Area Forecast Discussion
Issued by NWS Grand Forks, ND

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FXUS63 KFGF 252000
AFDFGF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND FORKS ND
300 PM CDT FRI JUL 25 2014

.SHORT TERM...(THIS EVENING THROUGH SATURDAY NIGHT)
ISSUED AT 250 PM CDT FRI JUL 25 2014

FORECAST CHALLENGE CONCERNS LOW END PCPN CHANCES AND TEMPERATURES.
MODELS IN FAIR AGREEMENT AND WILL USE BLEND FOR FORECAST.

BOUNDARY JUST EAST OF THE VALLEY. SPOTTY CONVECTION TRYING TO
ORGANIZE JUST NORTH OF THE BORDER ALONG BOUNDARY AHEAD OF WEAK MID
LEVEL IMPULSE. COULD SEE SOME SOUTHWARD DEVELOPMENT REMAINDER OF
THE AFTERNOON SO LOW POPS SEEM JUSTIFIED. BY EVENING FRONT SHOULD
BE EAST OF FA OR CLOSE TO SO KEPT THE OVERNIGHT DRY. THERMAL RIDGE
SHIFTS OVER FA HOWEVER WITH FAIRLY LOW DEWPOINTS AND LIGHT MIXING
TEMPERATURES SHOULD BE ABLE TO DIP A TAD BLO AVERAGE.

ON SATURDAY UPPER LOW WILL TRACK ALONG INTERNATIONAL BORDER. AS IT
DOES A RESPECTABLE COLD FRONT WILL DROP FROM NW-SE ACROSS THE FA.
COLD POOL ENTERS THE NORTHERN FA DURING THE AFTERNOON AND WILL
KEEP BEST CHANCE FOR PCPN THIS AREA. AIRMASS FAIRLY STABLE SO
CONFIDENCE LOW ON ANY T AND TRIMMED BACK TO MOSTLY SHRA. SOUTHERN
FA SHOULD STILL BE ABLE TO RECOVER TO AVERAGE MID SUMMER VALUES
WITH COOLEST TEMPERATURES ACROSS THE FAR NORTH. FAIRLY DEEP MIXED
LAYER SO EXPECT BREEZY TO WINDY CONDITIONS WITH STRONGEST WINDS
OVER DVL BASIN.

UPPER LOW DROPS SE ACROSS NE MN OVERNIGHT. WILL MAINTAIN SOME LOW
POPS ACROSS ROUGHLY NE HALF OF FA AS TRAILING SURFACE BOUNDARY
FOLLOWS UPPER LOW.

.LONG TERM...(SUNDAY THROUGH FRIDAY)
ISSUED AT 250 PM CDT FRI JUL 25 2014

SUNDAY WILL BE MUCH COOLER WITH SCT SHRA.

UPPER LOW EXITS THE REGION SUNDAY NIGHT WITH SURFACE HIGH
PRESSURE BUILDING IN WITH MID LEVEL NORTHWEST FLOW. COOLER COLUMN
WILL RESULT IN DRY BUT BLO AVERAGE TEMPERATURES.

HIGH AND DRY BEST DESCRIBES THE MID AND LATE WEEK PERIODS. GFS AND
ECMWF ARE BOTH LOCKED ONTO A FAIRLY HIGH AMPLITUDE WESTERN NOAM H5
RIDGE POSITION THROUGH MUCH OF THE COMING WEEK WITH NO CLEAR SIGNS
OF ANY SIGNIFICANT SHORTWAVE ACTIVITY MAKING ITS WAY ACROSS THE NRN
PLAINS.  THE ECMWF HAS A THREAT OF A ISOLATED SHOWER LATE WEDNESDAY
OR EARLY THURSDAY... BUT WITH THE GFS COMING IN MARKEDLY DRY DURING
THAT SAME PERIOD...BOTH NCEP AND CONSENSUS POPS WOULD KEEP US DRY.
UNDER SUCH A SCENARIO...MAX AND MIN TEMPS ARE TRENDED VERY NEAR LONG
TERM SEASONAL NORMALS.

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SATURDAY AFTERNOON)
ISSUED AT 1228 PM CDT FRI JUL 25 2014

RESIDUAL SCT MVFR CIGS FROM EARLY AM SYSTEM WILL SLOWLY SHIFT WED
ACROSS NR MN...LIFTING AND ERODING AS SHORTWAVE RIDGING DEVELOPS
ORV THE RRV. EXPECT MAINLY VFR CIGS THROUGH THE AFTERNOON WITH MOST
LOCATIONS SEEING CLEAR SKIES AND LIGHT WEST TO NORTHWEST BY EVENING.
MIDDAY ON SATURDAY WILL SEE THE APPROACH OF A STORM SYSTEM CURRENTLY
MOVING INTO SE RN SASK... WITH SCT TSTMS DEVELOPING ALONG AND NORTH OF
HWY 200.


&&

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

$$

SHORT TERM...VOELKER
LONG TERM...GUST/VOELKER
AVIATION...GUST





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