Severe Thunderstorm Warning 184, NWS Goodland, KS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GOODLAND KS
300 PM MDT FRI JUL 31 2009

.DISCUSSION...
224 PM MDT FRI JUL 31 2009

FORECAST CONCERNS REVOLVE AROUND THE VERY SHORT TERM WITH THE
POSSIBILITIES OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON AND
OVERNIGHT.

DEWPOINTS IN THE 50S TO LOWER 60S ACROSS WESTERN KANSAS AND
SOUTHERN NEBRASKA WITH A STRENGTHENING LOW LEVEL JET AHEAD OF A
DEEPENING LEE SURFACE TROUGH ACROSS EASTERN COLORADO WILL CONTINUE
TO TRANSPORT MOISTURE INTO THE CENTRAL HIGH PLAINS. THIS WILL AID
IN THE DESTABILIZATION OF THE AIRMASS AS TEMPERATURES RISE WELL
INTO THE 80S THIS AFTERNOON AHEAD OF AN APPROACHING UPPER SHORT
WAVE TROUGH. EXPECT THUNDERSTORMS TO BE FOCUSED ALONG AND AHEAD OF
THE TROUGH AS IT MOVES EAST ACROSS THE FORECAST AREA LATE THIS
AFTERNOON AND THEN ALONG THE COLD FRONT THAT FOLLOWS OVERNIGHT.
HAIL AND WINDS ARE THE PRIMARY THREATS WITH A FEW TORNADOES
POSSIBLE WITH STRONGER STORMS NEAR THE THE BOUNDARIES WHERE SHEAR
VALUES ARE GREATER.

THROUGH THE REMAINDER OF THE FORECAST PERIOD...THE MEAN UPPER
TROUGH ACROSS THE NORTHEASTERN 2/3S OF THE U.S. WILL MOVE
FURTHER NORTH AND EAST BY THE MIDDLE OF NEXT WEEK AS THE PATTERN
TRANSITIONS TO A MEAN UPPER RIDGE OVER THE ROCKIES AND HIGH
PLAINS. THAT RIDGE AMPLIFIES AND TRANSITIONS TO THE PLAINS AS A
LOW PRESSURE CENTER MOVES ONSHORE OVER THE PACIFIC NORTHWEST AND
INTO SOUTHERN CANADA BY THE END OF NEXT WEEK.

WITH HIGH PRESSURE GENERALLY IN PLACE AT THE SURFACE ALONG WITH
THE RIDGE ALOFT...EXPECT DRY CONDITIONS WITH TEMPERATURES WARMING THROUGH
THE WEEKEND AND INTO THE MIDDLE OF NEXT WEEK. BY THE MIDDLE OF
NEXT WEEK THERE ARE SEVERAL IMPULSES THAT MOVE THROUGH THE UPPER
FLOW...TOPPING THE RIDGE AND MOVING THROUGH THE CENTRAL HIGH
PLAINS. THIS WILL LEAD TO A SLIGHT CHANCE OF THUNDERSTORMS EACH
AFTERNOON BETWEEN WEDNESDAY AND FRIDAY. HAVE ONLY BROAD-BRUSHED
THIS AS THE TIMING AND POSITION OF FEATURES COMES INTO BETTER
FOCUS AS THAT TIME PERIOD NEARS.

LOCKHART
&&

.AVIATION...
1115 AM MDT FRI JUL 31 2009

FOR THE 18Z TAF CYCLE...AFTERNOON AND EVENING CONVECTION WILL BE THE
PRIMARY AVIATION CONCERNS AT BOTH KMCK AND KGLD. THUNDERSTORMS
EXPECTED TO INITIATE ON THE HIGHER TERRAIN OF EASTERN COLORADO THIS
AFTERNOON AND MOVE EAST...SO KGLD MAY SEE THUNDERSTORMS THE
EARLIEST. CONVECTION SHOULD BE WIDESPREAD THIS EVENING AS COLD FRONT
MOVES THROUGH THE REGION ASSOCIATED WITH UPPER SHORTWAVE. A FEW
SEVERE STORMS POSSIBLE WITH LARGE HAIL/DAMAGING WINDS THE PRIMARY
HAZARDS.

024
&&

.GLD WATCHES/WARNINGS/ADVISORIES...
KS...NONE.
NE...NONE.
CO...NONE.
&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GOODLAND KS
228 PM MDT FRI JUL 31 2009

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-011200-
YUMA-KIT CARSON-CHEYENNE CO-CHEYENNE KS-RAWLINS-DECATUR-NORTON-
SHERMAN-THOMAS-SHERIDAN-GRAHAM-WALLACE-LOGAN-GOVE-GREELEY-WICHITA-
DUNDY-HITCHCOCK-RED WILLOW-
228 PM MDT FRI JUL 31 2009 /328 PM CDT FRI JUL 31 2009/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHWEST
NEBRASKA...NORTHWEST KANSAS AND EAST CENTRAL COLORADO.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING ACROSS THE ENTIRE AREA. DAMAGING WIND GUSTS AND HAIL WILL BE
THE MAIN SEVERE WEATHER THREATS...THOUGH A TORNADO OR TWO IS POSSIBLE
WITH ANY INTENSE/LONGER-LIVED SUPERCELLS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

LOW PROBABILITIES FOR THUNDERSTORMS WILL RETURN ON SUNDAY, MAINLY
EAST OF A LINE FROM MCCOOK TO TRIBUNE. ADDITIONAL LATE DAY AND
OVERNIGHT THUNDERSTORMS WILL BE POSSIBLE AROUND THE MIDDLE OF THE
WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY AND TONIGHT.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
542 PM MDT FRI JUL 31 2009

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

0525 PM     HAIL             17 NNW MAX              40.34N 101.53W
07/31/2009  E2.00 INCH       DUNDY              NE   TRAINED SPOTTER

            SPOTTER ALSO REPORTS 2-4 INCHES OF HAIL DEPTH, HIGH
            WINDS, AND VERY HEAVY RAINFALL RATE.

&&

GJG

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