Alert archive / Montana / Winter Storm Warnings in 2011

Winter Storm Warning 24, NWS Great Falls, MT

May 29, 2011

NWS Great Falls, MT issued this winter storm warning at May 29, 2011, 4:24 AM MDT. It took effect at May 29, 2011, 6:00 AM MDT. It was in force for 42 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
May 29, 2011, 4:24 AM MDT (10:24 UTC)
In effect from
May 29, 2011, 6:00 AM MDT
Expired
May 31, 2011, 12:00 AM MDT
In force
42 hr
Issued by
NWS Great Falls, MT

The text

As transmitted, in the capitals the NWS used until 2016.

655 
WWUS45 KTFX 291024
WSWTFX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
424 AM MDT SUN MAY 29 2011

MTZ050-054-292100-
/O.UPG.KTFX.WS.A.0010.110530T0000Z-110531T0600Z/
/O.NEW.KTFX.WS.W.0024.110530T0000Z-110531T0600Z/
JUDITH BASIN-MEAGHER-
424 AM MDT SUN MAY 29 2011

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO
MIDNIGHT MDT MONDAY NIGHT FOR ELEVATIONS ABOVE 5500 FEET...

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A WINTER
STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET FOR HEAVY SNOW...WHICH
IS IN EFFECT FROM 6 PM THIS EVENING TO MIDNIGHT MDT MONDAY NIGHT.
THE WINTER STORM WATCH IS NO LONGER IN EFFECT.

* TIMING AND MAIN IMPACT: SNOW...HEAVY AT TIMES...WILL DEVELOP IN
  THE MOUNTAINS THIS EVENING AND CONTINUE TO FALL THROUGH MONDAY
  EVENING. SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR WILL BE
  POSSIBLE AT TIMES LATER TONIGHT AND ON MONDAY MORNING.

* SNOW ACCUMULATIONS: TIME OF DAY AND SNOWFALL RATE WILL PLAY A
  LARGE ROLE IN SNOWFALL ACCUMULATIONS IN THIS LATE SEASON STORM.
  HOWEVER THE POTENTIAL EXISTS FOR 10 TO 15 INCHES OF NEW SNOW BY
  MONDAY EVENING FOR ELEVATIONS ABOVE 5500 FEET.

* ELEVATIONS: FOR ELEVATIONS ABOVE 5500 FEET.

* VISIBILITIES: EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN ONE
  HALF MILE AT TIMES ACROSS MOUNTAIN PASSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$

MTZ008-015-055-292100-
/O.UPG.KTFX.WS.A.0010.110529T1200Z-110531T0600Z/
/O.NEW.KTFX.WS.W.0024.110529T1200Z-110531T0600Z/
BEAVERHEAD-MADISON-GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS...BIG HOLE PASS...
CHIEF JOSEPH PASS...MONIDA PASS...RAYNOLDS PASS...
BATTLE RIDGE PASS...BOZEMAN PASS...TARGHEE PASS...
WEST YELLOWSTONE
424 AM MDT SUN MAY 29 2011

...WINTER STORM WARNING IN EFFECT UNTIL MIDNIGHT MDT MONDAY NIGHT
FOR ELEVATIONS ABOVE 5500 FEET...

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A WINTER
STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET FOR HEAVY
SNOW...WHICH IS IN EFFECT UNTIL MIDNIGHT MDT MONDAY NIGHT. THE
WINTER STORM WATCH IS NO LONGER IN EFFECT.

* TIMING AND MAIN IMPACT: SNOW...HEAVY AT TIMES...WILL DEVELOP IN
  THE MOUNTAINS THIS MORNING AND CONTINUE TO FALL THROUGH MONDAY
  EVENING. SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR WILL BE
  POSSIBLE AT TIMES TONIGHT AND INTO EARLY MONDAY MORNING.

* SNOW ACCUMULATIONS: TIME OF DAY AND SNOWFALL RATE WILL PLAY A
  LARGE ROLE IN SNOWFALL ACCUMULATIONS IN THIS LATE SEASON STORM.
  HOWEVER THE POTENTIAL EXISTS FOR 10 TO 15 INCHES OF NEW SNOW BY
  MONDAY EVENING FOR ELEVATIONS ABOVE 5500 FEET.

* ELEVATIONS: FOR ELEVATIONS ABOVE 5500 FEET.

* VISIBILITIES: EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN ONE
  HALF MILE AT TIMES ACROSS MOUNTAIN PASSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$

MTZ012-051-292100-
/O.NEW.KTFX.WS.W.0024.110530T0000Z-110531T0600Z/
CASCADE-FERGUS-
INCLUDING THE FOLLOWING LOCATIONS...KINGS HILL PASS
424 AM MDT SUN MAY 29 2011

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO
MIDNIGHT MDT MONDAY NIGHT FOR ELEVATIONS ABOVE 5500 FEET...

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A WINTER
STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET FOR HEAVY
SNOW...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO MIDNIGHT MDT
MONDAY NIGHT.

* TIMING AND MAIN IMPACT: SNOW...HEAVY AT TIMES...WILL DEVELOP IN
  THE MOUNTAINS THIS EVENING AND CONTINUE TO FALL THROUGH MONDAY
  EVENING. SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR WILL BE
  POSSIBLE AT TIMES LATER TONIGHT AND ON MONDAY MORNING.

* SNOW ACCUMULATIONS: TIME OF DAY AND SNOWFALL RATE WILL PLAY A
  LARGE ROLE IN SNOWFALL ACCUMULATIONS IN THIS LATE SEASON STORM.
  HOWEVER THE POTENTIAL EXISTS FOR 10 TO 15 INCHES OF NEW SNOW BY
  MONDAY EVENING FOR ELEVATIONS ABOVE 5500 FEET.

* ELEVATIONS: FOR ELEVATIONS ABOVE 5500 FEET.

* VISIBILITIES: EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN ONE
  HALF MILE AT TIMES ACROSS MOUNTAIN PASSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$
8 follow-up statements
146 
WWUS45 KTFX 291056
WSWTFX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
456 AM MDT SUN MAY 29 2011

MTZ012-050-051-054-292100-
/O.CON.KTFX.WS.W.0024.110530T0000Z-110531T0600Z/
CASCADE-JUDITH BASIN-FERGUS-MEAGHER-
INCLUDING THE FOLLOWING LOCATIONS...KINGS HILL PASS
456 AM MDT SUN MAY 29 2011

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING
TO MIDNIGHT MDT MONDAY NIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT FROM 6 PM THIS EVENING TO MIDNIGHT MDT MONDAY NIGHT. 

* TIMING AND MAIN IMPACT: SNOW...HEAVY AT TIMES...WILL DEVELOP 
  IN THE MOUNTAINS THIS EVENING AND CONTINUE TO FALL THROUGH 
  MONDAY EVENING. SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR 
  WILL BE POSSIBLE AT TIMES LATER TONIGHT AND ON MONDAY 
  MORNING.

* SNOW ACCUMULATIONS: TIME OF DAY AND SNOWFALL RATE WILL PLAY A 
  LARGE ROLE IN SNOWFALL ACCUMULATIONS IN THIS LATE SEASON 
  STORM. HOWEVER THE POTENTIAL EXISTS FOR 10 TO 15 INCHES OF 
  NEW SNOW BY MONDAY EVENING FOR ELEVATIONS ABOVE 5500 FEET.

* ELEVATIONS: FOR ELEVATIONS ABOVE 5500 FEET.

* VISIBILITIES: EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN
  ONE HALF MILE AT TIMES ACROSS MOUNTAIN PASSES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$

MTZ008-015-055-292100-
/O.CON.KTFX.WS.W.0024.110529T1200Z-110531T0600Z/
BEAVERHEAD-MADISON-GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS...BIG HOLE PASS...
CHIEF JOSEPH PASS...MONIDA PASS...RAYNOLDS PASS...
BATTLE RIDGE PASS...BOZEMAN PASS...TARGHEE PASS...
WEST YELLOWSTONE
456 AM MDT SUN MAY 29 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
MONDAY NIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT UNTIL MIDNIGHT MDT MONDAY NIGHT. 

* TIMING AND MAIN IMPACT: SNOW...HEAVY AT TIMES...WILL DEVELOP 
  IN THE MOUNTAINS THIS MORNING AND CONTINUE TO FALL THROUGH 
  MONDAY EVENING. SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR 
  WILL BE POSSIBLE AT TIMES TONIGHT AND INTO EARLY MONDAY 
  MORNING.

* SNOW ACCUMULATIONS: TIME OF DAY AND SNOWFALL RATE WILL PLAY A 
  LARGE ROLE IN SNOWFALL ACCUMULATIONS IN THIS LATE SEASON 
  STORM. HOWEVER THE POTENTIAL EXISTS FOR 10 TO 15 INCHES OF 
  NEW SNOW BY MONDAY EVENING FOR ELEVATIONS ABOVE 5500 FEET.

* ELEVATIONS: FOR ELEVATIONS ABOVE 5500 FEET.

* VISIBILITIES: EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN
  ONE HALF MILE AT TIMES ACROSS MOUNTAIN PASSES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$
808 
WWUS45 KTFX 292047
WSWTFX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
247 PM MDT SUN MAY 29 2011

MTZ012-050-051-054-300500-
/O.CON.KTFX.WS.W.0024.110530T0000Z-110531T0600Z/
CASCADE-JUDITH BASIN-FERGUS-MEAGHER-
INCLUDING THE FOLLOWING LOCATIONS...KINGS HILL PASS
247 PM MDT SUN MAY 29 2011

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING
TO MIDNIGHT MDT MONDAY NIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT FROM 6 PM THIS EVENING TO MIDNIGHT MDT MONDAY NIGHT. 

* TIMING AND MAIN IMPACT: SNOW...HEAVY AT TIMES...WILL DEVELOP IN
  THE MOUNTAINS TONIGHT AND CONTINUE TO FALL THROUGH MONDAY EVENING.
  SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR WILL BE POSSIBLE AT
  TIMES LATER TONIGHT AND ON MONDAY MORNING.

* SNOW ACCUMULATIONS: TIME OF DAY AND SNOWFALL RATE WILL PLAY A 
  LARGE ROLE IN SNOWFALL ACCUMULATIONS IN THIS LATE SEASON 
  STORM. HOWEVER THE POTENTIAL EXISTS FOR 10 TO 15 INCHES OF 
  NEW SNOW BY MONDAY EVENING FOR ELEVATIONS ABOVE 5500 FEET.

* ELEVATIONS: FOR ELEVATIONS ABOVE 5500 FEET.

* VISIBILITIES: EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN 
  ONE HALF MILE AT TIMES ACROSS MOUNTAIN PASSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$

MTZ008-015-055-300500-
/O.CON.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
BEAVERHEAD-MADISON-GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS...BIG HOLE PASS...
CHIEF JOSEPH PASS...MONIDA PASS...RAYNOLDS PASS...
BATTLE RIDGE PASS...BOZEMAN PASS...TARGHEE PASS...
WEST YELLOWSTONE
247 PM MDT SUN MAY 29 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
MONDAY NIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT UNTIL MIDNIGHT MDT MONDAY NIGHT. 

* TIMING AND MAIN IMPACT: SNOW...HEAVY AT TIMES...WILL CONTINUE IN
  THE MOUNTAINS THROUGH MONDAY AFTERNOON. SNOWFALL RATES OF 1 TO 2 INCHES
  PER HOUR WILL BE POSSIBLE AT TIMES TONIGHT AND INTO EARLY MONDAY
  MORNING.

* SNOW ACCUMULATIONS: TIME OF DAY AND SNOWFALL RATE WILL PLAY A 
  LARGE ROLE IN SNOWFALL ACCUMULATIONS IN THIS LATE SEASON 
  STORM. HOWEVER THE POTENTIAL EXISTS FOR 10 TO 15 INCHES OF 
  NEW SNOW BY MONDAY EVENING FOR ELEVATIONS ABOVE 5500 FEET.

* ELEVATIONS: FOR ELEVATIONS ABOVE 5500 FEET.

* VISIBILITIES: EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN 
  ONE HALF MILE AT TIMES ACROSS MOUNTAIN PASSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$
457 
WWUS45 KTFX 300341
WSWTFX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
941 PM MDT SUN MAY 29 2011

MTZ012-050-051-054-301200-
/O.CON.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
CASCADE-JUDITH BASIN-FERGUS-MEAGHER-
INCLUDING THE FOLLOWING LOCATIONS...KINGS HILL PASS
941 PM MDT SUN MAY 29 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
MONDAY NIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT UNTIL MIDNIGHT MDT MONDAY NIGHT. 

* TIMING AND MAIN IMPACT: SNOW WILL BECOME HEAVY AT TIMES IN THE
  MOUNTAINS LATE TONIGHT AND CONTINUE TO THROUGH MONDAY AFTERNOON
  BEFORE DIMINISHING MONDAY EVENING. SNOWFALL RATES OF 1 TO 2
  INCHES PER HOUR WILL BE POSSIBLE AT TIMES ON MONDAY. TRAVELERS
  SHOULD BE PREPARED FOR WET AND SLUSHY ACCUMULATIONS ACROSS
  MOUNTAIN PASSES ALONG WITH REDUCED VISIBILITY IN HEAVY WET
  SNOW.

* SNOW ACCUMULATIONS: TIME OF DAY AND SNOWFALL RATE WILL PLAY A 
  LARGE ROLE IN SNOWFALL ACCUMULATIONS IN THIS LATE SEASON 
  STORM. HOWEVER THE POTENTIAL EXISTS FOR 10 TO 15 INCHES OF 
  NEW SNOW BY MONDAY EVENING FOR ELEVATIONS ABOVE 5500 FEET.

* ELEVATIONS: FOR ELEVATIONS ABOVE 5500 FEET.

* VISIBILITIES: EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN 
  ONE HALF MILE AT TIMES ACROSS MOUNTAIN PASSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$

MTZ008-015-055-301200-
/O.CON.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
BEAVERHEAD-MADISON-GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS...BIG HOLE PASS...
CHIEF JOSEPH PASS...MONIDA PASS...RAYNOLDS PASS...
BATTLE RIDGE PASS...BOZEMAN PASS...TARGHEE PASS...
WEST YELLOWSTONE
941 PM MDT SUN MAY 29 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
MONDAY NIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT UNTIL MIDNIGHT MDT MONDAY NIGHT. 

* TIMING AND MAIN IMPACT: SNOW...HEAVY AT TIMES...WILL CONTINUE IN
  THE MOUNTAINS THROUGH MONDAY AFTERNOON. SNOWFALL RATES OF 1 TO 2
  INCHES PER HOUR WILL BE POSSIBLE AT TIMES TONIGHT AND INTO EARLY
  MONDAY MORNING. TRAVELERS SHOULD BE PREPARED FOR WET AND SLUSHY
  ACCUMULATIONS ACROSS MOUNTAIN PASSES ALONG WITH REDUCED
  VISIBILITY IN HEAVY WET SNOW.


* SNOW ACCUMULATIONS: TIME OF DAY AND SNOWFALL RATE WILL PLAY A 
  LARGE ROLE IN SNOWFALL ACCUMULATIONS IN THIS LATE SEASON 
  STORM. HOWEVER THE POTENTIAL EXISTS FOR 10 TO 15 INCHES OF 
  NEW SNOW BY MONDAY EVENING FOR ELEVATIONS ABOVE 5500 FEET.

* ELEVATIONS: FOR ELEVATIONS ABOVE 5500 FEET.

* VISIBILITIES: EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN 
  ONE HALF MILE AT TIMES ACROSS MOUNTAIN PASSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$
647 
WWUS45 KTFX 301033
WSWTFX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
433 AM MDT MON MAY 30 2011

MTZ012-050-051-054-302100-
/O.CON.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
CASCADE-JUDITH BASIN-FERGUS-MEAGHER-
INCLUDING THE FOLLOWING LOCATIONS...KINGS HILL PASS
433 AM MDT MON MAY 30 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT UNTIL MIDNIGHT MDT TONIGHT. 

* TIMING AND MAIN IMPACT: SNOW...HEAVY AT TIMES IN THE MOUNTAINS
  WILL CONTINUE TO THROUGH THIS AFTERNOON BEFORE DIMINISHING THIS
  EVENING. SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR WILL BE
  POSSIBLE AT TIMES THROUGH TODAY. TRAVELERS SHOULD BE PREPARED
  FOR SNOW COVERED AND SLIPPERY ROADS ACROSS MOUNTAIN
  PASSES...ALONG WITH REDUCED VISIBILITY IN HEAVY WET SNOW.

* SNOW ACCUMULATIONS: TOTAL SNOW ACCUMULATIONS OF 10 TO 15 INCHES
  ARE EXPECTED ABOVE 5500 FEET.

* VISIBILITIES: EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN 
  ONE HALF MILE AT TIMES ACROSS MOUNTAIN PASSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW
ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN
EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$

MTZ008-015-055-302100-
/O.CON.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
BEAVERHEAD-MADISON-GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS...BIG HOLE PASS...
CHIEF JOSEPH PASS...MONIDA PASS...RAYNOLDS PASS...
BATTLE RIDGE PASS...BOZEMAN PASS...TARGHEE PASS...
WEST YELLOWSTONE
433 AM MDT MON MAY 30 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT UNTIL MIDNIGHT MDT TONIGHT. 

* TIMING AND MAIN IMPACT: SNOW WILL CONTINUE IN THE MOUNTAINS OF
  SOUTHWEST MONTANA THROUGH THE EVENING HOURS TODAY. EXPECT
  SNOWFALL RATES UP TO 1 INCH PER HOUR TIMES THIS MORNING.
  TRAVELERS SHOULD BE PREPARED FOR SNOW COVERED AND SLIPPERY ROADS
  ACROSS MOUNTAIN PASSES...ALONG WITH REDUCED VISIBILITY IN HEAVY
  WET SNOW.

* SNOW ACCUMULATIONS: TOTAL SNOW ACCUMULATIONS OF 10 TO 15 INCHES
  ARE EXPECTED ABOVE 5500 FEET.

* VISIBILITIES: EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN 
  ONE HALF MILE AT TIMES ACROSS MOUNTAIN PASSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$
041 
WWUS45 KTFX 302006
WSWTFX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
206 PM MDT MON MAY 30 2011

MTZ008-015-302115-
/O.CAN.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
BEAVERHEAD-MADISON-
INCLUDING THE FOLLOWING LOCATIONS...BIG HOLE PASS...
CHIEF JOSEPH PASS...MONIDA PASS...RAYNOLDS PASS
206 PM MDT MON MAY 30 2011

...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS CANCELLED THE
WINTER STORM WARNING. 

SCATTERED SNOW SHOWERS WILL CONTINUE THROUGH THE EVENING BUT
ADDITIONAL ACCUMULATIONS ARE NOT EXPECTED.

$$

MTZ012-050-051-054-310415-
/O.CON.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
CASCADE-JUDITH BASIN-FERGUS-MEAGHER-
INCLUDING THE FOLLOWING LOCATIONS...KINGS HILL PASS
206 PM MDT MON MAY 30 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT UNTIL MIDNIGHT MDT TONIGHT. 

* TIMING AND MAIN IMPACT: SNOW WILL CONTINUE TO THROUGH THIS
  AFTERNOON AND DIMINISH THIS EVENING. TRAVELERS SHOULD BE
  PREPARED FOR SNOW COVERED AND SLIPPERY ROADS.

* SNOW ACCUMULATIONS: ADDITIONAL SNOW ACCUMULATIONS OF 4 TO 8
  INCHES ARE EXPECTED. 

* VISIBILITIES: VISIBILITIES MAY BE REDUCED TO LESS THAN ONE HALF
  MILE AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW
ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN
EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$

MTZ055-310415-
/O.CON.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS...BATTLE RIDGE PASS...
BOZEMAN PASS...TARGHEE PASS...WEST YELLOWSTONE
206 PM MDT MON MAY 30 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT UNTIL MIDNIGHT MDT TONIGHT. 

* TIMING AND MAIN IMPACT: SNOW WILL CONTINUE IN THE MOUNTAINS 
  OF SOUTHWEST MONTANA THROUGH THE EVENING HOURS TODAY. EXPECT 
  SNOWFALL RATES UP TO 1 INCH PER HOUR TIMES THIS MORNING. 
  TRAVELERS SHOULD BE PREPARED FOR SNOW COVERED AND SLIPPERY 
  ROADS ACROSS MOUNTAIN PASSES...ALONG WITH REDUCED VISIBILITY 
  IN HEAVY WET SNOW. 

* SNOW ACCUMULATIONS: TOTAL SNOW ACCUMULATIONS OF 10 TO 15 
  INCHES ARE EXPECTED ABOVE 5500 FEET. 

* VISIBILITIES: EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN 
  ONE HALF MILE AT TIMES ACROSS MOUNTAIN PASSES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$
820 
WWUS45 KTFX 302016 CCA
WSWTFX

URGENT - WINTER WEATHER MESSAGE...CORRECTED
NATIONAL WEATHER SERVICE GREAT FALLS MT
215 PM MDT MON MAY 30 2011

MTZ008-015-302115-
/O.CAN.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
BEAVERHEAD-MADISON-
INCLUDING THE FOLLOWING LOCATIONS...BIG HOLE PASS...
CHIEF JOSEPH PASS...MONIDA PASS...RAYNOLDS PASS
215 PM MDT MON MAY 30 2011

...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS CANCELLED THE
WINTER STORM WARNING. 

SCATTERED SNOW SHOWERS WILL CONTINUE THROUGH THE EVENING BUT
ADDITIONAL ACCUMULATIONS ARE NOT EXPECTED.

$$

MTZ012-050-051-054-310430-
/O.CON.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
CASCADE-JUDITH BASIN-FERGUS-MEAGHER-
INCLUDING THE FOLLOWING LOCATIONS...KINGS HILL PASS
215 PM MDT MON MAY 30 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT UNTIL MIDNIGHT MDT TONIGHT. 

* TIMING AND MAIN IMPACT: SNOW WILL CONTINUE TO THROUGH THIS
  AFTERNOON AND DIMINISH THIS EVENING. TRAVELERS SHOULD BE
  PREPARED FOR SNOW COVERED AND SLIPPERY ROADS.

* SNOW ACCUMULATIONS: ADDITIONAL SNOW ACCUMULATIONS OF 4 TO 8
  INCHES ARE EXPECTED. 

* VISIBILITIES: VISIBILITIES MAY BE REDUCED TO LESS THAN ONE HALF
  MILE AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW
ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN
EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$

MTZ055-310430-
/O.COR.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS...BATTLE RIDGE PASS...
BOZEMAN PASS...TARGHEE PASS...WEST YELLOWSTONE
215 PM MDT MON MAY 30 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT UNTIL MIDNIGHT MDT TONIGHT. 

* TIMING AND MAIN IMPACT: SNOW WILL CONTINUE TO THROUGH THIS
  AFTERNOON AND DIMINISH THIS EVENING. TRAVELERS SHOULD BE
  PREPARED FOR SNOW COVERED AND SLIPPERY ROADS.

* SNOW ACCUMULATIONS: ADDITIONAL SNOW ACCUMULATIONS OF 4 TO 8
  INCHES ARE EXPECTED. 

* VISIBILITIES: VISIBILITIES MAY BE REDUCED TO LESS THAN ONE HALF
  MILE AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$
847 
WWUS45 KTFX 310224
WSWTFX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
824 PM MDT MON MAY 30 2011

MTZ012-050-051-054-310600-
/O.CON.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
CASCADE-JUDITH BASIN-FERGUS-MEAGHER-
INCLUDING THE FOLLOWING LOCATIONS...KINGS HILL PASS
824 PM MDT MON MAY 30 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT UNTIL MIDNIGHT MDT TONIGHT. 

* TIMING AND MAIN IMPACT: SNOW WILL CONTINUE TO THROUGH THIS
  EVENING. TRAVELERS SHOULD BE PREPARED FOR SNOW COVERED AND
  SLIPPERY ROADS.

* SNOW ACCUMULATIONS: ADDITIONAL SNOW ACCUMULATIONS OF 2 TO 4
  INCHES ARE EXPECTED.

* VISIBILITIES: VISIBILITIES MAY BE REDUCED TO LESS THAN ONE 
  HALF MILE AT TIMES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW
ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN
EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$

MTZ055-310600-
/O.CON.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS...BATTLE RIDGE PASS...
BOZEMAN PASS...TARGHEE PASS...WEST YELLOWSTONE
824 PM MDT MON MAY 30 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT FOR ELEVATIONS ABOVE 5500 FEET...

A WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET REMAINS IN
EFFECT UNTIL MIDNIGHT MDT TONIGHT. 

* TIMING AND MAIN IMPACT: SNOW WILL CONTINUE TO THROUGH THIS
  EVENING. TRAVELERS SHOULD BE PREPARED FOR SNOW COVERED AND
  SLIPPERY ROADS.

* SNOW ACCUMULATIONS: ADDITIONAL SNOW ACCUMULATIONS OF 2 TO 4
  INCHES ARE EXPECTED.

* VISIBILITIES: VISIBILITIES MAY BE REDUCED TO LESS THAN ONE 
  HALF MILE AT TIMES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST...KEEP AN EXTRA FLASHLIGHT...FOOD...AND
WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

FOR SPECIFIC ROAD AND TRAVEL CONDITIONS IN MONTANA...DIAL 5 1 1.

&&

$$
867 
WWUS45 KTFX 310540
WSWTFX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE GREAT FALLS MT
1140 PM MDT MON MAY 30 2011

MTZ012-050-051-054-055-310645-
/O.EXP.KTFX.WS.W.0024.000000T0000Z-110531T0600Z/
CASCADE-JUDITH BASIN-FERGUS-MEAGHER-GALLATIN-
INCLUDING THE FOLLOWING LOCATIONS...KINGS HILL PASS...
BATTLE RIDGE PASS...BOZEMAN PASS...TARGHEE PASS...
WEST YELLOWSTONE
1140 PM MDT MON MAY 30 2011

...WINTER STORM WARNING WILL EXPIRE AT MIDNIGHT MDT TONIGHT FOR
ELEVATIONS ABOVE 5500 FEET...

THE WINTER STORM WARNING FOR ELEVATIONS ABOVE 5500 FEET WILL
EXPIRE AT MIDNIGHT MDT TONIGHT. 

SCATTERED AREAS OF LIGHT SNOW CAN BE EXPECTED TONIGHT OVER THE
LITTLE BELT MOUNTAINS...ALONG WITH THE MOUNTAINS ACROSS GALLATIN
COUNTY. HOWEVER...SIGNIFICANT SNOW IS NO LONGER EXPECTED AND THE
WINTER STORM WARNING WILL BE ALLOWED TO EXPIRE AT MIDNIGHT.

$$

What forecasters said that day

The local office's own words before this winter storm 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 winter storm warning went out at May 28, 10:35 PM MDT, 5 hours 49 minutes earlier.

Area forecast discussion, May 28, 10:35 PM MDT, 5 hours 49 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
1035 PM MDT SAT MAY 28 2011

.UPDATE...
SATELLITE IMAGERY THIS EVENING SHOWS THE NEXT UPPER LEVEL LOW TO
BRING SIGNIFICANT MOISTURE TO THE REGION TOMORROW NIGHT AND MONDAY
NOW MOVING INTO THE GREAT BASIN FROM OR/NRN CA WITH CONVERGING FLOW
OVER MUCH OF MT BETWEEN THIS SYSTEM AND NORTHERLY FLOW AROUND THE
BACK SIDE OF THE SYSTEM LIFTING NE THROUGH CENTRAL CANADA. SHOWERS
AND THUNDERSTORMS DEVELOPED ALONG A WEAK BOUNDARY THAT WAS ALONG
THE CANADIAN BORDER THIS AFTERNOON WITH SOME REMNANTS FROM THE
EARLY CONVECTION DRIFTING SOUTH AND DIMINISHING THROUGH THE
REMAINDER OF THIS EVENING. BEST CHANCE FOR LINGERING PRECIPITATION
THIS EVENING WILL BE IN THE GLACIER COUNTY/NORTHERN ROCKY MTN
FRONT REGION WHERE MOISTURE FROM THE EARLIER SHOWER ACTIVITY WILL
CONTINUE TO BE LIFTED ALONG THE MTNS IN NE FLOW ALOFT. MOISTURE IN
ADVANCE THE INCOMING SYSTEM WILL LIKELY MOVE INTO FAR SW ZONES LATER
TONIGHT. HOENISCH

&&

.AVIATION...
UPDATED 0435Z.
EXPECT SCATTERED SHOWERS TO LINGER THROUGH THE NIGHT ESPECIALLY
TOWARDS THE ROCKY MOUNTAIN FRONT. EXPECT LOCAL MVFR
CEILINGS/VISIBILITIES IN THE SHOWERS. OTHERWISE EXPECT GENERALLY VFR
CONDITIONS OVERNIGHT. AN EXCEPTION TO THIS COULD BE OVER THE PLAINS
WHERE THERE IS A THREAT OF IFR CEILINGS AND POSSIBLY VISIBILITIES IN
FOG LATE TONIGHT INTO EARLY SUNDAY MORNING. ON SUNDAY MOISTURE FROM
A WEATHER SYSTEM WILL SPREAD INTO SOUTHWEST MONTANA DURING THE
MORNING AND THEN SPREAD TO CENTRAL MONTANA DURING THE AFTERNOON AND
EVENING. ALSO NOTE THAT MOUNTAINS ABOVE 7000 FEET SHOULD BECOME
OBSCURED IN SNOW. EXPECT FAIRLY WIDESPREAD SHOWERS AS THE MOISTURE
SPREADS NORTH. WITH THIS MOISTURE EXPECT AT LEAST LOCAL MVFR
CEILINGS/VISIBILITIES IN PRECIPITATION. THE MVFR
CEILINGS/VISIBILITIES COULD BECOME MORE WIDESPREAD SUNDAY NIGHT. IN
THE FAR NORTH EXPECT AT LEAST SCATTERED SHOWERS WITH LOCAL MVFR
CEILINGS AND VISIBILITIES SUNDAY INTO SUNDAY NIGHT. THERE WILL BE A
THREAT OF THUNDERSTORMS SUNDAY AFTERNOON AND EVENING...MAINLY IN THE
NORTH. DECIDED TO MENTION THIS IN THE KCTB/KHVR TAFS. FINALLY MODELS
SUGGEST NORTHEAST WINDS SUNDAY SO HAD A HARD TIME FORECASTING WIND
DIRECTIONS AT KLWT/KGTF/KHLN/KBZN WHERE WINDS TEND TO BE EITHER OUT
OF THE NORTH OR OUT OF THE EAST. BLANK

&&

.HYDROLOGY...
SCATTERED TO NUMEROUS SHOWERS ARE EXPECTED THROUGH EARLY SUNDAY.
AT THIS TIME IT APPEARS THAT ADDITIONAL RAINFALL AMOUNTS DURING
THIS TIME PERIOD WILL NOT BE EXCESSIVE. HOWEVER...ANOTHER LARGER
STORM SYSTEM WILL MOVE INTO SOUTHWEST AND CENTRAL MONTANA SUNDAY
NIGHT WITH WIDESPREAD RAIN EXPECTED THROUGH MONDAY. THE HEAVIEST
RAINFALL IS EXPECTED TO FALL EAST OF A LINE FROM HAVRE TO GREAT
FALLS TO HELENA TO DILLON. RAINFALL TOTALS FROM SUNDAY MORNING
THROUGH MONDAY WILL GENERALLY RANGE FROM 0.50 INCHES NEAR GREAT
FALLS...TO 1 TO 2 INCHES FARTHER EAST IN THE JUDITH BASIN AND
LEWISTOWN AREA. THIS WILL KEEP WATER LEVELS ON AREA
RIVERS...STREAMS...AND CREEKS HIGH OR OVERFLOWING THEIR BANKS.
FLOODING OF MANY AREA WATERWAYS IS EXPECTED TO CONTINUE THROUGH NEXT
WEEK AS TEMPERATURES WARM ACCELERATING THE MELTING OF HIGHER
ELEVATION SNOWPACK.

&&

.PREV DISCUSSION...
/ISSUED 600 PM MDT SAT MAY 28 2011/
FXUS65 KTFX 282346
AFDTFX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
600 PM MDT SAT MAY 28 2011

TONIGHT THROUGH MONDAY...A DEEP LOW PRESSURE SYSTEM OVER THE WEST
COAST WILL MOVE EAST OVER NEVADA BY SUNDAY MORNING. THIS WILL BRING
A LARGE INCREASE IN MOISTURE AND WIDESPREAD PRECIPITATION INTO
SOUTHWEST MONTANA. FLOW AHEAD OF THIS SYSTEM WILL BE QUITE DIFFLUENT
OVER SOUTHWEST MONTANA BY EARLY SUNDAY MORNING...AND THIS DIFFLUENCE
WILL SPREAD TO THE NORTH DURING THE DAY. DYNAMICS ARE NOT
PARTICULARLY STRONG...MOST LIFT IS ASSOCIATED WITH THE APPROACHING
LOW PRESSURE CENTER...AND ONLY LOCALLY HEAVY PRECIP IS EXPECTED.
HOWEVER...THE PRECIPITATION WILL BE WIDESPREAD AND OF LONG DURATION.
A WINTER STORM WATCH HAS BEEN ISSUED FOR SOUTHWEST MONTANA FOR
ELEVATIONS ABOVE 6000 FEET BEGINNING SUNDAY MORNING. A WATCH OVER
MEAGHER AND JUDITH BASIN HAS BEEN ISSUED BEGINNING SUNDAY EVENING.
ZELZER

MONDAY NIGHT THROUGH SATURDAY...EXTENDED RANGE PERIOD BEGINS WITH
UPPER LEVEL TROF CENTERED IN THE NORTHEAST CORNER OF MT AND
CONTINUING TO EXIT TO THE EAST. SCATTERED SHOWERS ON THE BACKSIDE
OF THE SYSTEM WILL GRADUALLY DISSIPATE FROM WEST TO EAST ACROSS
NORTH CENTRAL AND CENTRAL MONTANA LATE MON NIGHT. FORECAST MODELS
STILL IN VERY GOOD AGREEMENT THAT A STRONG UPPER LEVEL RIDGE WILL
THEN SETTLE OVER THE REGION FOR THE REMAINDER OF THE
WEEK...BRINGING DRY CONDITIONS AND MUCH WARMER TEMPERATURES.
MEANWHILE A FAIRLY DEEP CLOSED LOW/UPPER LEVEL TROF DIGS SOUTH
ALONG THE PACNW COAST AND REMAINS NEARLY STATIONARY NEAR THE OR/CA
BORDER THROUGH AT LEAST THURSDAY. THE SYSTEM WILL PUSH
INTERMITTENT PLUMES OF PACIFIC MOISTURE NORTHWARD INTO WESTERN
MT...GIVING A CHANCE OF SHOWERS/THUNDERSTORMS ALONG THE ROCKY MTN
FRONT EACH AFTN/EVE THROUGH FRIDAY...WHILE THE REST OF THE
FORECAST AREA REMAINS DRY. THE GFS AND EUROPEAN MODEL SOLUTIONS
BEGIN TO DIVERGE LATE FRI INTO SAT. BOTH MODELS SHOW A GRADUAL
WEAKENING OF THE HIGH PRESSURE RIDGE...BUT THE EUROPEAN BRINGS THE
PACIFIC LOW ASHORE TO THE CA/NV BORDER AND SETS UP A BROAD TROF
ACROSS THE NORTHERN ROCKIES AND SRN CANADA. THE GFS KEEPS THE LOW
CENTERED OFF THE CENTRAL CALIFORNIA COAST AND MAINTAINS THE UPPER
LEVEL RIDGE THROUGH NEXT WEEKEND. FOR NOW...FORECAST GRIDS LEAN
TOWARD THE GFS SOLUTION. THE BEST NEWS IS THAT WITH EITHER
MODEL...THE REGION WILL SEE A PRONOUNCED WARM-UP DURING THE LATTER
HALF OF THE WEEK WITH MID-UPPER 70S EXPECTED OVER THE
PLAINS/VALLEYS AND MID-UPPER 60S FOR THE MOUNTAINS. WARANAUSKAS

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  38  54  40  49 /  50  50  90  90
CTB  36  56  38  53 /  80  40  80  80
HLN  38  55  41  51 /  30  70 100  90
BZN  34  50  37  49 /  40  90  90  90
WEY  28  41  29  42 /  60 100  90  80
DLN  34  47  35  50 /  50  80  80  80
HVR  39  62  44  55 /  50  30  80  90
LWT  35  49  38  44 /  30  60 100 100

&&

.TFX WATCHES/WARNINGS/ADVISORIES...
FLOOD WATCH THROUGH TUESDAY AFTERNOON BEAVERHEAD...BROADWATER...
CENTRAL AND SOUTHERN LEWIS AND CLARK...EASTERN GLACIER...EASTERN
PONDERA...EASTERN TETON...GALLATIN...HILL...JEFFERSON...
LIBERTY...MADISON...NORTHERN ROCKY MOUNTAIN FRONT...SOUTHERN
ROCKY MOUNTAIN FRONT...TOOLE.

SMALL STREAM FLOOD ADVISORY UNTIL SUNDAY MORNING FOR PORTIONS OF
GLACIER AND HILL COUNTIES.

AREAL FLOOD WARNING THROUGH AT LEAST MONDAY MORNING FOR
CASCADE...FERGUS...JUDITH BASIN...CHOUTEAU...BLAINE AND MEAGHER
COUNTIES

WINTER STORM WATCH FROM SUNDAY EVENING THROUGH MONDAY EVENING
FOR ELEVATIONS ABOVE 6000 FEET FOR JUDITH BASIN...MEAGHER.

WINTER STORM WATCH FROM 6 AM MDT SUNDAY THROUGH MONDAY EVENING
FOR ELEVATIONS ABOVE 6000 FEET FOR BEAVERHEAD...GALLATIN...
MADISON.

&&

WEATHER.GOV/GREATFALLS
Hazardous weather outlook, May 29, 4:15 AM MDT, 9 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREAT FALLS MT
415 AM MDT SUN MAY 29 2011

MTZ008-012-015-050-051-054-055-301200-
BEAVERHEAD-CASCADE-MADISON-JUDITH BASIN-FERGUS-MEAGHER-GALLATIN-
415 AM MDT SUN MAY 29 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL MONTANA
AND SOUTHWEST MONTANA.

.DAY ONE...TODAY AND TONIGHT

WINTER STORM WARNINGS ARE IN EFFECT ABOVE 5500 FEET.

NUMEROUS FLOOD HIGHLIGHTS REMAIN IN EFFECT ACROSS THE REGION.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

A WINTER STORM WARNING REMAINS IN EFFECT THROUGH MONDAY EVENING
FOR LOCATIONS ABOVE 5500 FEET.

NUMEROUS FLOOD HIGHLIGHTS REMAIN IN EFFECT UNTIL THE THREAT FOR
FLOODING HAS ENDED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER REPORTS OF FLOODING...SNOWFALL OR SIGNIFICANT RESTRICTIONS
TO VISIBILITY WOULD BE GREATLY APPRECIATED.

MTZ009>011-013-014-044>049-052-053-301200-
NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-HILL-CHOUTEAU-
CENTRAL AND SOUTHERN LEWIS AND CLARK-TOOLE-LIBERTY-
EASTERN PONDERA-BLAINE-SOUTHERN ROCKY MOUNTAIN FRONT-
EASTERN TETON-JEFFERSON-BROADWATER-
415 AM MDT SUN MAY 29 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
MONTANA AND SOUTHWEST MONTANA.

.DAY ONE...TODAY AND TONIGHT

NUMEROUS FLOOD HIGHLIGHTS REMAIN IN EFFECT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

WIDESPREAD RAIN AND MOUNTAIN SNOW IS EXPECTED TO AFFECT THE
REGION FROM TONIGHT THROUGH MONDAY MORNING. THOSE WHO HAVE
OUTDOOR ACTIVITIES PLANNED FOR SHOULD BE PREPARED FOR RAINY
WEATHER AT LOWER ELEVATIONS...AND SNOW IF THEY PLAN TO BE IN THE
MOUNTAINS OVER THE NEXT FEW DAYS.

NUMEROUS FLOOD HIGHLIGHTS WILL REMAIN IN EFFECT UNTIL THE THREAT
FOR FLOODING HAS ENDED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER REPORTS OF FLOODING...SNOWFALL OR SIGNIFICANT RESTRICTIONS
TO VISIBILITY WOULD BE GREATLY APPRECIATED.

Nearby

Winter Storm Warnings in Montana, 2011Every winter storm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.