Special Weather Statement, NWS Grand Forks, ND

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND FORKS ND
1137 PM CDT MON JUL 8 2013

.UPDATE...
ISSUED AT 1137 PM CDT MON JUL 8 2013

SEVERE TSTM WATCH 403 STILL IN EFFECT UNTIL 4 AM CDT. HOWEVER WFO
BIS ONLY HAS 1 WARNING STILL IN EFFECT AND IT APPEARS THE STRONGER
CELLS NOW ARE DOWN AROUND MOBRIDGE SD. WITH LITTLE OR NO LOW LEVEL
JET SUPPORT AND VERY LITTLE SHEAR THE TSTM COMPLEX MOVING INTO
CENTRAL ND IS NOT GETTING MUCH TO SUSTAIN IT. WILL CONTINUE TO
MONITOR THOUGH AND SEE WHAT HAPPENS. NOT LOOKING LIKE MUCH PCPN
WILL REACH THE WESTERN FA UNTIL AFTER MIDNIGHT SO WILL CONTINUE TO
DELAY THE ONSET OF THE HIGHER PCPN CHANCES UNTIL AFTER THEN.

&&

.SHORT TERM...(THIS EVENING THROUGH TUESDAY NIGHT)
ISSUED AT 325 PM CDT MON JUL 8 2013

FORECAST CHALLENGE CONCERNS PCPN CHANCES NEXT 24 HOURS AND
TEMPERATURES. MODELS OVERALL IN FAIRLY GOOD AGREEMENT NEXT 24
HOURS WITH SHORTWAVE/COLD FRONTAL PASSAGE.

REGION TO REMAIN IN ZONAL FLOW WITH TWO SHORTWAVES TO IMPACT
CENTRAL AND NORTHERN PLAINS TONIGHT. FIRST WAVE ACROSS W NE/WYO TO
AID IN CONVECTIVE DEVELOPMENT JUST TO OUR SOUTH. OF MORE CONCERN
IS STRONGER WAVE WORKING INTO WESTERN MT. EXPECT CONVECTION
ASSOCIATED WITH THIS FEATURE TO INCREASE IN ITS CURRENT COVERAGE
AND PROPAGATE EAST OVERNIGHT. FAVORED LOCATION IS ACROSS NORTHERN
ND WHERE MOST MODELS MAINTAIN SURFACE BOUNDARY. COULD SEE SOME
SPOTTY CONVECTION ALONG ABOVE BOUNDARY THIS EVENING BUT MAIN
COMPLEX LOOKS TO ENTERING NW FA MIDNIGHT OR AFTER. PRIMARY CONCERN
AT THIS POINT WILL PROBABLY BE STRONG WIND. HAVE MAINTAIN HIGHER
POPS THIS AREA. AFTER COORDINATION WITH SPC HAVE LIMITED SEVERE
WORDING TO DVL BASIN AFT 06Z. WITH COLD FRONT HOLDING UP MAINLY N
OF FA TEMPERATURES SHOULD REMAIN MILD OVERNIGHT.

COLD FRONT DROPS THROUGH FA DURING THE DAY TUESDAY WILL LIKELY SEE
SOME LINGERING CONVECTION ACROSS NORTHERN FA WITH SOME ADDITIONAL
STORMS POSSIBLE ALONG COLD FRONT. COLD FRONT LOOKS TO BE ORIENTED
ACROSS SE FA NEAR PRIME HEATING SO SEVERE POTENTIAL TOMORROW MAY
BE LIMITED AS BOUNDARY WELL SE OF FA BY 00Z. STEADY COLD ADVECTION
WILL HOLD TEMPERATURES AT OR BLO AVERAGE ACROSS NW FA WITH WARMEST
TEMPERATURES ACROSS SE FA LAST TO SEE CFP.

CONVECTION LIKELY TO BE OUT OF FA BY 00Z. COOLER MINIMUMS EXPECTED
WITH LOWS GENERALLY IN THE 50S.

.LONG TERM...(WEDNESDAY THROUGH MONDAY)
ISSUED AT 325 PM CDT MON JUL 8 2013

HIGH PRESSURE BUILDS IN WEDNESDAY FOR TEMPERATURES LIKELY A LITTLE
BLO AVERAGE. SURFACE RIDGE AXIS WILL BE OVER FA THURSDAY NIGHT FOR
MORE COOL TEMPERATURES.

SURFACE HIGH SHIFTS EAST THURSDAY. WARM ADVECTION AND RETURN FLOW
SHOULD GET TEMPERATURES BACK TO AT OR ABOVE AVERAGE.

AN UPPER LEVEL RIDGE SHOULD CREST OVER THE REGION EARLY IN THE
PERIOD...WITH MORE ZONAL FLOW THEREAFTER. TEMPS SHOULD BEGIN THE
PERIOD ABOVE NORMAL AND COOL TO NEAR NORMAL FOR SUN/MON. THERE WILL
BE PERIODIC CHANCES FOR SHOWERS AND STORMS...WITH THE BEST CHANCES
FRI AFTERNOON AND FRI NIGHT. FOR NOW WILL KEEP SUN/MONDAY DRY WITH
SOME DRIER AIR AND HIGH PRESSURE PROGGED BY MOST MODELS...ALTHOUGH
TOUGH TO TIME SYSTEMS DURING THIS TIME OF YEAR SO WILL CONTINUE TO
MONITOR TRENDS.

&&

.AVIATION...(FOR THE 06Z TAFS THROUGH 06Z TUESDAY NIGHT)
ISSUED AT 1137 PM CDT MON JUL 8 2013

TRIED TO PUT A BEST GUESS FOR TIMING TSTMS INTO THE TAFS.
LOOKING LIKE THE KDVL TAF MAY SEE THE THUNDER FIRST OR JUST AFTER
MIDNIGHT. AS FOR THE OTHER TAFS IT WILL BE LATER IF AT ALL. THERE
COULD ALSO BE SOME REDEVELOPMENT ALONG THE COLD FRONTAL BOUNDARY
AS IT DROPS SOUTHEAST ON TUE. SO IF THIS COMPLEX DIES OUT LATE
TONIGHT BEFORE IT REACHES THE RED RIVER VALLEY THERE MAY BE SOME
REDEVELOPMENT BY THE NOON HOUR WHICH COULD STILL POSSIBLY AFFECT
THE KFAR TAF.

&&

.FGF WATCHES/WARNINGS/ADVISORIES...
ND...NONE.
MN...NONE.
&&

UPDATE...GODON
SHORT TERM...VOELKER
LONG TERM...DK/VOELKER
AVIATION...GODON

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND FORKS ND
552 AM CDT MON JUL 8 2013

MNZ005-006-008-009-013>017-022>024-027-028-030>032-040-091100-
ROSEAU-LAKE OF THE WOODS-EAST MARSHALL-NORTH BELTRAMI-PENNINGTON-
RED LAKE-EAST POLK-NORTH CLEARWATER-SOUTH BELTRAMI-MAHNOMEN-
SOUTH CLEARWATER-HUBBARD-WEST BECKER-EAST BECKER-WEST OTTER TAIL-
EAST OTTER TAIL-WADENA-GRANT-
552 AM CDT MON JUL 8 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN NORTH
DAKOTA...WEST CENTRAL AND NORTHWEST MINNESOTA.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A COMPLEX OF THUNDERSTORMS IS EXPECTED TO MOVE INTO WESTERN
MINNESOTA DURING THE EARLY MORNING HOURS TUESDAY. THE COMPLEX WILL
BE WEAKENING AS IT MOVES EASTWARD...BUT SOME DAMAGING WIND GUSTS
WILL BE POSSIBLE. AFTER A BREAK IN THE THUNDERSTORM ACTIVITY MID
DAY...THUNDERSTORMS COULD REDEVELOP ACROSS WEST CENTRAL MINNESOTA
DURING THE LATE AFTERNOON AS A COLD FRONT MOVES INTO THE REGION.
LARGE HAIL AND DAMAGING WINDS WILL BE THE PRIMARY THREAT TUESDAY
AFTERNOON AND EVENING.

MORE THUNDERSTORM ACTIVITY IS EXPECTED FRIDAY AND ON AND OFF AGAIN
THROUGH NEXT WEEKEND. EXACT THUNDERSTORM STRENGTH IS UNCERTAIN AT
THIS POINT...SO STAY TUNED FOR FURTHER UPDATES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED EARLY TUESDAY MORNING.

MNZ001>004-007-029-NDZ006>008-014>016-024-026>030-038-039-049-
052>054-091100-
WEST POLK-NORMAN-CLAY-KITTSON-WEST MARSHALL-WILKIN-TOWNER-
CAVALIER-PEMBINA-BENSON-RAMSEY-EASTERN WALSH-EDDY-NELSON-
GRAND FORKS-GRIGGS-STEELE-TRAILL-BARNES-CASS-RANSOM-SARGENT-
RICHLAND-WESTERN WALSH-
552 AM CDT MON JUL 8 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN NORTH
DAKOTA...WEST CENTRAL AND NORTHWEST MINNESOTA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS WILL BEGIN TO MOVE INTO THE DEVILS LAKE BASIN LATE
THIS AFTERNOON...SPREADING EASTWARD TOWARDS THE RED RIVER VALLEY
LATER TONIGHT. THERE IS A CHANCE FOR SOME LARGE HAIL IN THE DEVILS
LAKE BASIN EARLY ON...BUT THE PRIMARY THREAT IS EXPECTED TO BE
DAMAGING WINDS AS A COMPLEX OF THUNDERSTORMS ORGANIZES AND MOVES
EASTWARD. EXACT PATH OF THE THUNDERSTORM COMPLEX IS STILL
UNCERTAIN...BUT IT COULD PRODUCE WINDS IN EXCESS OF 60 MPH AS IT
MOVES THROUGH.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

RAIN AND THUNDERSTORMS COULD LINGER DURING THE EARLY MORNING HOURS
TUESDAY. AFTER A BREAK IN THE THUNDERSTORM ACTIVITY MID
DAY...THUNDERSTORMS COULD REDEVELOP ACROSS SOUTHEASTERN NORTH
DAKOTA AND WEST CENTRAL MINNESOTA DURING THE LATE AFTERNOON AS A
COLD FRONT MOVES INTO THE REGION. LARGE HAIL AND DAMAGING WINDS
WILL BE THE PRIMARY THREAT TUESDAY AFTERNOON AND EVENING.

MORE THUNDERSTORM ACTIVITY IS EXPECTED FRIDAY AND ON AND OFF AGAIN
THROUGH NEXT WEEKEND. EXACT THUNDERSTORM STRENGTH IS UNCERTAIN AT
THIS POINT...SO STAY TUNED FOR FURTHER UPDATES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TONIGHT.

JR

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
102 AM CDT TUE JUL 9 2013

NDZ014-015-024-090700-
BENSON ND-EDDY ND-RAMSEY ND-
102 AM CDT TUE JUL 9 2013

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN RAMSEY...EDDY AND
SOUTHEASTERN BENSON COUNTIES UNTIL 200 AM CDT...

AT 101 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
THUNDERSTORMS 6 MILES NORTHEAST OF NEW ROCKFORD...OR 27 MILES SOUTH
OF DEVILS LAKE...MOVING TO THE NORTHEAST AT 25 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THE STORM.

THE STORMS WILL BE NEAR...
FORT TOTTEN AROUND 120 AM CDT.
TOKIO...ST MICHAEL AND CAMP GRAFTON AROUND 135 AM CDT.
DEVILS LAKE AND WARWICK AROUND 145 AM CDT.
HAMAR AROUND 155 AM CDT.

BE PREPARED TO TAKE SHELTER IF THE STORMS INTENSIFY AND BECOME
SEVERE...OR A WARNING IS ISSUED BY THE NATIONAL WEATHER SERVICE.

LAT...LON 4825 9855 4761 9855 4760 9918 4805 9940
TIME...MOT...LOC 0602Z 244DEG 21KT 4773 9901

JR

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