND SOUTHEAST OF A LINE FROM LINCOLN
NEBRASKA TO ONAWA IOWA.  THE TIME OF THE MAIN THREAT FOR EASTERN
NEBRASKA AND SOUTHWEST IOWA IS FROM 2 OR 3 PM UNTIL 11 PM OR SO
...EVEN THOUGH SEVERE STORMS ARE POSSIBLE THROUGH EARLY AFTERNOON
EAST OF THE REGION.  BY MID TO LATE EVENING THE STRONGEST STORMS
SHOULD HAVE SHIFTED INTO EXTREME SOUTHEAST NEBRASKA AND SOUTHWEST
IOWA AND LOCATIONS SOUTHEAST.

BASED ON THE DEGREE OF INSTABILITY...ALONG WITH FORCING AND EXPECTED
WIND FIELDS...THE THUNDERSTORMS WILL BE CAPABLE OF PRODUCING STRONG
DAMAGING WINDS AND HAIL.  A FEW TORNADOES CAN ALSO NOT BE RULED OUT.

PEOPLE ARE URGED TO BE ALERT FOR THREATENING WEATHER CONDITIONS AND
MONITOR NOAA WEATHER RADIO AND MEDIA OUTLETS FOR THE LATEST
FORECASTS. BE PREPARED FOR POSSIBLE SEVERE WEATHER WATCHES AkND
WARNINGS.

CHERMOK