Severe Thunderstorm Warning 50, NWS North Platte, NE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
330 AM CDT TUE JUN 1 2010

.DISCUSSION...
FORECAST CHALLENGE IS POPS TODAY AND CHANCE FOR SEVERE STORMS. AT
0731Z THE RADAR MOSAIC SHOWED A FEW STORMS NEAR THE GLD OFFICE
AND MOVING NORTHEAST. SHORT TERM MODELS SHOW A SPREAD IN POTENTIAL
QPF DEVELOPMENT NORTHEAST WITH THE RUC THE DRIEST. NEAR TERM
FORECAST FOLLOWS A MODEL BLEND WITH THE EXPECTATION THAT THE
CONVECTION OVER WCNTRL WILL CONTINUE TO DEVELOP NORTHEAST THROUGH
EARLY MORNING AS THE LOW LEVEL JET STRENGTHENS AND MOISTURE
CONTINUES TO SURGE NORTH.

AT 07Z THE SURFACE ANALYSIS SHOWED A SEMI STATIONARY FRONT ACROSS
THE DAKOTAS AND LEE TROUGH EXTENDING SOUTH ON THE HIGH PLAINS
THROUGH EASTERN COLORADO. A WARM FRONT EXTENDED SOUTHEAST FOR THE
LOW CENTER NEAR LHX TO ACROSS OK. SURFACE DEWPOINTS WERE INTO THE
LOWER 60S ACROSS SCNTRL NEB. THE H85 PROFILER WINDS HAVE VEERED
ONTO THE SOUTHWEST WITH HVLK1 SOUTH AT 30 KNOTS ATTM. THE
NORTHEAST TO SOUTHWEST CLOUD LINE VISIBLE EARLIER ON IR SATELLITE
IMAGERY HAS BECOME LESS DEFINED WHILE RADAR SHOWS BOUNDARY LIFTING
NORTHWEST ATTM. CONVECTION TO THE SOUTHWEST TO LIFT NORTH
NORTHEAST WITH BOUNDARY TO BECOME PRIMARY FOCUS FOR STORMS EARLY
THIS MORNING AS H7 SHORTWAVE TROUGH MOVES EAST. PRECIPITABLE WATER
RATIOS REACH AROUND AN INCH TODAY WITH STORMS THAT DO DEVELOP
CAPABLE OF PRODUCING HEAVY RAINFALL BY LATE AFTERNOON INTO THE
EVENING. BUFKIT SHOWS STRONG CAP THROUGH THE MORNING THEN STEADILY
ERODES THROUGH 4 PM AS INSTABILITY INCREASES WITH CAPE OVER 2000
J/KG AT KLBF. CONVECTION EARLY WILL BE ELEVATED WITH WIND AND
SMALL HAIL PRIMARY THREATS. THIS AFTERNOON AS CAP WEAKENS
STORMS SHOULD REDEVELOP WITH A FEW STRONG TO SEVERE THUNDERSTORMS IN
THE EVENING AS FRONT MOVES SOUTHEAST INTO CENTRAL NEBRASKA AND
FURTHER SOUTH INTO KANSAS AROUND MIDNIGHT. THE CHANCE FOR THE
STORMS LINGERS THROUGH THE NEAR TERM [WED INTO THU] AS ZONAL FLOW
ALOFT WILL CARRY A SERIES OF SHORTWAVE TROUGHS EAST. TIMING THE
SURFACE BOUNDARIES EAST WILL BE A CHALLENGE WITH LOW POPS ADJUSTED
THAT WILL NEED FURTHER ADJUSTMENTS AS FRONT THAT BACKS WEST TO THE
FRONT RANGE WEDNESDAY RETURNS NORTHEAST THURSDAY. THE UNSETTLED
PATTERN CONTINUES UNTIL SUNDAY WITH CHANCE OF STORMS DAILY UNTIL
THE UPPER RIDGE BUILDS EAST POSSIBLY MONDAY TO THE PLAINS. THE
H85 THERMAL RIDGE STRENGTHENS IN THE NEAR TERM WITH TEMPERATURES
TRENDED TOWARD WARMER GUI DANCES THROUGH DAY 5.

&&

.AVIATION...

BAND OF ACCAS TO THE SOUTHEAST HAS CONTINUED TO WARM IN IR IMAGERY.
WEAK BOUNDARY CONTINUES OVER SOUTHWEST NEBRASKA. ANOTHER AREA OF
COOLING TOPS OVER GOODLAND WITH LIGHTNING OVER SOUTHWEST KS. MODELS
IN GOOD AGREEMENT WITH WAVE MOVING ACROSS AROUND 12Z THIS AM. WILL
CONTINUE WITH TRW IN THE TAF AT KLBF AND A TEMPO AT KVTN. FOCUS WILL
BE NORTH CENTRAL THIS AFTERNOON IN THE KONL VCNTY WITH VFR CONDITIONS
OVER WESTERN NEBRASKA THIS EVENING.
&&

.LBF WATCHES/WARNINGS/ADVISORIES...NONE.
&&

SHORT TERM/EXTENDED...KECK
AVIATION...POWER

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORTH PLATTE NE
445 AM CDT TUE JUN 1 2010

NEZ004>010-022>029-035>038-056>059-069>071-094-020945-
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-
445 AM CDT TUE JUN 1 2010 /345 AM MDT TUE JUN 1 2010/

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

.DAY ONE...TODAY AND TONIGHT.
THUNDERSTORMS WILL CONTINUE OVER SOUTHWEST NEBRASKA THIS MORNING
WITH SOME OF THE STORMS DEVELOPING CAPABLE OF LARGE HAIL AND
STRONG DAMAGING WINDS...GENERALLY OVER SOUTHWEST NEBRASKA FROM
OGALLALA TO BRADY AND ALONG AND SOUTH OF INTERSTATE 80.

THUNDERSTORMS WILL REDEVELOP AGAIN LATE THIS AFTERNOON AND
EVENING. SOME STORMS MAY BECOME SEVERE EAST OF A LINE FROM
VALENTINE TO OGALLALA. LARGE HAIL AND DAMAGING THUNDERSTORM WINDS
WILL BE THE MAIN THREAT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

A FAST WEST TO EAST UPPER FLOW WILL CONTINUE OVER WESTERN AND
NORTH CENTRAL NEBRASKA THROUGH THE WEEK WITH THE CHANCE FOR
THUNDERSTORMS NEARLY EVERY DAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY.

&&

THIS PRODUCT IS NOW AVAILABLE...ALONG WITH OTHER WEATHER...
HYDROLOGICAL AND CLIMATOLOGICAL INFORMATION...AT
HTTP://WWW.WEATHER.GOV/NORTHPLATTE

MP

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
614 AM CDT TUE JUN 1 2010

NEZ059-071-011145-
FRONTIER NE-LINCOLN NE-
614 AM CDT TUE JUN 1 2010

...SIGNIFICANT WEATHER ADVISORY FOR FRONTIER AND SOUTHEASTERN LINCOLN
COUNTIES UNTIL 645 AM CDT...

AT 612 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 9 MILES NORTHEAST OF RED WILLOW RESERVOIR STATE
RECREATION AREA...OR 12 MILES SOUTH OF CURTIS...MOVING NORTHEAST AT
20 MPH.

HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM...ALONG
WITH HEAVY RAIN.

THIS STORM WILL BE NEAR...
STOCKVILLE AND CURTIS AROUND 645 AM CDT.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

JACOBS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
833 AM CDT TUE JUN 01 2010

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

0815 AM     HAIL             NENZEL                  42.93N 101.10W
06/01/2010  E1.00 INCH       CHERRY             NE   PUBLIC

&&

MPOWER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
846 AM CDT TUE JUN 01 2010

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

0845 AM     HAIL             3 SW NENZEL             42.90N 101.14W
06/01/2010  M1.00 INCH       CHERRY             NE   PUBLIC

            THE PUBLIC REPORTED ONE INCH HAIL SOUTH OF NENEL AROUND
            830 AM CDT.

&&

SJACOBS