Severe Thunderstorm Warning 140, NWS North Platte, NE

177 
WWUS53 KLBF 202336
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
636 PM CDT MON JUN 20 2011

NEC071-183-202344-
/O.CAN.KLBF.SV.W.0140.000000T0000Z-110621T0000Z/
GARFIELD NE-WHEELER NE-
636 PM CDT MON JUN 20 2011

...THE SEVERE THUNDERSTORM WARNING FOR WHEELER AND EAST CENTRAL
GARFIELD COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR 
PROPERTY. HEAVY RAINFALL AND PEA SIZE HAIL CAN BE ANTICIPATED AS THE 
STORMS CONTINUE TO MOVE ACROSS EAST CENTRAL GARFIELD AND WHEELER 
COUNTIES. 

LAT...LON 4195 9887 4209 9845 4179 9829 4174 9845
TIME...MOT...LOC 2334Z 138DEG 17KT 4187 9853

$$

TLK

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORTH PLATTE NE
259 PM CDT MON JUN 20 2011

.SYNOPSIS...
H5 CLOSED LOW OVER EASTERN COLORADO AS SEEN IN WATER VAPOR. KLNX
RADAR LIGHTING UP AS SYSTEM MOVES SLOWLY EAST.

&&

.DISCUSSION...
FLASH FLOOD WATCH...SEVERE THUNDERSTORM WATCH AND TORNADO WATCH
ALREADY IN PLACE EARLY THIS AFTERNOON. MODELS HAVE MADE A SHIFT
WITH QPF FIELDS YET ONCE AGAIN. WITH RAPID INITIATION OF
CONVECTION THIS AFTERNOON AFTERNOON QPF FORECAST LOOKS REASONABLE.
WARM FRONT BEING DRAWN NORTHWARD INTO SOUTH CENTRAL NEBRASKA AS
UPPER JET AND LLJ INTENSIFY. STRONG WINDS TO DEVELOP ON BACKSIDE
OF SYSTEM WITH NORTHERLY FLOW JUST BELOW ADVISORY CRITERIA. AREAS
OF HEAVY RAIN TO DEVELOP AND COUNTIES THAT HAD EXCESSIVE AMOUNTS
OF RAINFALL LAST NIGHT WILL HAVE TO BE WATCHED FOR FLASH FLOOD
POTENTIAL TONIGHT. TEMPERATURES RECOVER SOME TUESDAY WITH UPPER
60S OVER NORTHERN NEBRASKA WHERE PRECIPITATION IS EXPECTED TO
CONTINUE THROUGH THE DAY. SYSTEM WILL PULL SLOWLY EAST WEDNESDAY
BUT MAY STILL SEE SOME ISOLATED LIGHT RAINSHOWERS. TEMPERATURES
REBOUND INTO THE LOWER 80S THROUGH THE WEEKEND AS UPPER RIDGE
BUILDS IN. WEAK SYSTEM MOVES ALONG THE CANADIAN BORDER THROUGH THE
WEEKEND AND MAY INDUCE SHOWERS ALONG A STALLED OUT SURFACE
BOUNDARY OVER WESTERN NEBRASKA. HAVE RETAINED SLIGHT CHANCES.

&&

.AVIATION...
MVFR/IFR CONDITIONS ARE EXPECTED TO REMAIN THROUGH THE OVERNIGHT
AS AN UPPER LEVEL LOW LIFTS THROUGH NEBRASKA. THUNDERSTORMS ARE
EXPECTED TO BECOME SCATTERED TO WIDESPREAD IN COVERAGE BY MID
AFTERNOON...WITH THE GREATEST POTENTIAL OF SEVERE WEATHER REMAINING
WELL TO THE EAST OF BOTH THE LBF AND VTN TERMINALS.
OTHERWISE...STRONG NORTHWESTERLY WINDS ARE EXPECTED TO DEVELOP LATER
TONIGHT AS THE UPPER LEVEL LOW LIFTS NORTHEAST.  GUSTS AOA 30KTS
WILL BE POSSIBLE AFTER 12Z TOMORROW...LASTING THROUGH THE TAF
FORECAST PERIOD.

&&

.HYDROLOGY...
A FLASH FLOOD WATCH IS IN EFFECT TODAY AND TONIGHT FOR AN ADDITIONAL
1 TO 2 INCHES OF RAINFALL.  HOWEVER WITHIN CONVECTIVE
STORMS...RAINFALL RATES OF UP TO TWO INCHES AN HOUR WILL BE
POSSIBLE.   THE MODELS ARE IN GOOD AGREEMENT LIFTING AN UPPER LEVEL
LOW FROM WEST CENTRAL KANSAS THROUGH CENTRAL NEBRASKA TONIGHT.
ELEVATED INSTABILITY CONTINUES THIS AFTERNOON AND INTO THIS EVENING
WITH POSITIVE CAPE VALUES OF 500 TO 1000 J/KG...MODEL SOUNDING
REVEAL THE PRESENCE OF LONG SKINNY CAPE...ALONG WITH K VALUES OF
GREATER THAN 35...ALL POINTING TO THE POTENTIAL OF HEAVY RAINFALL.
ALSO...WITH MODEL CONSENSUS PWATS OF GREATER THAN 1.40 INCHES
GENERALLY EAST OF HIGHWAY 61 /WHICH IS 2 SD ABOVE THE MEAN/ AND
FLASH FLOOD GUIDANCE LESS THAN AN INCH OVER REGIONS THAT RECEIVED
HEAVY RAIN LAST NIGHT...FLASH FLOOD WARNING WILL BE PROBABLE.

&&

.LBF WATCHES/WARNINGS/ADVISORIES...FLASH FLOOD WATCH THROUGH
TUESDAY MORNING FOR NEZ004>010-022>025-035>037-056>059-069>071-094.

TORNADO WATCH UNTIL 8 PM CDT THIS EVENING FOR NEZ010-027>029-038.

&&

SHORT TERM/EXTENDED...POWER
AVIATION...JACOBS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1220 PM CDT MON JUN 20 2011

NEZ004>010-022>029-035>038-056>059-069>071-094-211730-
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-
1220 PM CDT MON JUN 20 2011 /1120 AM MDT MON JUN 20 2011/

...FLASH FLOOD WATCH IN EFFECT FROM 7 AM CDT /6 AM MDT/ THIS
MORNING THROUGH TUESDAY MORNING...

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A MODERATE RISK OF SEVERE WEATHER IS EXPECTED THIS AFTERNOON AND
TONIGHT FOR AREAS EAST OF HIGHWAY 183. ELSEWHERE...A SLIGHT RISK
OF SEVERE WEATHER CAN BE EXPECTED.

THE STORM PREDICTION CENTER HAS ISSUED A PUBLIC SEVERE WEATHER
OUTLOOK TODAY FOR THE DEVELOPMENT OF TORNADOES...LARGE HAIL AND
DAMAGING WINDS FOR AREAS EAST OF HIGHWAY 183. SCATTERED SEVERE
STORMS CAPABLE OF LARGE HAIL ARE ALSO POSSIBLE WEST OF HIGHWAY 183
TO HIGHWAY 61.

SURFACE LOW PRESSURE ALONG WITH STRONG UPPER LEVEL SUPPORT WILL
PUSH NORTH NORTHEAST FROM CENTRAL KANSAS INTO CENTRAL NEBRASKA
LATER TODAY. MOISTURE WILL POOL JUST NORTH OF THE SURFACE LOW...WHILE
THE ATMOSPHERE BECOMES INCREASINGLY UNSTABLE BY MID AFTERNOON. GIVEN
FAVORABLE UPPER LEVEL WIND PROFILES...SEVERE STORMS APPEAR LIKELY
AFTER 22Z OVER CENTRAL AND NORTH CENTRAL NEBRASKA. AGAIN LARGE
HAIL AND DAMAGING WIND GUSTS WILL BE THE PRIMARY THREAT...HOWEVER
ISOLATED TORNADOES ARE POSSIBLE...ESPECIALLY FOR LOCATIONS EAST OF
HIGHWAY 183.

BESIDES THE SEVERE WEATHER POTENTIAL...ATMOSPHERIC MOISTURE
REMAINS HIGH ACROSS THE REGION. RAINFALL EFFICIENCY FROM STORMS
WILL BE HIGH. THUNDERSTORMS THAT DO DEVELOP WILL HAVE THE
POTENTIAL TO PRODUCE COPIOUS AMOUNTS OF RAINFALL...WHICH COULD
CAUSE FLOODING CONCERNS. RAINFALL OF 1 TO 3 INCHES IS POSSIBLE
FROM ANY CONVECTIVE STORM DEVELOPMENT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

A WIND ADVISORY MAY BE REQUIRED TUESDAY FOR NORTHWEST WINDS OVER
30 MPH.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY THIS AFTERNOON AND TONIGHT FOR
LOCATIONS EAST OF HIGHWAY 183...ELSEWHERE SPOTTER ACTIVATION MAY
BE REQUIRED.

&&

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

JACOBS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
505 PM CDT MON JUN 20 2011

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

0500 PM     HEAVY RAIN       PAXTON                  41.12N 101.36W
06/20/2011  M1.45 INCH       KEITH              NE   CO-OP OBSERVER

            COOPERATIVE OBSERVER MEASURED PRECIPITATION THAT HAS
            OCCURRED IN THE PAST 2 HOURS AND 45 MINUTES.

&&

CARMEL

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
530 PM CDT MON JUN 20 2011

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

0445 PM     HEAVY RAIN       12 SSE MASON CITY       41.06N 99.21W
06/20/2011  E1.35 INCH       CUSTER             NE   PUBLIC

            REPORTED 1.35 INCHES OF RAIN IN 30 MINUTES.

&&

JAHSENMA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
544 PM CDT MON JUN 20 2011

NEZ010-028-029-202330-
GARFIELD NE-HOLT NE-WHEELER NE-
544 PM CDT MON JUN 20 2011

...SIGNIFICANT WEATHER ADVISORY FOR WHEELER...SOUTHEASTERN HOLT AND
GARFIELD COUNTIES UNTIL 630 PM CDT...

AT 542 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 8 MILES NORTHEAST OF
SPALDING TO 5 MILES SOUTHWEST OF ERICSON TO 6 MILES WEST OF ELYRIA...
AND MOVING NORTH AT 35 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN.

THESE STORMS WILL BE NEAR...
ERICSON AROUND 550 PM CDT.
HIGHWAY 91 MILE MARKER 70 AND BURWELL AROUND 555 PM CDT.
BARTLETT AROUND 600 PM CDT.
HIGHWAY 11 MILE MARKER 100 AROUND 605 PM CDT.
FOUR CORNERS AROUND 615 PM CDT.
HIGHWAY 11 MILE MARKER 110 AROUND 625 PM CDT.
GOOSE LAKE STATE WILDLIFE MANAGEMENT AREA AND KNIEVELS CORNER AROUND
630 PM 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.

TLK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
604 PM CDT MON JUN 20 2011

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

0544 PM     NON-TSTM WND GST IMPERIAL                40.52N 101.64W
06/20/2011  M60.00 MPH       CHASE              NE   ASOS

&&

JAHSENMA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
606 PM CDT MON JUN 20 2011

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

0604 PM     HEAVY RAIN       5 SSE HERSHEY           41.09N 100.96W
06/20/2011  M3.28 INCH       LINCOLN            NE   CO-OP OBSERVER

&&

JAHSENMA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
606 PM CDT MON JUN 20 2011

NEZ057-058-069-070-210200-
KEITH-PERKINS-CHASE-HAYES-
INCLUDING THE CITIES OF...OGALLALA...GRANT...IMPERIAL...
HAYES CENTER
606 PM CDT MON JUN 20 2011 /506 PM MDT MON JUN 20 2011/

...STRONG WINDS EXPECTED THROUGH MID EVENING...

STRONG NORTHWESTERLY WINDS...WITH GUSTS OVER 50 MPH...ARE LIKELY
THROUGH 9 PM MDT. THESE WINDS ARE ASSOCIATED WITH A STRONG LOW
PRESSURE CENTER WHICH IS MOVING EAST INTO SOUTHEASTERN NEBRASKA.
PERSONS DRIVING IN FAR SOUTHWESTERN NEBRASKA AND THE SOUTHEASTERN
NEBRASKA PANHANDLE...SHOULD BE PREPARED FOR STRONG
CROSS WINDS...ESPECIALLY ON EAST TO WEST ROUTES.

CLB