Area Forecast Discussion
Issued by NWS Bismarck, ND

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

000
FXUS63 KBIS 092308
AFDBIS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
608 PM CDT WED JUL 9 2014

.UPDATE...
ISSUED AT 608 PM CDT WED JUL 9 2014

VISIBLE SATELLITE IMAGERY CONTINUES TO NICELY DEPICT THE AREAS OF
SMOKE LINGERING ACROSS THE NORTHERN PLAINS EXTENDING FROM
SOUTHEASTERN SASKATCHEWAN THROUGH NORTHWESTERN AND CENTRAL NORTH
DAKOTA...AND INTO EASTERN SOUTH DAKOTA.

MODELS PROG AN INCREASING LOW-LEVEL JET DEVELOPING WEST TONIGHT IN
ADVANCE OF AN APPROACHING COLD FRONT. THE INCREASING BOUNDARY
LAYER FLOW SHOULD SERVE TO BEGIIN TO MIX OUT THE SMOKE ACROSS THE
DAKOTAS. UNTIL THE MIXING MATERIALIZES...WILL MAINTAIN THE AREAS
OF SMOKE WORDING ACROSS NORTHWESTERN AND CENTRAL NORTH DAKOTA
TONIGHT. OTHERWISE...THE REMAINING FORECAST IS IN GOOD SHAPE. THE
FRESHENED UP TEXT PRODUCTS HAVE BEEN SENT.

&&

.SHORT TERM...(THIS EVENING THROUGH THURSDAY)
ISSUED AT 254 PM CDT WED JUL 9 2014

SMOKE WILL CONTINUE TO BE NOTICEABLE IN A RATHER BENIGN NORTHWEST
FLOW FIELD TONIGHT. AGAIN AS TEMPERATURES INVERSION DEEPENS
OVERNIGHT MORE TRAPPED SMOKE WILL BE SEEN. ON THURSDAY AN
APPROACHING COLD FRONT WILL BE THE FOCUS FOR SCATTERED SHOWERS AND
THUNDERSTORMS. THE SOUTH WILL BE MAINLY CAPPED MOST OF THE DAY.
THE BETTER OPPORTUNITY TO GET THUNDERSTORMS WILL BE ACROSS THE
NORTH AND HAVE BUMPED THE PROBABILITY TO LIKELY ACROSS THE NORTH
WEST AND NORTH CENTRAL. CURRENT MODEL TRENDS SHOW HEAVIER
RAINFALL LIKELY TO BE NORTH IN CANADA. AN ISOLATED INCH IN
THUNDERSTORMS ARE POSSIBLE THROUGH ACROSS THE NORTH CENTRAL WITH
MORE BASIN AVERAGE AMOUNTS LIKELY TO BE A QUARTER INCH OR LESS. SO
A FLOODING CONCERN IS NOT ANTICIPATED.

.LONG TERM...(THURSDAY NIGHT THROUGH WEDNESDAY)
ISSUED AT 254 PM CDT WED JUL 9 2014

A COLD FRONT WILL BE MOVE INTO CENTRAL NORTH DAKOTA BY 06Z FRIDAY
AND INTO THE JAMES RIVER VALLEY BY 12Z FRIDAY. SCATTERED SHOWERS AND
THUNDERSTORMS ARE EXPECTED ALONG AND AHEAD OF THIS FRONT THURSDAY
NIGHT AND GRADUALLY TAPERING OFF FRIDAY MORNING ACROSS THE
SOUTHEAST. HOW MUCH OF THE CAP WILL BE ERODED THURSDAY EVENING FROM
MINOT TO BISMARCK AND EAST TO JAMESTOWN WILL DICTATE IF STRONG TO
SEVERE THUNDERSTORMS CAN MATERIALIZE THURSDAY NIGHT. COOLER AND
DRIER WEATHER WILL FOLLOW THE COLD FRONT FRIDAY. SURFACE HIGH
PRESSURE WILL MOVE FROM NORTHWEST NORTH DAKOTA INTO THE JAMES RIVER
VALLEY FRIDAY THROUGH SATURDAY MORNING. HOWEVER THE NEXT SHORTWAVE
AND SURFACE LOW WILL EVOLVE IN A WESTERLY FLOW ALOFT AND DEVELOP
OVER SOUTHEAST MONTANA FRIDAY NIGHT. A RETURN LOW LEVEL SOUTHEAST
FLOW WILL SET UP ALLOWING FOR AN INCREASE IN MOISTURE INTO SOUTHWEST
AND SOUTH CENTRAL NORTH DAKOTA. THIS WILL LEAD TO A CHANCE OF
SHOWERS AND THUNDERSTORMS FRIDAY NIGHT THROUGH SATURDAY
NIGHT...MAINLY ACROSS THE SOUTH. A STRONGER NORTHWEST FLOW WITH AN
ASSOCIATED SURFACE COLD FRONT WILL EMERGE OVER SOUTHERN CANADA
SUNDAY AND SHIFT SOUTH DURING THE DAY. THIS WILL PUSH ANY LINGERING
PRECIPITATION THREAT OUT OF WESTERN AND CENTRAL NORTH DAKOTA BY LATE
MORNING. A STRONG NORTHWEST FLOW THEN TAKES CONTROL FOR THE
REMAINDER OF THE LONG TERM PERIOD. THIS WILL RESULT IN HIGHS IN THE
70S MONDAY THROUGH WEDNESDAY. OVERNIGHT LOWS WILL GENERALLY BE IN
THE LOW TO MID 50S. DRY WEATHER IS FORECAST DURING THIS PERIOD PER
GFS...ALTHOUGH THE ECMWF SHOWS A COUPLE OF DISTURBANCES BRUSHING THE
TURTLE MOUNTAINS INTO THE NORTHERN JAMES RIVER VALLEY MONDAY AND
TUESDAY. THE CURRENT ALLBLEND GIVES A DRY SCENARIO AND WILL LET IT
STAND FOR NOW. HOWEVER...EXPERIENCE WITH A NORTHWEST/CYCLONIC FLOW
FROM PAST YEARS IS NEVER COMPLETELY DRY...AND MAY NEED TO LEAN TOWARDS
THE ECMWF IF CURRENT TRENDS CONTINUE.

&&

.AVIATION...(FOR THE 00Z TAFS THROUGH 00Z THURSDAY EVENING)
ISSUED AT 608 PM CDT WED JUL 9 2014

AREAS OF SMOKE FROM CANADIAN FOREST FIRES WILL CONTINUE TO IMPACT
THE WESTERN AND CENTRAL NORTH DAKOTA TERMINAL AERODROMES TONIGHT.
PRIMARILY MVFR VSBYS ARE EXPECTED TO DEVELOP FROM KISN-KMOT-KBIS-
KJMS TONIGHT AS THE BOUNDARY LAYER STABILIZES. IFR VSBYS ARE NOT
OUT OF THE QUESTION. THE SMOKE SHOULD BEGIN TO MIX OUT AFTER 12Z
AS SOUTHERLY BOUNDARY LAYER WINDS DEVELOP AND INCREASE THROUGH THE
DAY AHEAD OF A COLD FRONT. THE FRONT WILL THEN ENTER NORTHWESTERN
NORTH DAKOTA NEAR THE END OF THE TAF PERIOD BRINGING A CHANCE OF
THUNDERSTORMS WITH IT. INDICATED SAID POSSIBILITY LATE IN THE KISN
TAF AS A RESULT.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

$$

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



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.