Area Forecast Discussion
Issued by NWS Great Falls, MT

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FXUS65 KTFX 012030
AFDTFX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
230 PM MDT SUN MAY 1 2016

.DISCUSSION...

TONIGHT THROUGH TUESDAY...QUIET WEATHER WILL PREVAIL THROUGH THE
SHORT TERM PERIOD AS HIGH PRESSURE ALOFT BUILDS OVER WESTERN AND
CENTRAL MONTANA. MOSTLY CLEAR SKIES WILL PREVAIL THROUGH THE
FORECAST PERIOD WITH NO PRECIPITATION EXPECTED. AFTERNOON HIGHS
WILL CLIMB INTO THE MID 60S TO MID 70S ON MONDAY AND THE UPPER 60S
TO NEAR 80 ON TUESDAY. WINDS WILL REMAIN LIGHT TO BREEZY EACH DAY
AS WELL. MPJ

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 1727Z.

VFR WILL PREVAIL THROUGH 18Z/MON AS A HIGH PRESSURE RIDGE DOMINATES.
SURFACE WINDS WILL BE LIGHT AND VARIABLE. JASZKA

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  37  71  41  78 /   0   0   0   0
CTB  36  71  39  78 /   0   0   0   0
HLN  38  72  42  79 /   0   0   0   0
BZN  32  69  36  76 /   0   0   0   0
WEY  28  58  32  62 /   0   0   0   0
DLN  34  67  38  73 /   0   0   0   0
HVR  39  73  42  80 /   0   0   0   0
LWT  38  68  41  75 /   0   0   0   0

&&

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

$$

WEATHER.GOV/GREATFALLS



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