Area Forecast Discussion
Issued by NWS Great Falls, MT

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FXUS65 KTFX 011114
AFDTFX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
515 AM MDT SUN MAY 1 2016

AVIATION SECTION UPDATED

.DISCUSSION...
TODAY THROUGH TUESDAY...WITH AN UPPER LEVEL RIDGE OF HIGH PRESSURE
BUILDING OVER THE REGION...DRY AND MILD CONDITIONS WILL PREVAIL
OVER THE REGION THROUGH TUESDAY. OTHER THAN SOME PASSING MID/HIGH
LEVEL CLOUDS FROM TIME TO TIME...MOSTLY CLEAR SKIES WILL
PREVAIL...WITH NO PRECIPITATION EXPECTED THROUGH TUESDAY.
AFTERNOON TEMPERATURES WILL WARM EACH DAY...FROM NEAR SEASONAL
NORMALS TODAY...TO NEAR 15 DEGREES ABOVE NORMAL BY TUESDAY
AFTERNOON. BRUSDA

TUESDAY NIGHT THROUGH SUNDAY...CENTRAL AND SOUTHWEST MONTANA WILL BE
UNDERNEATH A HIGH PRESSURE RIDGE TUESDAY NIGHT. TO THE WEST, A LOW
PRESSURE TROF OVER THE EASTERN PACIFIC WILL BE APPROACHING THE WEST
COAST. AS THE RIDGE MOVES EAST AND THE TROF MOVES OVER THE WEST
COAST, HEIGHTS ALOFT WILL BEGIN TO FALL AND THE AIRMASS WILL BECOME
SLIGHTLY UNSTABLE. THE AIRMASS WILL REMAIN DRY BUT ISOLATED SHOWERS
OVER THE ROCKIES AND SOUTHWEST MONTANA WILL BE POSSIBLE. THE LOW
PRESSURE CENTER OF THE TROF WILL DROP WELL SOUTH OVER SOUTHERN
CALIFORNIA LATE THURSDAY. UNSETTLED, SOUTHERLY FLOW AHEAD OF THIS
SYSTEM WILL BRING MOISTURE OVER THE ZONES AND THE CHANCE OF
PRECIPITATION WILL INCREASE...ALONG WITH THE POSSIBILITY OF A
THUNDERSTORM OR TWO. MOISTURE AND INSTABILITY WILL INCREASE
SIGNIFICANTLY OVER THE SOUTHWEST ZONES FRIDAY AND A PUSH OF CANADIAN
AIR AT THE SURFACE ACROSS THE BORDER COULD BRING ADDITIONAL CHANCES
FOR SHOWERS AND THUNDERSTORMS. THIS MOISTURE WILL DRIFT NORTHWARD
SATURDAY AND ALL BUT THE EXTREME NORTHERN PORTIONS OF THE CWA WILL
REMAIN MOIST AND UNSETTLED. TEMPERATURES WILL BEGIN THE PERIOD ABOVE
NORMALS AND CONTINUE TO TREND HIGHER THROUGH THURSDAY. TEMPERATURES
WILL COOL AGAIN UNDER FRIDAY AND SATURDAY BUT CONTINUE ABOVE
SEASONAL NORMALS. ZELZER

&&

.AVIATION...UPDATED 1112Z.

HIGH PRESSURE IS BUILDING ALOFT AND THE AIRMASS IS DRYING. MID-LEVEL
CLOUDS REMAIN OVER PORTIONS OF THE REGION, INCLUDING KLWT, BUT ARE
EXPECTED TO DISSIPATE BY 18Z. LIGHT SURFACE WINDS AND VFR CONDITIONS
WILL PREVAIL THROUGH THE NEXT 24 HOURS.

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  61  36  70  40 /   0   0   0   0
CTB  62  35  70  38 /   0   0   0   0
HLN  63  38  72  41 /   0   0   0   0
BZN  61  32  68  36 /   0   0   0   0
WEY  52  28  57  30 /   0   0   0   0
DLN  59  33  66  37 /   0   0   0   0
HVR  65  38  72  40 /   0   0   0   0
LWT  60  36  67  40 /   0   0   0   0

&&

.TFX WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

$$

WEATHER.GOV/GREATFALLS


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