Alert archive / Montana / Wind Chill Warnings in 2009
Wind Chill Warning 1, NWS Great Falls, MT
NWS Great Falls, MT issued this wind chill warning at Dec 14, 2009, 7:01 PM MST. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 14, 2009, 7:01 PM MST (02:01 UTC)
- Expired
- Dec 15, 2009, 4:01 AM MST
- In force
- 9 hr
- Issued by
- NWS Great Falls, MT
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS45 KTFX 150201 WSWTFX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE GREAT FALLS MT 701 PM MST MON DEC 14 2009 MTZ050-051-151200- /O.NEW.KTFX.WC.W.0001.091215T0201Z-091215T1200Z/ JUDITH BASIN-FERGUS- INCLUDING THE FOLLOWING LOCATIONS...STANFORD...LEWISTOWN... LEWISTOWN DIVIDE 701 PM MST MON DEC 14 2009 ...WIND CHILL WARNING IN EFFECT UNTIL 5 AM MST TUESDAY... THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A WIND CHILL WARNING...WHICH IS IN EFFECT UNTIL 5 AM MST TUESDAY. * WINDS WILL INCREASE ACROSS SOUTHERN PORTIONS OF JUDITH BASIN AND FERGUS COUNTIES THIS EVENING AS SOUTHERLY FLOW INCREASES THROUGH JUDITH GAP. * WIND CHILL VALUES OF 35 BELOW ZERO TO 55 BELOW ZERO ARE EXPECTED THROUGH EARLY TUESDAY MORNING. * LOCATIONS AFFECTED INCLUDE: STANFORD...LEWISTOWN...LEWISTOWN DIVIDE...HOBSON...AND U.S. 191 BETWEEN JUDITH GAP AND EDDIES CORNER. * GUSTY WINDS WILL ALSO CAUSE AREAS OF BLOWING AND DRIFTING SNOW WHICH MAY REDUCE VISIBILITIES TO LESS THAN ONE MILE AT TIMES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$
1 follow-up statement
000 WWUS45 KTFX 151101 WSWTFX URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE GREAT FALLS MT 401 AM MST TUE DEC 15 2009 MTZ050-051-151215- /O.CAN.KTFX.WC.W.0001.000000T0000Z-091215T1200Z/ JUDITH BASIN-FERGUS- INCLUDING THE FOLLOWING LOCATIONS...STANFORD...LEWISTOWN... LEWISTOWN DIVIDE 401 AM MST TUE DEC 15 2009 ...WIND CHILL WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS CANCELLED THE WIND CHILL WARNING. TEMPERATURES HAVE RISEN AND WINDS HAVE DECREASED SIGNIFICANTLY AND WIND CHILL VALUES ARE NO LONGER CONSISTENTLY REACHING DANGEROUS LEVELS. $$
What forecasters said that day
The local office's own words before this wind chill warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Great Falls, MT wrote its last area forecast discussion before this wind chill warning went out at Dec 14, 5:10 PM MST, 1 hour 51 minutes earlier.
Area forecast discussion, Dec 14, 5:10 PM MST, 1 hour 51 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GREAT FALLS MT 510 PM MST MON DEC 14 2009 ...UPDATED AVIATION DISCUSSION... .DISCUSSION... TONIGHT THROUGH WEDNESDAY...COLD ARCTIC AIRMASS REMAINS IN PLACE OVER THE PLAINS OF NORTH CENTRAL MT THIS AFTERNOON HOWEVER EXITING UPPER LEVEL TROUGH AND INCREASING WESTERLY FLOW ALOFT WILL BEGIN THE PROCESS OF SWEEPING OUT THE ARCTIC AIR LATER THIS EVENING. MINIMUM TEMPS TONIGHT WILL LIKELY OCCUR EARLY THIS EVENING BEFORE WINDS ARRIVE LATE THIS EVENING BEGINNING THE GRADUAL WARMUP. WINDS CONTINUE TO INCREASE ON TUESDAY FOR MORE SIGNIFICANT WARMING WITH MOST AREAS SEEING TEMPS RISE TO NEAR OR ABOVE FREEZING AS WINDS VEER MORE AROUND TO THE SW. COMBINATION OF INCREASING WINDS AND THE STILL RELATIVELY FRESH SNOWPACK COULD CREATE SOME AREAS OF REDUCED VISIBILITY IN BLOWING AND DRIFTING SNOW TUESDAY MORNING. PACIFIC SYSTEM CURRENTLY MOVING ONSHORE WILL MOVE INTO THE NORTHERN ROCKIES TUESDAY AND TUESDAY NIGHT WITH ANOTHER SYSTEM MOVING ACROSS THE REGION ON WEDNESDAY. THE MOIST WESTERLY FLOW WILL ALLOW FOR CONTINUED WARMING ON WEDNESDAY. PRECIPITATION WILL MAINLY BE CONFINED TO THE WESTERN AND SW MTNS TUESDAY AND WEDNESDAY WITH DOWNSLOPE WINDS LIMITING PRECIPITATION CHANCES IN THE PLAINS. HOENISCH WEDNESDAY NIGHT THROUGH SATURDAY NIGHT...THE ECMWF AND GFS MODEL RUNS ARE NOT IN VERY GOOD AGREEMENT WITH UPPER AIR TRENDS AND FORECAST PRECIPITATION DURING THE PERIOD. ECMWF MODEL RUN BRINGS A STRONGER WEATHER DISTURBANCE THROUGH THE AREA ON THURSDAY THAN THE GFS MODEL RUN. DESPITE THIS DIFFERENCE BOTH MODELS ARE MOSTLY DRY OVER THE PLAINS. CONTINUED THE INHERITED IDEA OF HOLDING ON TO A SLIGHT CHANCE OF PRECIPITATION FOR THE EAST SLOPES OF THE ROCKY MOUNTAINS WITH OF COURSE HIGHER CHANCES OF PRECIPITATION OVER THE MOUNTAINS. FOR THURSDAY NIGHT THROUGH SATURDAY NIGHT EXPECT THE AREA TO BE UNDER THE INFLUENCE OF AN UPPER RIDGE OVER THE PACIFIC NORTHWEST. THERE IS THE POSSIBILITY THAT THIS UPPER RIDGE COULD MOVE OVER THE FORECAST AREA SATURDAY NIGHT. MODELS DIFFER ON MOISTURE FORECAST IN THE NORTHWEST FLOW ALOFT OVER THE AREA. THE ECMWF TENDS TO HAVE A STRONGER UPPER RIDGE AND HENCE IS DRIER THAN THE GFS. THE INHERITED FORECAST SEEMS TO BE A NICE COMPROMISE BETWEEN THE TWO SOLUTIONS IN THAT IT KEEPS A CHANCE OF SNOW OVER THE MOUNTAINS WHILE THE PLAINS AND VALLEYS ARE MOSTLY DRY. BLANK SUNDAY THROUGH MONDAY...MODEL DIFFERENCES ONCE AGAIN COMPLICATE THE FORECAST DURING THIS PERIOD. A BLENDED SOLUTION WAS USED LEANING TOWARD THE ECMWF WHICH STILL SHOWS BETTER CONSISTENCY. A WEAK UPPER LEVEL RIDGE OVER MONTANA SUNDAY IS FLATTENED BY A SERIES OF DISTURBANCES RIDING OVER THE RIDGE. A WEAK DRY BACKDOOR COLD FRONT LIES OVER OUR NORTHEAST ZONES. MOSTLY CLOUDY SKIES ARE EXPECTED WITH SCATTERED SNOW SHOWERS OVER THE MOUNTAINS AND A FEW RAIN OR SNOW SHOWERS SPREADING TO SOME THE THE PLAINS AND VALLEYS SUNDAY. DOWNSLOPE WIND WILL HELP LIMIT THE CHANCE OF PRECIPITATION OVER THE PLAINS AND LARGER VALLEYS SATURDAY. TEMPERATURES WILL COOL TO NEAR SEASONAL AVERAGES. EK && .AVIATION... UPDATED 0010Z. UPPER LEVEL RIDGE WILL BUILD OVER WESTERN AND CENTRAL MONTANA TONIGHT BUT IS FLATTENED ON TUESDAY AS SHORTWAVE ENERGY MOVES THROUGH THE REGION. COLD ARCTIC AIRMASS OVER CENTRAL MONTANA WILL MOVE RAPIDLY EAST OVERNIGHT WITH SOUTHWEST WINDS INCREASING ACROSS THE FORECAST AREA...ESPECIALLY BY 18Z TUESDAY. VFR CONDITIONS ARE EXPECTED AT ALL TERMINALS. MPJ && .PRELIMINARY POINT TEMPS/POPS... GTF -11 33 26 42 / 10 10 10 10 CTB -10 31 21 41 / 10 10 0 10 HLN -3 34 18 38 / 20 10 10 30 BZN 1 33 17 36 / 20 20 10 30 WEY 11 24 15 31 / 40 50 60 50 DLN 14 33 21 38 / 10 10 10 20 HVR -24 15 10 32 / 10 10 10 20 LWT -13 32 20 40 / 20 10 10 20 && .TFX WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...HOENISCH LONG TERM...BLANK AVIATION...MPJ WEATHER.GOV/GREATFALLS
Hazardous weather outlook, Dec 14, 2:52 PM MST, 4 hours 9 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREAT FALLS MT 252 PM MST MON DEC 14 2009 MTZ008-011-015-047-052>055-152200- BEAVERHEAD-HILL-MADISON-BLAINE-JEFFERSON-BROADWATER-MEAGHER- GALLATIN- 252 PM MST MON DEC 14 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL MONTANA AND SOUTHWEST MONTANA. .DAY ONE...THIS AFTERNOON AND TONIGHT THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MTZ009-010-012>014-044>046-048>051-152200- NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-CASCADE-CHOUTEAU- CENTRAL AND SOUTHERN LEWIS AND CLARK-TOOLE-LIBERTY- EASTERN PONDERA-SOUTHERN ROCKY MOUNTAIN FRONT-EASTERN TETON- JUDITH BASIN-FERGUS- 252 PM MST MON DEC 14 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL MONTANA...NORTH CENTRAL MONTANA AND SOUTHWEST MONTANA. .DAY ONE...THIS AFTERNOON AND TONIGHT SOUTH TO SOUTHWEST WINDS WILL DEVELOP LATE THIS EVENING AND INCREASE 10 TO 20 MPH AFTER MIDNIGHT TONIGHT. THIS MAY CREATE AREAS OF BLOWING AND DRIFTING SNOW AND LOCALLY REDUCED VISIBILITIES. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY SOUTH TO SOUTHWEST WINDS WILL CONTINUE TO INCREASE TO 15 TO 30 MPH WITH GUSTS TO 40 MPH BY TUESDAY AFTERNOON. AREAS OF BLOWING AND DRIFTING SNOW MAY LOCALLY REDUCE VISIBILITIES THROUGH TUESDAY AFTERNOON. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
In the hours before
Local storm report, Dec 14, 5:52 PM MST, 1 hour 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
552 PM MST MON DEC 14 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0545 PM HEAVY SNOW LINCOLN 46.96N 112.68W
12/14/2009 M12.0 INCH LEWIS AND CLARK MT CO-OP OBSERVER
MEASURED 24-HOUR SNOWFALL OF 12.0 INCHES. ELEVATION 4575
FEET.
&&
MLSLocal storm report, Dec 14, 5:56 PM MST, 1 hour 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
556 PM MST MON DEC 14 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0545 PM SNOW 18 SE GALLATIN GATEWAY 45.41N 110.93W
12/14/2009 M9.0 INCH GALLATIN MT MESONET
SHOWER FALLS SNOTEL MEASURES 24-HOUR SNOWFALL OF 9.0
INCHES. ELEVATION 8100 FEET.
&&
MLSLocal storm report, Dec 14, 6:53 PM MST, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
653 PM MST MON DEC 14 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0650 PM EXTR WIND CHILL HOBSON 47.00N 109.87W
12/14/2009 M-52 F JUDITH BASIN MT CO-OP OBSERVER
COOPERATIVE OBSERVER REPORTS 10 TO 20 MPH WINDS PRODUCING
WIND CHILLS AS COLD AS 52 DEGREES BELOW ZERO.
&&
MPJNearby
Wind Chill Warnings in Montana, 2009Every wind chill warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.