Area Forecast Discussion
Issued by NWS Rapid City, SD

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 KUNR 020823
AFDUNR

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
223 AM MDT TUE SEP 2 2014

.SHORT TERM...TODAY THROUGH WEDNESDAY NIGHT
ISSUED AT 220 AM MDT TUE SEP 2 2014

CURRENT SURFACE MAP PLACES HIGH PRESSURE ACROSS SOUTH
DAKOTA/NEBRASKA WITH CLEAR SKIES AND LIGHT WINDS. FLAT UPPER LEVEL
RIDGE BUILDS ACROSS THE NORTHERN PLAINS TODAY AS STRONG SHORTWAVE DIGS
INTO THE PACIFIC NORTHWEST. SUNNY SKIES WITH TEMPERATURES NEAR
AVERAGE. SHORTWAVE TRACKS ACROSS NORTHERN MONTANA ON
WEDNESDAY. WITH SURFACE LOW DEEPENING ACROSS WESTERN NORTH DAKOTA.
SURGE OF LOW LEVEL WARM AIR ACROSS WESTERN SOUTH DAKOTA WILL
RESULT IN HIGHS AROUND 90 EAST OF THE BLACK HILLS. AS SURFACE LOW
MOVES EAST WEDNESDAY NIGHT...STRONG COLD FRONT TRACKS ACROSS THE
FORECAST AREA. 6-7MB/3HR PRESSURE RISES AND 40KT BOUNDARY LAYER
WINDS WILL RESULT IN A PERIOD OF GUSTY WINDS BEHIND THE FRONT.

&&

.LONG TERM...THURSDAY THROUGH MONDAY
ISSUED AT 220 AM MDT TUE SEP 2 2014

AN UPPER TROUGH WILL CROSS ND/SRN CANADA THURSDAY WITH
THE BEST FORCING REMAINING N/NE OF THE AREA. THIS WILL KEEP DRY
WEATHER ACROSS THE AREA...AND WITH COLDER AIR FILTERING IN...TEMPS
WILL BE WELL BELOW AVERAGE. HIGH PRESSURE WILL DOMINATE THE UPPER
MIDWEST INTO THE GREAT PLAINS FOR THE END OF THE WEEK...WITH RETURN
FLOW SETTING UP ACROSS THE REGION. WARMER AIR WILL BRING TEMPS BACK
TO NEAR AVERAGE BY SUNDAY. MODELS COMING INTO BETTER AGREEMENT WITH
THE UPPER PATTERN FOR THE WEEKEND INTO EARLY NEXT WEEK. SPLIT FLOW
DEVELOPS OVER THE WRN CONUS WHICH SLOWS DOWN THE OVERALL EWD
PROGRESSION. THE RESULT IS DRIER WEATHER TO THE AREA WHICH MODELS
ARE NOW TRENDING TOWARD. HAVE DROPPED THE SL CHC POPS EXCEPT OVER
THE BLKHLS. WILL KEEP IN SOME POPS FOR THE END OF THE LONG TERM AS
THE PATTERN COULD BECOME MORE ACTIVE AGAIN WITH THE NEXT TROUGH
CROSSING THE PACIFIC NORTHWEST.

&&

.AVIATION...(FOR THE 12Z TAFS THROUGH 12Z WEDNESDAY MORNING)
ISSUED AT 220 AM MDT TUE SEP 2 2014

VFR CONDITIONS ARE EXPECTED THROUGH THE FORECAST PERIOD.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...NONE.
WY...NONE.
&&

$$

SHORT TERM...7
LONG TERM...13
AVIATION...13





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