Alert archive / Montana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 6, NWS Great Falls, MT

June 4, 20124 counties in Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 4, 2012, 6:59 PM MDT for 4 counties in Montana. It was in force for 61 min. 13 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 4, 2012, 6:59 PM MDT (00:59 UTC)
Expired: Jun 4, 2012, 8:00 PM MDT
In force: 61 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon

Counties Cascade County, MT, Chouteau County, MT, Pondera County, MT, Teton County, MT

The radar

The Great Falls radar (KTFX), 44 km from the middle of the area, began a volume at 01:01 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jun 4, 7:01 PM MDT	HAIL 1.75	5 Se Power, MT	GOLF BALL SIZE HAIL A FEW MILES SOUTHEAST OF POWER.
Jun 4, 7:08 PM MDT	HAIL 1	Power, MT	ESTIMATED 1 INCH HAIL NEAR POWER
Jun 4, 7:15 PM MDT	TSTM WND DMG	Black Eagle, MT	DAMAGE TO SMALL BUILDINGS AND FENCES AT LOCAL RACE TRACK...LOOSE EQUIPMENT DISPLACED 200 FEET
Jun 4, 7:15 PM MDT	HAIL 0.25	Dutton, MT	PEA SIZE HAIL IN DUTTON.
Jun 4, 7:17 PM MDT	HAIL 1	Sun Prairie, MT	ESTIMATED 1 INCH HAIL IN SUN PRAIRIE
Jun 4, 7:28 PM MDT	TSTM WND GST 70	5 Ne Carter, MT	ESTIMATED 2.5 INCH HAIL....70 MPH WIND...AND DEBRIS ALONG HWY 87. VEHICLE WINDOWSHIELDS BLOWN OUT
Jun 4, 7:28 PM MDT	HAIL 2.5	5 Ne Carter, MT	ESTIMATED 2.5 INCH HAIL....70 MPH WIND...AND DEBRIS ALONG HWY 87. VEHICLE WINDOWSHIELDS BLOWN OUT
Jun 4, 7:30 PM MDT	HAIL 0.7	6 Se Power, MT
Jun 4, 7:35 PM MDT	TSTM WND GST 65	1 S Carter, MT
Jun 4, 7:35 PM MDT	HAIL 2	1 S Carter, MT
Jun 4, 7:35 PM MDT	HAIL 2.75	2 W Floweree, MT	DAMAGE TO POLICE VEHICLES
Jun 4, 7:40 PM MDT	TSTM WND GST 55	5 W Fort Benton, MT	WINDOW DAMAGE ON HOUSES
Jun 4, 7:40 PM MDT	HAIL 1.75	5 W Fort Benton, MT	WINDOW DAMAGE ON HOUSES

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 10 storm reports to this severe thunderstorm warning; the first came 2 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 4, 4:32 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 4, 6:02 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 1.0 hours before the alert went out and 79 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2217 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 182 m²/s²
0-3 km storm-relative helicity: 469 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

025 
WUUS55 KTFX 050059
SVRTFX
MTC013-015-073-099-050200-
/O.NEW.KTFX.SV.W.0006.120605T0059Z-120605T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
659 PM MDT MON JUN 4 2012

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CASCADE COUNTY IN CENTRAL MONTANA...
  WESTERN CHOUTEAU COUNTY IN NORTH CENTRAL MONTANA...
  SOUTHEASTERN PONDERA COUNTY IN NORTH CENTRAL MONTANA...
  SOUTHEASTERN TETON COUNTY IN NORTH CENTRAL MONTANA...

* UNTIL 800 PM MDT

* AT 656 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES SOUTHEAST OF POWER...MOVING NORTHEAST
  AT 45 MPH.

* LOCATIONS IN THE WARNING INCLUDE BLACK EAGLE...CASCADE...DUTTON...
  FAIRFIELD...FORT BENTON...FORT SHAW...GREAT FALLS...POWER AND THE
  KNEES.

HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 60 MPH ARE LIKELY WITH
THIS STORM.

DAMAGING WINDS UP TO 60 MPH HAVE BEEN REPORTED WITH THIS STORM. THIS 
IS A DANGEROUS STORM...SEEK SAFE SHELTER AND STAY AWAY FROM WINDOWS.

HAIL UP TO ONE INCH IN DIAMETER HAS BEEN REPORTED IN MANCHESTER WITH 
THIS STORM. IF YOU ARE IN THE PATH OF THIS STORM...TAKE IMMEDIATE 
ACTION TO PROTECT LIFE AND PROPERTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE 
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD 
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A 
SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM MDT TUESDAY MORNING
FOR NORTHWESTERN MONTANA.

&&

LAT...LON 4813 11140 4813 11083 4819 11082 4798 11037
      4723 11167 4743 11205 4751 11205 4751 11211
      4752 11214 4822 11157 4822 11141
TIME...MOT...LOC 0058Z 215DEG 49KT 4767 11149

$$

MLV

4 follow-up statements

753 
WWUS55 KTFX 050114
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
714 PM MDT MON JUN 4 2012

MTC013-015-073-099-050200-
/O.CON.KTFX.SV.W.0006.000000T0000Z-120605T0200Z/
CASCADE MT-CHOUTEAU MT-TETON MT-PONDERA MT-
714 PM MDT MON JUN 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MDT
FOR SOUTHEASTERN PONDERA...SOUTHEASTERN TETON...WESTERN CHOUTEAU AND
NORTH CENTRAL CASCADE COUNTIES...

AT 710 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 15 MILES SOUTH OF THE KNEES...OR 21 MILES NORTH OF GREAT
FALLS...MOVING NORTHEAST AT 50 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CARTER...FORT BENTON AND LOMA

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE 
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY 
AWAY FROM WINDOWS!

GOLF-BALL SIZED HAIL HAS BEEN REPORTED NEAR POWER WITH THIS STORM. 
IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION TO 
PROTECT LIFE AND PROPERTY.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM MDT TUESDAY MORNING
FOR NORTHWESTERN MONTANA.

LAT...LON 4813 11140 4813 11083 4819 11082 4798 11037
      4736 11145 4762 11206 4822 11157 4822 11141
TIME...MOT...LOC 0114Z 215DEG 49KT 4785 11130

$$

MLV

686 
WWUS55 KTFX 050131
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
731 PM MDT MON JUN 4 2012

MTC013-015-073-099-050200-
/O.CON.KTFX.SV.W.0006.000000T0000Z-120605T0200Z/
CASCADE MT-CHOUTEAU MT-TETON MT-PONDERA MT-
731 PM MDT MON JUN 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MDT
FOR SOUTHEASTERN PONDERA...EAST CENTRAL TETON...WESTERN CHOUTEAU AND
NORTH CENTRAL CASCADE COUNTIES...

AT 728 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES EAST OF
THE KNEES...OR 25 MILES NORTHWEST OF FORT BENTON...MOVING NORTHEAST
AT 50 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LOMA 
AND FORT BENTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM MDT TUESDAY MORNING
FOR NORTHWESTERN MONTANA.

LAT...LON 4813 11140 4813 11083 4819 11082 4798 11037
      4745 11130 4776 11195 4822 11157 4822 11141
TIME...MOT...LOC 0131Z 215DEG 49KT 4804 11110

$$

MLV

711 
WWUS55 KTFX 050148
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
748 PM MDT MON JUN 4 2012

MTC013-099-050157-
/O.CAN.KTFX.SV.W.0006.000000T0000Z-120605T0200Z/
CASCADE MT-TETON MT-
748 PM MDT MON JUN 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL TETON AND NORTH
CENTRAL CASCADE COUNTIES IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM MDT TUESDAY MORNING
FOR NORTHWESTERN MONTANA.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 100 AM MDT
TUESDAY MORNING FOR SOUTHWEST MONTANA.

LAT...LON 4813 11140 4813 11083 4819 11082 4798 11037
      4771 11112 4771 11133 4783 11141 4796 11139
      4799 11141 4801 11167 4822 11157 4822 11141
TIME...MOT...LOC 0147Z 215DEG 49KT 4822 11091

$$

MTC015-073-050200-
/O.CON.KTFX.SV.W.0006.000000T0000Z-120605T0200Z/
CHOUTEAU MT-PONDERA MT-
748 PM MDT MON JUN 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MDT
FOR SOUTHEASTERN PONDERA AND WEST CENTRAL CHOUTEAU COUNTIES...

AT 742 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING 
WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 24 MILES SOUTH OF 
CHESTER...MOVING NORTHEAST AT 40 MPH.

THIS STORM HAS PRODUCED HAIL IN OVER 2 INCHES IN DIAMETER IN THE 
CARTER AREA. CAR WINDSHIELDS HAVE BEEN DAMAGED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

&&

LAT...LON 4813 11140 4813 11083 4819 11082 4798 11037
      4771 11112 4771 11133 4783 11141 4796 11139
      4799 11141 4801 11167 4822 11157 4822 11141
TIME...MOT...LOC 0147Z 215DEG 49KT 4822 11091

$$

818 
WWUS55 KTFX 050154
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
754 PM MDT MON JUN 4 2012

MTC015-073-050204-
/O.EXP.KTFX.SV.W.0006.000000T0000Z-120605T0200Z/
CHOUTEAU MT-PONDERA MT-
754 PM MDT MON JUN 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PONDERA AND WEST
CENTRAL CHOUTEAU COUNTIES WILL EXPIRE AT 800 PM MDT...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE SEVERE THUNDERSTORM
THAT PROMPTED THE WARNING HAS EXPIRED...HOWEVER THIS STORM REMAINS
SEVERE AND A NEW THUNDERSTORM WARNING IS NOW IN EFFECT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM MDT TUESDAY MORNING
FOR NORTHWESTERN MONTANA.

LAT...LON 4813 11140 4813 11083 4819 11082 4798 11037
      4771 11112 4771 11133 4783 11141 4796 11139
      4799 11141 4801 11167 4822 11157 4822 11141
TIME...MOT...LOC 0154Z 215DEG 49KT 4830 11082

$$

MLV

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 4, 6:17 PM MDT, 42 minutes earlier.

Area forecast discussion, Jun 4, 6:17 PM MDT, 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
617 PM MDT MON JUN 4 2012

.UPDATE...
HAVE UPGRADED THE SEVERE THUNDERSTORM WATCH FOR A PORTION OF THE
AREA TO A TORNADO WATCH.

&&

.AVIATION...
UPDATED 0015Z.
AN AREA OF SHOWERS AND THUNDERSTORMS WILL AFFECT THE NORTHWEST
PORTION OF THE FORECAST AREA THIS EVENING AND SPECIFICALLY KCTB.
WITHIN THIS AREA THERE WILL BE A RISK OF SEVERE THUNDERSTORMS WITH
WINDS GUSTS TO 50 KNOTS AND HAIL TO ONE INCH IN DIAMETER. WITHIN
THIS AREA THERE WILL ALSO BE A THREAT OF IFR CONDITIONS IN BRIEF
HEAVY RAIN. ELSEWHERE OVER THE FORECAST AREA EXPECT ISOLATED
THUNDERSTORMS THIS EVENING AND AGAIN THERE WILL BE A RISK OF
SEVERE THUNDERSTORMS. SKIES SHOULD BECOME CLEAR OR NEARLY CLEAR
OVER THE FORECAST AREA AFTER MIDNIGHT BUT THEN ANOTHER ROUND OF
SHOWERS AND THUNDERSTORMS WILL DEVELOP TUESDAY AFTERNOON. SOME OF
THESE STORMS COULD AGAIN BE SEVERE WITH A RISK OF STRONG WINDS AND
LARGE HAIL. CONFIDENCE WITH FORECAST WINDS IS BELOW AVERAGE. BLANK

&&

.HYDROLOGY...
THE FLOOD WARNING CONTINUES FOR CLEAR CREEK IN BLAINE COUNTY
UNTIL FURTHER NOTICE. CLEAR CREEK IS EXPECTED TO REMAIN ABOVE
FLOOD STAGE FOR AT LEAST ANOTHER 24 HOURS.

&&

.PREV DISCUSSION...
/ISSUED 444 PM MDT MON JUN 4 2012/
FXUS65 KTFX 042244
AFDTFX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
444 PM MDT MON JUN 4 2012

UPDATE...
HAVE UPDATED TO ISSUE A SEVERE THUNDERSTORM WATCH THROUGH 1 AM MDT
FOR THE ENTIRE FORECAST AREA. THERE IS AN AREA OF STRONG
THUNDERSTORMS WEST OF THE CONTINENTAL DIVIDE WHICH WILL AFFECT THE
NORTHWEST PORTIONS OF THE FORECAST AREA THIS EVENING. THERE MIGHT
ALSO BE A FEW STRONG THUNDERSTORMS ELSEWHERE IN THE FORECAST AREA
THIS EVENING. BLANK

&&

.PREV DISCUSSION...
/ISSUED 228 PM MDT MON JUN 4 2012/

TONIGHT THROUGH WEDNESDAY...A VERY ACTIVE WEATHER PATTERN WILL BE
IN PLACE DURING THE EARLY PORTION OF THE SHORT TERM PERIOD. A DEEP
AND STRONG UPPER LEVEL TROUGH OVER THE EASTERN PACIFIC IS MOVING
INLAND AND WILL MOVE TO THE NORTHERN ROCKIES BY TUESDAY EVENING.
AHEAD OF THIS UPPER LEVEL FEATURE AN UNSTABLE FLOW ALOFT WILL
ADVECT OVER MY FORECAST AREA THIS AFTERNOON AND EVENING WITH
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS. LOW TO MID LEVEL
SHEAR PROFILES CONTINUE TO SUGGEST THAT ROTATING STORMS ARE A GOOD
BET WITH A DISTINCT CHANCE THAT SEVERAL STORMS COULD REACH SEVERE
LIMITS. MOST LIKELY SCENARIO FOR SEVERE WEATHER IS EXPECTED TO BE
STRONG AND DAMAGING WINDS WITH A LESSER POSSIBILITY OF LARGE HAIL.
THERE IS ALSO A SLIGHT RISK THAT A TORNADO COULD FORM AT SOME
POINT DURING THE EARLY EVENING HOURS...MAINLY NORTH AND WEST OF A
KHLN-KGTF-KHVR LINE. THE UPPER TROUGH WILL BRING THE BEST
LIKELIHOOD OF WIDESPREAD PRECIPITATION TO THE FORECAST AREA
TUESDAY EVENING WITH ANOTHER ROUND OF POSSIBLY SEVERE STORMS
EXPECTED DURING THE AFTERNOON AND EVENING HOURS OVER MY CENTRAL
AND EASTERN ZONES. BY WEDNESDAY THE THREAT OF SEVERE WEATHER WILL
HAVE MOVED AWAY FROM THE REGION WITH A MUCH COOLER DAY ON TAP AS
TEMPERATURES FALL INTO THE LOW 60S FOR HIGHS. MPJ

WEDNESDAY THROUGH MONDAY NIGHT...LONG RANGE MODELS ARE IN BETTER
AGREEMENT TONIGHT THROUGH THE PERIOD. THE SHORTWAVE TROUGH IS
STILL FORECAST TO LIFT NORTH OUT OF THE AREA ON WEDNESDAY...WITH
THE BEST CHANCE FOR LINGERING PRECIPITATION OVER THE CONTINENTAL
DIVIDE. THE COLD FRONT ASSOCIATED WITH THIS SHORTWAVE WILL ALSO
LIFT NORTH OUT OF THE AREA ON WEDNESDAY. THE COMBINATION OF STRONG
WESTERLY WINDS ALOFT AND THE STRONG PRESSURE GRADIENT IN THE WAKE
OF THE COLD FRONT WILL BRING STRONG WINDS TO NORTH CENTRAL AND
CENTRAL MONTANA DURING THE DAY ON WEDNESDAY. WINDS MAY APPROACH
HIGH WIND CRITERIA ALONG THE ROCKY MOUNTAIN FRONT...AND THIS
SITUATION WILL CONTINUE TO BE MONITORED. WINDS AND SHOWERS WILL
CONTINUE TO DECREASE WEDNESDAY NIGHT AS THE SYSTEM MOVES FARTHER
AWAY FROM THE AREA. HOWEVER...ANOTHER SHORTWAVE WILL MOVE
NORTHEAST THROUGH MONTANA ON THURSDAY...KEEPING LINGERING SHOWERS
OVER THE WESTERN MOUNTAINS...AS WELL AS OVER THE EASTERN PORTION
OF THE TFX CWA. TEMPERATURES WILL REMAIN UP TO 5 DEGREES BELOW
SEASONAL AVERAGES DURING THIS TIME. A CHANGE FROM THE PREVIOUS
FORECAST IS THAT THE MODELS ARE IN GOOD AGREEMENT WITH BRINGING AN
UPPER LEVEL LOW PRESSURE AREA INTO THE PACIFIC NORTHWEST ON
THURSDAY AND ACROSS MONTANA THROUGH SUNDAY NIGHT. THIS WILL KEEP A
GOOD CHANCE OF SHOWERS AND AFTERNOON/EVENING THUNDERSTORMS OVER
THE AREA THURSDAY NIGHT THROUGH THE END OF THE PERIOD. THE BEST
CHANCE FOR PRECIPITATION WILL LIKELY BE SUNDAY NIGHT AS THE UPPER
LOW MOVES OVER THE AREA AND DRAGS A WEAK CANADIAN COLD FRONT SOUTH
OVER THE AREA. TEMPERATURES WILL INITIALLY WARM UP TO 10 DEGREES
ABOVE NORMAL ON FRIDAY AHEAD OF THIS SYSTEM...BUT TEMPERATURES
OTHERWISE WILL REMAIN UP TO 5 DEGREES BELOW NORMAL. THESE OVERALL
COOLER TEMPERATURES WILL CAUSE RAIN TO MIX WITH OR CHANGE OVER TO
SNOW AT THE HIGHER ELEVATIONS. COULSTON

.PRELIMINARY POINT TEMPS/POPS...
GTF  56  80  44  63 /  40  30  70  20
CTB  52  73  42  57 /  60  30  80  40
HLN  56  78  43  64 /  40  40  60  30
BZN  51  82  39  64 /  30  30  50  20
WEY  43  67  30  52 /  20  50  60  20
DLN  51  73  35  60 /  20  50  60  50
HVR  61  90  51  68 /  40  30  60  20
LWT  57  85  44  65 /  30  20  50  10

&&

.TFX WATCHES/WARNINGS/ADVISORIES...
TORNADO WATCH UNTIL 1 AM MDT TUESDAY BLAINE...CASCADE...CENTRAL
AND SOUTHERN LEWIS AND CLARK...CHOUTEAU...EASTERN GLACIER...
EASTERN PONDERA...EASTERN TETON...FERGUS...HILL...JUDITH BASIN...
LIBERTY...NORTHERN ROCKY MOUNTAIN FRONT...SOUTHERN ROCKY
MOUNTAIN FRONT...TOOLE.

SEVERE THUNDERSTORM WATCH UNTIL 1 AM MDT TUESDAY BEAVERHEAD...
BROADWATER...GALLATIN...JEFFERSON...MADISON...MEAGHER.

&&

SHORT TERM...BLANK
LONG TERM...BRUSDA
AVIATION...BLANK

WEATHER.GOV/GREATFALLS

Hazardous weather outlook, Jun 4, 4:32 AM MDT, 14 hours 27 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREAT FALLS MT
432 AM MDT MON JUN 4 2012

MTZ047-051045-
BLAINE-
432 AM MDT MON JUN 4 2012

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

.DAY ONE...TODAY AND TONIGHT

A FLOOD WARNING REMAINS IN EFFECT FOR PORTIONS OF CLEAR CREEK
UNTIL FURTHER NOTICE.

SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER SOUTHWEST MONTANA
LATE THIS MORNING AND EARLY THIS AFTERNOON...AND OVER CENTRAL AND
NORTH CENTRAL MONTANA THIS AFTERNOON AND EVENING. SOME STORMS
ARE EXPECTED TO BE SEVERE THIS AFTERNOON AND EVENING...MAINLY NORTH
OF A LINE FROM DILLON TO BOZEMAN. THE MAIN THREAT FROM THESE
SEVERE STORMS IS LARGE HAIL AND DAMAGING WIND GUSTS. THERE IS A
SLIGHT RISK OF TORNADO DEVELOPMENT WITH THE STRONGER
THUNDERSTORMS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS WILL AFFECT NORTH
CENTRAL AND SOUTHWEST MONTANA TUESDAY AS A COLD FRONT MOVES
THROUGH THE AREA. THERE IS THE POTENTIAL FOR SEVERE THUNDERSTORMS
ON TUESDAY AFTERNOON...MAINLY NORTH OF A LINE FROM HELENA TO
LEWISTOWN ALONG AND AHEAD OF THE COLD FRONT. THE MAIN THREAT FROM
ANY SEVERE THUNDERSTORMS ON TUESDAY WILL BE LARGE HAIL AND
DAMAGING WINDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AT TIMES MONDAY AND TUESDAY. ANY
WEATHER SPOTTER REPORTS OF WIND GUSTS OVER 50 MPH...ANY SIZE HAIL
OR FLASH FLOODING WOULD BE GREATLY APPRECIATED.

MTZ008>015-044>046-048>055-051045-
BEAVERHEAD-NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-HILL-
CASCADE-CHOUTEAU-CENTRAL AND SOUTHERN LEWIS AND CLARK-MADISON-
TOOLE-LIBERTY-EASTERN PONDERA-SOUTHERN ROCKY MOUNTAIN FRONT-
EASTERN TETON-JUDITH BASIN-FERGUS-JEFFERSON-BROADWATER-MEAGHER-
GALLATIN-
432 AM MDT MON JUN 4 2012

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

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER SOUTHWEST MONTANA
LATE THIS MORNING AND EARLY THIS AFTERNOON...AND OVER CENTRAL AND
NORTH CENTRAL MONTANA THIS AFTERNOON AND EVENING. SOME STORMS
ARE EXPECTED TO BE SEVERE THIS AFTERNOON AND EVENING...MAINLY NORTH
OF A LINE FROM DILLON TO BOZEMAN. THE MAIN THREAT FROM THESE
SEVERE STORMS IS LARGE HAIL AND DAMAGING WIND GUSTS. THERE IS A
SLIGHT RISK OF TORNADO DEVELOPMENT WITH THE STRONGER
THUNDERSTORMS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS WILL AFFECT NORTH
CENTRAL AND SOUTHWEST MONTANA TUESDAY AS A COLD FRONT MOVES
THROUGH THE AREA. THERE IS THE POTENTIAL FOR SEVERE THUNDERSTORMS
ON TUESDAY AFTERNOON...MAINLY NORTH OF A LINE FROM HELENA TO
LEWISTOWN ALONG AND AHEAD OF THE COLD FRONT. THE MAIN THREAT FROM
ANY SEVERE THUNDERSTORMS ON TUESDAY WILL BE LARGE HAIL AND
DAMAGING WINDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AT TIMES MONDAY AND TUESDAY. ANY
WEATHER SPOTTER REPORTS OF WIND GUSTS OVER 50 MPH...ANY SIZE HAIL
OR FLASH FLOODING WOULD BE GREATLY APPRECIATED.

In the hours before

Local storm report, Jun 4, 6:40 PM MDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
640 PM MDT MON JUN 04 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0635 PM     HAIL             3 E FAIRFIELD           47.62N 111.92W
06/04/2012  E0.25 INCH       TETON              MT   TRAINED SPOTTER

            PEA SIZE HAIL 3 E FAIRFIELD

&&

UTTECH

Local storm report, Jun 4, 6:41 PM MDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
641 PM MDT MON JUN 04 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0632 PM     HAIL             FORT  SHAW              47.51N 111.81W
06/04/2012  E0.25 INCH       CASCADE            MT   PUBLIC

            PEA SIZE HAIL NEAR FORT SHAW

&&

UTTECH

Local storm report, Jun 4, 6:43 PM MDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
643 PM MDT MON JUN 04 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0638 PM     HAIL             7 W FAIRFIELD           47.62N 112.13W
06/04/2012  E0.25 INCH       TETON              MT   TRAINED SPOTTER

            PEA SIZE HAIL 7 W FAIRFIELD

&&

UTTECH

Local storm report, Jun 4, 6:51 PM MDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
651 PM MDT MON JUN 04 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0645 PM     HAIL             SUN PRAIRIE             47.54N 111.48W
06/04/2012  E0.25 INCH       CASCADE            MT   TRAINED SPOTTER

            PEA SIZE HAIL IN THE SUN PRAIRIE AREA.

&&

BRUSDA

Local storm report, Jun 4, 6:52 PM MDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
652 PM MDT MON JUN 04 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0646 PM     HAIL             15 NE FAIRFIELD         47.77N 111.75W
06/04/2012  E0.50 INCH       TETON              MT   TRAINED SPOTTER

            MARBLE SIZE HAIL 15 NE FAIRFIELD

&&

UTTECH

Local storm report, Jun 4, 6:56 PM MDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
656 PM MDT MON JUN 04 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0648 PM     HAIL             1 S VAUGHN              47.55N 111.55W
06/04/2012  E1.00 INCH       CASCADE            MT   PUBLIC

            ESTIMATED 1 INCH HAIL JUST SOUTH OF VAUGHN.

&&

BRUSDA

The office that day

Everything else NWS Great Falls, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 4, 6:13 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark, Teton	62 min
Jun 4, 6:34 PM MDT	Special Weather Statement	TFX	Cascade	41 min
Jun 4, 7:53 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill, Liberty	67 min
Jun 4, 8:06 PM MDT	Tornado Warning	TFX	Chouteau	39 min
Jun 4, 8:48 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill, Liberty	72 min
Jun 4, 9:05 PM MDT	Special Weather Statement	TFX	Pondera	25 min
Jun 4, 9:14 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Liberty, Pondera, Teton, Toole	61 min
Jun 4, 9:49 PM MDT	Special Weather Statement	TFX	Pondera	41 min
Jun 4, 10:07 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera, Teton, Toole	38 min
Jun 4, 10:15 PM MDT	Tornado Warning	TFX	Toole	45 min
Jun 4, 10:31 PM MDT	Special Weather Statement	TFX	Pondera	44 min
Jun 4, 10:41 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera, Teton	49 min
Jun 4, 10:44 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Liberty, Pondera, Teton, Toole	61 min
Jun 4, 11:47 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Liberty, Toole	73 min
Jun 5, 1:48 PM MDT	Winter Weather Advisory	TFX		23 hr
Jun 5, 2:24 PM MDT	Special Weather Statement	TFX	Broadwater	51 min
Jun 5, 3:05 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Cascade, Lewis and Clark, Meagher	40 min
Jun 5, 3:33 PM MDT	Special Weather Statement	TFX	Lewis and Clark	42 min
Jun 5, 3:38 PM MDT	Severe Thunderstorm Warning	TFX	Meagher	52 min
Jun 5, 3:49 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	13 min
Jun 5, 3:49 PM MDT	Tornado Warning	TFX	Meagher	26 min
Jun 5, 3:57 PM MDT	Special Weather Statement	TFX	Broadwater	48 min
Jun 5, 4:01 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark, Teton	74 min
Jun 5, 4:13 PM MDT	Special Weather Statement	TFX	Cascade	47 min
Jun 5, 4:21 PM MDT	Special Weather Statement	TFX	Meagher	39 min
Jun 5, 4:25 PM MDT	Special Weather Statement	TFX	Cascade	50 min
Jun 5, 4:27 PM MDT	Special Weather Statement	TFX	Meagher	48 min
Jun 5, 4:40 PM MDT	Special Weather Statement	TFX	Broadwater	50 min
Jun 5, 4:45 PM MDT	Special Weather Statement	TFX	Lewis and Clark	45 min
Jun 5, 4:58 PM MDT	Special Weather Statement	TFX	Jefferson	47 min
Jun 5, 4:59 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark, Teton	61 min
Jun 5, 5:04 PM MDT	Special Weather Statement	TFX	Cascade	41 min
Jun 5, 5:13 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin, Meagher	25 min
Jun 5, 5:37 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	53 min
Jun 5, 5:40 PM MDT	Tornado Warning	TFX	Fergus, Judith Basin	35 min
Jun 5, 5:53 PM MDT	Special Weather Statement	TFX	Silver Bow	52 min

Nearby

Severe Thunderstorm Warnings in Montana, 2012 Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.