Area Forecast Discussion
Issued by NWS Glasgow, MT

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
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
FXUS65 KGGW 201427
AFDGGW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
827 AM MDT SAT SEP 20 2014

.SHORT TERM...FOR NORTHEAST MONTANA...TODAY THROUGH MONDAY...

MORNING UPDATE...
GOING FORECAST LOOKS GOOD AND NO CHANGES ARE ANTICIPATED. RADAR
AND SATELLITE ARE DISPLAYING SOME SHOWERS WHICH HAVE JUST EXITED
OUT OF THE FAR NORTHEAST. THESE FORMED ON A COLD FRONTAL BOUNDARY
THAT IS MOVING ACROSS AREA FROM NORTHWEST TO SOUTHEAST. HIGH
PRESSURE TO THE WEST WILL SLOWLY BUILD INTO THE AREA DECREASING
WINDS BEHIND THE FRONT DURING THE LATE AFTERNOON HOURS. GAH


PREVIOUS SHORT TERM DISCUSSION...
THE DAY BEGINS WITH A LONG-WAVE RIDGE OVER THE WEST WITH THE AXIS
FOLLOWING THE WEST COAST. THIS WILL PLACE NORTHEAST MONTANA UNDER
A NORTHWEST FLOW ALOFT. AN EMBEDDED SHORTWAVE DISTURBANCE WILL BE
SLIDING SOUTHEAST THROUGH THE NORTHERN COUNTIES NEAR THE BORDER OF
NORTH DAKOTA AND CANADA. THIS WAVE WILL QUICKLY MOVE OUT OF THE
AREA. THERE MIGHT BE A FEW SHOWERS IN THE AREA EARLY IN THE
MORNING. THE DISTURBANCE WILL ALSO MAINTAIN TEMPERATURES A BIT
BELOW NORMAL TODAY.

THE MAIN CHALLENGE FOR TODAY WILL BE WINDS. THE GLANCING BLOW FROM
THE SOUTH-WAVE DISTURBANCE WILL BEGIN TO PICK UP WIND MOST
STRONGLY IN THE EASTERN ZONES. A SURFACE HIGH MOVING IN FROM THE
WEST WILL DIMINISH WIND FROM THE WEST IN THE MORNING. SO WIND
SPEED OVER FORT PECK LAKE WILL BE LESS THAN WIND SPEED EAST OF
THERE. HOWEVER WIND SPEED IS CLOSE ENOUGH TO ADVISORY CRITERIA TO
GO AHEAD AND ISSUE IT.

THE RIDGE AXIS WILL WORK ITS WAY EAST THROUGH THE SHORT TERM WITH
THE RIDGE AXIS CROSSING THE DIVIDE ON SUNDAY...AND PASSING THROUGH
THE CWA ON MONDAY. A CLOSED LOW...CURRENTLY SPINNING OVER
CALIFORNIA...WILL SLOWLY MOVE NORTHEAST...OPENING UP AND REACHING
WYOMING ON MONDAY. THE TROUGH ENERGY REMAINS WELL TO THE SOUTH. SO
THE FORECAST FOR SUNDAY AND MONDAY WILL SEE WARMING AND DRY
CONDITIONS. SCT


.LONG TERM...MONDAY NIGHT THROUGH SATURDAY...
MONDAY NIGHT AND TUESDAY HAS A LARGE RIDGE COVERING MOST OF THE US
AND SOUTHERN CANADA WITH THE RIDGE AXIS IN MINNESOTA. WITH IN THIS
RIDGE... THERE WILL BE A SLOW MOVING SHORTWAVE TROUGH MOVING FROM
WYOMING TO SOUTH DAKOTA. AT THIS POINT... THE MOISTURE FROM THIS
SYSTEM STAY TO THE SOUTH OF THE FORECAST AREA. WILL HAVE A DRY
FORECAST IN PLACE.

THIS SHORTWAVE TROUGH MOVES TO THE EAST ON WEDNESDAY AND UPPER
RIDGE STRENGTHENS OVER MONTANA WITH WARM AND DRY WEATHER. THIS
RIDGE REMAINS IN THE AREA ON THURSDAY.

UPPER TROUGH DIGGING OVER THE WEST COAST LATE IN THE WEEK WILL BE
SLOW TO MOVE TO THE EAST WITH LARGE UPPER RIDGE TO THE EAST OVER
THE NORTHERN PLAINS AND GREAT LAKES. WILL GRADUALLY BRING A SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS INTO THE AREA BY NEXT WEEKEND.
FORRESTER


&&

.AVIATION...
VFR WITH A FEW MID LEVEL CLOUDS THIS MORNING.


&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...
LAKE WIND ADVISORY UNTIL 7 PM MDT THIS EVENING FOR FORT PECK
LAKE FOR CENTRAL AND SOUTHEAST PHILLIPS...CENTRAL AND SOUTHERN
VALLEY...GARFIELD...MCCONE...PETROLEUM.


&&

$$

WEATHER.GOV/GLASGOW




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