Area Forecast Discussion
Issued by NWS Bismarck, ND

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000
FXUS63 KBIS 260013
AFDBIS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
613 PM CST TUE NOV 25 2014

.UPDATE...
ISSUED AT 613 PM CST TUE NOV 25 2014

UPDATE TO TRIM DOWN THE AREAL EXTENT OF THE WINTER WEATHER AND
WIND ADVISORIES.

THE BAND OF MODERATE TO HEAVY SNOW IS NOW BOUNDED GENERALLY BY US
HIGHWAY 2 ACROSS THE NORTH AND HIGHWAY 83 ACROSS THE WEST AS OF 00
UTC THIS EVENING. FOLLOWING THE LATEST ITERATIONS OF THE
HRRR...NAMELY ITS 21-22 UTC RUNS...ALL INGREDIENTS SUPPORTIVE OF
MESOSCALE BANDING WITH STEEP MID LEVELS LAPSE RATES...STRONG OMEGA
IN THE DENDRITIC GROWTH ZONE EMBEDDED WITHIN LARGER SCALE FORCING
WILL MAINTAIN ITSELF...FOCUSING INTO THE JAMES RIVER VALLEY AND
SOUTHEAST NORTH DAKOTA THROUGH THE EVENING.

&&

.SHORT TERM...(THIS EVENING THROUGH WEDNESDAY)
ISSUED AT 333 PM CST TUE NOV 25 2014

MADE SOME ADJUSTMENTS TO THE HEADLINES AS THE SNOW HAS NEARLY
ENDED WEST. WITH TEMPERATURES TODAY IN THE MID TO UPPER 30S WEST
CENTRAL AND SOUTHWEST...DO NOT ANTICIPATE BLOWING SNOW WITH WINDS
TONIGHT. SO REPLACED THE WINTER WEATHER ADVISORY WITH A WIND
ADVISORY THERE UNTIL 9 PM THIS EVENING. ALSO SHORTENED THE WINTER
WEATHER ADVISORY CENTRAL WHICH IS NOW IN EFFECT UNTIL 9 PM. THE
REST OF THE ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT NORTHEAST
AND 6 AM CST JAMES RIVER VALLEY. SNOW SPREADING EAST AND ENDING
OVERNIGHT. STILL EXPECT 3 TO 4 INCHES NORTH CENTRAL TO THE JAMES
RIVER VALLEY WITH 2 INCHES TOTAL SOUTH CENTRAL.

CHANCE OF SNOW WEDNESDAY SOUTHWEST WITH THE NEXT SYSTEM THAT WILL
BRUSH THE REGION WEDNESDAY.

.LONG TERM...(WEDNESDAY NIGHT THROUGH TUESDAY)
ISSUED AT 333 PM CST TUE NOV 25 2014

THE MAIN CHALLENGE FOR THE EXTENDED WILL BE THE WINTER WEATHER
POTENTIAL FOR THANKSGIVING DAY.

A WARM FRONT WILL BE LIFTING NORTH ACROSS SOUTHWESTERN INTO
CENTRAL NORTH DAKOTA THURSDAY AFTERNOON/EVENING. MID-LEVEL
FRONTOGENSIS AHEAD OF THE WARM FRONT WILL LEAD TO SNOW
DEVELOPMENT...MAINLY OVER NORTHERN AND CENTRAL NORTH DAKOTA.
HOWEVER...LINGERING MOISTURE ON THE WARM SECTOR OF THE FRONT COULD
PRODUCE A WINTRY MIX OF SNOW...SLEET...AND FREEZING RAIN MAINLY
SOUTHWEST OF THE MISSOURI RIVER THURSDAY AFTERNOON. THE LATEST
MODELS HAVE LOWERED THE EXPECTED PRECIPITATION AMOUNTS. ADJUSTED
THE SNOW TOTALS DOWN BY AN INCH OR TWO IN SPOTS AS A RESULT. GIVEN
THE WAFFLING MODEL TO MODEL AND RUN TO RUN SNOW AMOUNTS...WILL
CONTINUE TO HIGHLIGHT THIS THREAT IN THE HWO FOR NOW.

WARM AND DRY AIR WILL THEN ADVECT INTO THE REGION FRIDAY AHEAD OF
A SURFACE CYCLONE WITH MAINLY DRY CONDITIONS EXPECTED.

THE SURFACE LOW IS THEN PROGGED TO DIVE SOUTH ACROSS NORTH DAKOTA
FRIDAY NIGHT...WITH SNOW CHANCES INCREASING FROM NORTH TO SOUTH
SATURDAY.

HIGH PRESSURE...DRY CONDITIONS...AND MUCH COLDER AIR IS THEN
PROGGED TO FILTER INTO THE REGION SATURDAY NIGHT INTO SUNDAY. WIND
CHILLS ARE FORECAST TO APPROACH ADVISORY CRITERIA BOTH SUNDAY AND
MONDAY MORNINGS.

THE COLD CONDITIONS APPEAR TO BE SHORT LIVED AS A WARM FRONT IS
FORECAST TO LIFT ACROSS THE REGION TUESDAY IN RESPONSE TO BROAD
TROUGHING OVER THE WESTERN CONUS.

&&

.AVIATION...(FOR THE 00Z TAFS THROUGH 00Z WEDNESDAY EVENING)
ISSUED AT 612 PM CST TUE NOV 25 2014

LIFR CONDITIONS IN SNOW WILL CONTINUE AT KJMS THROUGH 05-06
UTC...SLOWLY IMPROVING TO MVFR IN SNOW AND BLOWING SNOW BY 08-09
UTC. IFR CONDITIONS IN SNOW AT KBIS AND KMOT WILL IMPROVE BETWEEN
01-03 UTC WITH MVFR STRATUS IMPACTING KISN AND KDIK THROUGH THE
NIGHT INTO WEDNESDAY.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
WINTER WEATHER ADVISORY UNTIL 9 PM CST THIS EVENING FOR NDZ011-
021-035-046.

WINTER WEATHER ADVISORY UNTIL MIDNIGHT CST TONIGHT FOR NDZ012-
013-022.

WINTER WEATHER ADVISORY UNTIL 6 AM CST WEDNESDAY FOR NDZ023-025-
036-037-047-048-050-051.

WIND ADVISORY UNTIL 8 PM MST THIS EVENING FOR NDZ031>033-040-041-
043-044.

&&

$$

UPDATE...AYD
SHORT TERM...WAA
LONG TERM...TM
AVIATION...AYD






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