Severe Thunderstorm Warning 128, NWS Hastings, NE

668 
WWUS53 KGID 060710
SVSGID

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
210 AM CDT SUN MAY 6 2012

NEC077-093-163-175-060730-
/O.CON.KGID.SV.W.0128.000000T0000Z-120506T0730Z/
GREELEY NE-HOWARD NE-SHERMAN NE-VALLEY NE-
210 AM CDT SUN MAY 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
VALLEY...SHERMAN...HOWARD AND GREELEY COUNTIES UNTIL 230 AM CDT...

AT 207 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
ROCKVILLE...OR 31 MILES NORTH OF KEARNEY...MOVING NORTHEAST AT 25
MPH.

LOCATIONS IMPACTED INCLUDE...
  ORD...LOUP CITY...ROCKVILLE...BOELUS...SHERMAN RESERVOIR DAM...
  ASHTON...FARWELL...ELBA...COTESFIELD...DANNEBROG...ST. PAUL...
  SCOTIA...NORTH LOUP...CUSHING...WOLBACH...GREELEY AND SPALDING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN HASTINGS.

&&

LAT...LON 4138 9828 4104 9840 4105 9912 4150 9897
      4174 9901 4175 9829
TIME...MOT...LOC 0710Z 240DEG 23KT 4114 9889
WIND...HAIL 60MPH 1.00IN

$$

HEINLEIN

804 
WWUS53 KGID 060721
SVSGID

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
221 AM CDT SUN MAY 6 2012

NEC077-093-163-175-060731-
/O.EXP.KGID.SV.W.0128.000000T0000Z-120506T0730Z/
GREELEY NE-HOWARD NE-SHERMAN NE-VALLEY NE-
221 AM CDT SUN MAY 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN VALLEY...SHERMAN...
HOWARD AND GREELEY COUNTIES WILL EXPIRE AT 230 AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH THIS 
THUNDERSTORM.

LAT...LON 4138 9828 4104 9840 4105 9912 4150 9897
      4174 9901 4175 9829
TIME...MOT...LOC 0721Z 240DEG 23KT 4118 9881

$$

HEINLEIN

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
1212 AM CDT SUN MAY 6 2012

.AVIATION...06Z KGRI TAF. THE MAIN CONCERN FOR THE TAF PERIOD THIS
EVENING WILL FOCUS ON A LINE OF SHOWERS AND THUNDERSTORMS EXPECTED
TO PUSH THROUGH THE TAF SITE OVERNIGHT. THESE STORMS ARE
INITIALIZING ALONG A FRONTAL BOUNDARY THAT WILL CONTINUE TO PUSH
EASTWARD THROUGH THE EARLY MORNING HOURS. EXPECTING THE ONSET OF
PRECIPITATION TO BEGIN AROUND THE 7Z TO 8Z TIME FRAME. SOME OF
THESE STORMS COULD POTENTIALLY BE STRONG TO SEVERE WITH LARGE HAIL
AND DAMAGING WIND GUSTS THE MAIN THREATS. LOWERED CEILINGS AND A
WIND SHIFT CAN ALSO BE EXPECTED WITH THE FRONTAL PASSAGE. WINDS
BEHIND THE FRONT ARE EXPECTED TO INCREASE TO NEAR 20 TO 25 KTS
WITH WIND GUSTS NEAR 30 KTS DURING THE AFTERNOON HOURS. SHOWERS
ARE EXPECTED TO LINGER THROUGH THE MORNING HOURS...HOWEVER...CLOUD
BASES SHOULD BEGIN TO LIFT THROUGHOUT THE DAY.

&&

.PREV DISCUSSION... /ISSUED 1058 PM CDT SAT MAY 5 2012/

UPDATE...UPDATED THE FORECAST TONIGHT FOR THE SEVERE THUNDERSTORM
WATCH IN EFFECT UNTIL 10Z.

PREV DISCUSSION... /ISSUED 831 PM CDT SAT MAY 5 2012/

UPDATE...DECIDED TO SEND AN UPDATE TO THE FORECAST TO SLOW THE
ONSET OF PRECIPITATION ACROSS THE SOUTHEASTERN QUADRANT OF THE
FORECAST AREA AS THE BEST CHANCE ACROSS THIS AREA NOW APPEARS TO
LATER IN THE EVENING AND DURING THE OVERNIGHT HOURS WHEN MAIN COLD
FRONT APPROACHES. OTHERWISE...NO CHANGES TO WESTERN FRINGES OF THE
FORECAST AREA WHERE A TORNADO WATCH REMAINS IN EFFECT UNTIL 11 PM
CDT.

UPDATE...UPDATED THE FORECAST THIS EVENING TO REFLECT THE
TORNADO WATCH ISSUED IN THE FAR NORTH AND WESTERN COUNTIES NEAR
AND JUST NORTHWEST OF THE STATIONARY BOUNDARY.

PREV DISCUSSION... /ISSUED 357 PM CDT SAT MAY 5 2012/

SHORT TERM...TONIGHT AND SUNDAY. MAIN FORECAST CONCERNS WILL BE
THUNDERSTORMS TONIGHT...PRECIPITATION SUNDAY AND WIND LATE TONIGHT
INTO SUNDAY.

A WARM FRONT HAS LIFTED TO THE NORTH THIS AFTERNOON AS OUTFLOW FROM
THUNDERSTORMS IN SOUTH DAKOTA MOVED SOUTH INTO NORTHERN NEBRASKA.
THE OUTFLOW KEPT THE WARM FRONT FROM ADVANCING AS FAR NORTH AS
INITIALLY THOUGHT. CURRENT SATELLITE SHOWS CLOUDS BEHIND THE
BOUNDARY WHICH IS HELPING TO CREATE DIFFERENTIAL HEATING IN THE
NORTH PART OF THE FORECAST AREA.

THE WARM FRONT IS EXPECTED TO MOVE BACK TO THE SOUTH THIS EVENING
AND TONIGHT AS AN UPPER LEVEL WAVE MOVES INTO THE AREA.
THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THE FRONT AS IT MOVES TO
THE SOUTH. THE LOCATION OF THE FRONT WHEN THE CONVECTION STARTS TO
FIRE WILL MAKE A DEFINITE IMPACT ON THE TIMING OF THE THUNDERSTORMS.
HAVE INCREASED POPS FURTHER TO THE SOUTH AND EARLIER THAN BEFORE AS
THE FRONT IS NOT AS FAR NORTH AS MODELS HAD IT. THE BEST CHANCE FOR
THUNDERSTORMS CONTINUES TO BE IN THE NORTHERN PART OF THE FORECAST
AREA TONIGHT...WITH LESSER CHANCES FURTHER TO THE SOUTH.

AFTER THE FRONT MOVES THROUGH THIS EVENING THE WINDS INCREASE BEHIND
THE FRONT. THERE IS A TIGHT PRESSURE GRADIENT AND WINDS ALOFT ARE 45
KNOTS SO EXPECT THAT THERE COULD BE STRONG WINDS TONIGHT. THE WINDS
ARE EXPECTED TO CONTINUE INTO THE MORNING...BUT BY AFTERNOON WILL
DIMINISH SLIGHTLY. THE STRONGEST WINDS WILL BE JUST BEHIND THE FRONT
FOR AN HOUR OR TWO.

THE UPPER LEVEL WAVE CONTINUES TO MOVE THROUGH THE AREA SUNDAY.
THERE IS A CHANCE FOR SHOWERS ACROSS THE AREA WITH THIS WAVE. THE
CAPE WILL BE REDUCED AND BY AFTERNOON THE CAPE IS ONLY AROUND 500
J/KG SO THERE COULD BE SOME ISOLATED THUNDERSTORMS...BUT MOSTLY JUST
SHOWERS.

LONG TERM...STARTING 00Z MONDAY...PRECIPITATION WILL BE COMING TO AN
END SUNDAY EVENING AS THE MAIN UPPER LEVEL TROUGH SHIFTS NORTHEAST
AND THE SURFACE FRONT WILL BE WELL SOUTHEAST OF THE LOCAL AREA. WITH
CLEARING SKIES EXPECTED BEHIND THESE FEATURES...TAPERED OFF POPS AND
ONLY LEFT A SLIVER OF CHANCES SUNDAY NIGHT ACROSS THE EASTERN TIER
OF COUNTIES...AND CORRESPONDINGLY COOLED OVERNIGHT LOWS A COUPLE OF
DEGREES.

THEREAFTER...EXTENDED MODELS IN GOOD AGREEMENT DEVELOPING A SPLIT
FLOW PATTERN ACROSS THE WESTERN US...WITH A CUTOFF LOW DEVELOPING
ACROSS THE DESERT SOUTHWEST AND OUR DEPARTED UPPER LEVEL TROUGH
TRACKING ACROSS THE ACROSS THE NORTHERN GREAT LAKES. THIS WILL LEAVE
THE LOCAL AREA IN A LIGHT NORTHWESTERLY FLOW BETWEEN THE TWO
SYSTEMS...WITH A COOLER AIRMASS IN PLACE. WITH LITTLE INSTABILITY OR
FORCING MECHANISMS TO WORK WITH...EXPECT A DRY AND FAIR EARLY FIRST
HALF OF THE WEEK...WITH PLEASANT AND SEASONABLE TEMPERATURES.

EXPECT A CHANGE IN THE PATTERN LATE IN THE FORECAST PERIOD...AS
NORTHWESTERLY FLOW ALOFT BECOMES MORE ZONAL AS THE UPPER LEVEL LOW
ACROSS THE SOUTHWEST TRACKS ACROSS THE SOUTHERN PLAINS. AT THE SAME
TIME...A WELL DEFINED FRONT IS FORECAST TO APPROACH THE LOCAL AREA
FROM THE NORTHWEST...BRINGING A RETURN TO BETTER CHANCES FOR SHOWER
AND THUNDERSTORM ACTIVITY TO THE LOCAL AREA LATE THURSDAY NIGHT OR
FRIDAY. AT THIS TIME...INSTABILITY LOOKS FAIRLY MEAGER WITH THIS
FRONT...BUT SHOULD BE ENOUGH TO HELP GENERATED AT LEAST ISOLATED
STORMS OVER THE THURSDAY NIGHT THROUGH FRIDAY NIGHT TIME PERIOD.

&&

.GID WATCHES/WARNINGS/ADVISORIES...
NE...NONE.
KS...NONE.
&&

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE HASTINGS NE
1110 PM CDT SAT MAY 5 2012

KSZ005>007-017>019-NEZ039>041-046>049-060>064-072>077-082>087-
061200-
PHILLIPS-SMITH-JEWELL-ROOKS-OSBORNE-MITCHELL-VALLEY-GREELEY-NANCE-
SHERMAN-HOWARD-MERRICK-POLK-DAWSON-BUFFALO-HALL-HAMILTON-YORK-
GOSPER-PHELPS-KEARNEY-ADAMS-CLAY-FILLMORE-FURNAS-HARLAN-FRANKLIN-
WEBSTER-NUCKOLLS-THAYER-
1110 PM CDT SAT MAY 5 2012

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

.DAY ONE...TONIGHT.

SEVERE THUNDERSTORMS WILL AFFECT MUCH OF THE OUTLOOK AREA
OVERNIGHT...ESPECIALLY FOR LOCATIONS NORTH OF HIGHWAY 6 IN SOUTH
CENTRAL NEBRASKA. VERY LARGE HAIL OF GOLF BALL SIZE OR
GREATER...DAMAGING WINDS OF 60 MPH AND ISOLATED TORNADOES ARE ALL
POSSIBLE FROM THE STORMS. IN ADDITION...VERY HEAVY RAINFALL
AMOUNTS IN EXCESS OF AN INCH MAY CAUSE LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

ISOLATED NON SEVERE THUNDERSTORMS ARE POSSIBLE ON SUNDAY...THEN
THUNDERSTORMS ARE FORECAST AGAIN FROM THURSDAY NIGHT INTO FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS EVENING AND TONIGHT
FOR LOCATIONS NORTH OF A LINE FROM ELWOOD NEBRASKA TO MANKATO KANSAS.

&&

MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING WEB PAGE:
   HTTP://WWW.WEATHER.GOV/HASTINGS  (ALL LOWERCASE)