High Wind Watch 17, NWS Great Falls, MT

802 
WWUS75 KTFX 102024
NPWTFX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
224 PM MDT MON OCT 10 2011

MTZ009-048-110500-
/O.UPG.KTFX.HW.A.0017.111011T0600Z-111012T1200Z/
/O.NEW.KTFX.HW.W.0036.111011T0600Z-111013T0000Z/
NORTHERN ROCKY MOUNTAIN FRONT-SOUTHERN ROCKY MOUNTAIN FRONT-
INCLUDING THE FOLLOWING LOCATIONS...BROWNING...MARIAS PASS...
LOGAN PASS...CHOTEAU
224 PM MDT MON OCT 10 2011

...HIGH WIND WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 6 PM MDT
WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A HIGH
WIND WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 6 PM
MDT WEDNESDAY. THE HIGH WIND WATCH HAS BEEN REPLACED BY THIS
WARNING. 

* TIMING AND MAIN IMPACT: STRONG WINDS WILL DEVELOP TONIGHT AND
  CONTINUE THROUGH TUESDAY AFTERNOON AS SEVERAL WEATHER
  DISTURBANCES MOVE QUICKLY EAST ACROSS THE NORTHERN ROCKIES.

* WINDS: WEST WINDS 35 TO 45 MPH WITH GUSTS TO 60 MPH. LOCAL
  GUSTS IN EXCESS OF 70 MPH ARE POSSIBLE THROUGH MOUNTAIN 
  PASSES. THIS INCLUDES LOGAN PASS AND AREAS ALONG THE 
  IMMEDIATE EAST SLOPES OF THE ROCKY MOUNTAIN FRONT. 

* LOCATIONS AFFECTED INCLUDE: CHOTEAU...BROWNING...MARIAS
  PASS...LOGAN PASS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED
OR OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS
OF 58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE.

&&

$$

074 
WWUS75 KTFX 102041 CCA
NPWTFX

URGENT - WEATHER MESSAGE...CORRECTED
NATIONAL WEATHER SERVICE GREAT FALLS MT
240 PM MDT MON OCT 10 2011

MTZ009-048-110530-
/O.UPG.KTFX.HW.A.0017.111011T0600Z-111012T1200Z/
/O.COR.KTFX.HW.W.0036.111011T0600Z-111013T0000Z/
NORTHERN ROCKY MOUNTAIN FRONT-SOUTHERN ROCKY MOUNTAIN FRONT-
INCLUDING THE FOLLOWING LOCATIONS...BROWNING...MARIAS PASS...
LOGAN PASS...CHOTEAU
240 PM MDT MON OCT 10 2011

...HIGH WIND WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 6 PM MDT
WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A HIGH
WIND WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 6 PM
MDT WEDNESDAY. THE HIGH WIND WATCH HAS BEEN REPLACED BY THIS
WARNING. 

* TIMING AND MAIN IMPACT: STRONG WINDS WILL DEVELOP TONIGHT AND
  CONTINUE THROUGH WEDNESDAY AFTERNOON AS SEVERAL WEATHER
  DISTURBANCES MOVE QUICKLY EAST ACROSS THE NORTHERN ROCKIES.

* WINDS: WEST WINDS 35 TO 45 MPH WITH GUSTS TO 60 MPH. LOCAL
  GUSTS IN EXCESS OF 70 MPH ARE POSSIBLE THROUGH MOUNTAIN 
  PASSES. THIS INCLUDES LOGAN PASS AND AREAS ALONG THE 
  IMMEDIATE EAST SLOPES OF THE ROCKY MOUNTAIN FRONT. 

* LOCATIONS AFFECTED INCLUDE: CHOTEAU...BROWNING...MARIAS
  PASS...LOGAN PASS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED
OR OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS
OF 58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE.

&&

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
317 AM MDT MON OCT 10 2011

.DISCUSSION...

TODAY THROUGH WEDNESDAY...THE WEAK UPPER LEVEL RIDGE POSITIONED OVER
CENTRAL MT THIS MORNING WILL BE BROKEN DOWN TODAY AS THE FIRST IN A
SERIES OF SHORTWAVES MOVES INTO THE NORTHERN ROCKIES AHEAD OF AN
INCOMING STRONG PACIFIC UPPER LEVEL JET. HIGH CLOUDS WILL INCREASE TODAY
WITH PRECIPITATION SPREADING INTO AREAS ALONG THE CONTINENTAL DIVIDE
BY LATER THIS AFTERNOON. THE UPPER LEVEL JET COMES ONSHORE TONIGHT
WITH A STRONGER DISTURBANCE ALOFT AND PACIFIC COLD FRONT RACING
ACROSS THE THE FORECAST AREA THIS EVENING. THIS WILL BEGIN A PERIOD
OF MOIST AND UNSETTLED WESTERLY FLOW CONTINUING THROUGH TUESDAY
NIGHT AS SEVERAL ADDITIONAL PIECES OF ENERGY RIPPLE THROUGH THE
FLOW. BULK OF THE PRECIPITATION WILL BE FOCUSED OVER THE MTNS WITH
BEST CHANCE FOR MORE WIDESPREAD SHOWERS OCCURRING WITH THE PASSAGE
OF THE FRONT THIS EVENING AND AGAIN AS THE UPPER LEVEL JET AXIS
LIFTS THROUGH THE AREA TUESDAY AFTERNOON. SNOW LEVELS WILL BEGIN IN
THE 7000-8000FT RANGE TODAY...LOWERING TO 6000-7000FT LATE TONIGHT
THROUGH TUESDAY WITH HIGHER MTNS ALONG THE CONTINENTAL DIVIDE NORTH
OF ROGERS PASS TO GLACIER PARK SEEING THE BAST CHANCE OF MEASURABLE
SNOW ACCUMULATIONS OVER THE NEXT SEVERAL DAYS. GUSTY WINDS WILL
DEVELOP TONIGHT IN ASSOCIATION WITH THE FRONTAL PASSAGE WITH WINDS
ALOFT REMAINING STRONG THROUGH TUESDAY NIGHT AS ADDITIONAL
DISTURBANCES MOVE THROUGH UNDER THE UPPER LEVEL JET. THIS WILL BRING
THE POSSIBILITY OF HIGH WINDS TO AREAS ALONG THE ROCKY MTN FRONT
WHERE A HIGH WIND WATCH WILL BE IN EFFECT. HOENISCH

WEDNESDAY NIGHT THROUGH MONDAY...THE REGION WILL BE UNDER THE
INFLUENCE OF A BROAD UPPER LEVEL HIGH PRESSURE RIDGE WEDNESDAY
NIGHT.  HOWEVER...SEVERAL DISTURBANCES WILL BE MOVING THROUGH THIS
RIDGE AND MAY CAUSE SOME ADDITIONAL SKY COVER AS WELL AS SHOWERS
OVER THE ROCKIES. THE NEXT REAL CHANCE OF PRECIPITATION ACROSS THE
REGION WILL DEVELOP AS A LOW PRESSURE TROF APPROACHES THE WEST COAST
THURSDAY NIGHT. MOISTURE AHEAD OF THIS SYSTEM WILL SPREAD ACROSS THE
ROCKIES BUT DOWNSLOPE FLOW ACROSS THE ROCKIES WILL KEEP THE PLAINS
DRY WITH MAINLY SOUTHWEST MONTANA RECEIVING PRECIPITATION. THE GFS
AND ECMWF STILL ARE SHOWING LARGE DIFFERENCES IN TIMING OF THE TROF
MOVEMENT. THE GFS HAS IT MOVING THROUGH THE PACIFIC NORTHWEST FRIDAY
WITH THE CHANCE OF PRECIPITATION SPREADING ACROSS ALL PARTS OF
THE CWA. THIS IS MUCH FASTER THAN THE PATTERN SHOWN BY THE GFS 24
HOURS PREVIOUS AND THE CURRENT ECMWF. THE LATEST GFS SOLUTION WOULD
BRING AN ASSOCIATED COLD FRONT AND SIGNIFICANTLY COOLER TEMPS TO THE
REGION BY SATURDAY...TEMPS DROPPING IN SOME LOCATIONS BY SATURDAY TO
AROUND 10 DEGREES BELOW NORMALS. BUT WITH THE LACK OF CONSISTENCY
BETWEEN MODELS AND MODEL RUNS...WILL NOT MAKE ANY LARGE CHANGES TO
CURRENT FORECAST TEMPS UNTIL MODELS COME INTO BETTER AGREEMENT.
ZELZER

&&

.AVIATION...
UPDATED 0450Z.
VFR CONDITIONS WILL PREVAIL FOR THE NEXT 24 HOURS AS A WEAK HIGH
PRESSURE RIDGE ALOFT IS USHERED OUT OF THE AREA BY A FAST MOVING
PACIFIC SYSTEM. WINDS WILL GENERALLY BE LIGHT OVERNIGHT WITH TERRAIN
FLOW DOMINATING THE WINDS. CLOUDS WILL GENERALLY INCREASE AND LOWER
OVERNIGHT AS THE NEXT SYSTEM NEARS THE AREA. WINDS WILL BECOME GUSTY
AGAIN TOMORROW AFTERNOON ESPECIALLY ACROSS MUCH OF THE NORTHERN
PLAINS. SOME MOUNTAIN OBSCURATIONS AND MOUNTAIN SHOWERS ARE POSSIBLE
ON AND AFTER 1600Z ESPECIALLY ALONG THE ROCKY MOUNTAIN FRONT. SUK

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  65  46  60  43 /   0  30  30  20
CTB  59  41  56  39 /  10  20  10  10
HLN  63  41  59  40 /  10  40  40  20
BZN  63  38  59  36 /   0  40  50  30
WEY  48  32  46  25 /  10  80  80  40
DLN  61  40  59  35 /  10  30  30  20
HVR  67  42  63  39 /   0  10  20  10
LWT  65  40  59  37 /   0  20  30  20

&&

.TFX WATCHES/WARNINGS/ADVISORIES...
HIGH WIND WATCH FROM LATE TONIGHT THROUGH LATE TUESDAY NIGHT
NORTHERN ROCKY MOUNTAIN FRONT...SOUTHERN ROCKY MOUNTAIN FRONT.

&&

WEATHER.GOV/GREATFALLS