Alert archive / Montana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 59, NWS Great Falls, MT

July 26, 2012Glacier County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 26, 2012, 7:37 PM MDT for Glacier County, Montana. It was in force for 53 min. 1 report 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: Jul 26, 2012, 7:37 PM MDT (01:37 UTC)
Expired: Jul 26, 2012, 8:30 PM MDT
In force: 53 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon

County Glacier County, MT

The radar

The Great Falls radar (KTFX), 187 km from the middle of the area, began a volume at 01:40 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
Jul 26, 8:00 PM MDT	HAIL 1.75	6 Ne Santa Rita, MT	GOLF BALL SIZE 1.75 INCH HAIL... 80 PERCENT GRAIN CROP LOSS. BROKEN WINDOWS PLUS DAMAGE TO PVC SIDING.

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 one storm report to this severe thunderstorm warning; the first came 23 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 nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 1.6 hours before the alert went out and 220 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: 1 J/kg
Mixed-layer CIN: -185 J/kg
Mixed-layer LCL: 2380 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 221 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.

376 
WUUS55 KTFX 270137
SVRTFX
MTC035-270230-
/O.NEW.KTFX.SV.W.0059.120727T0137Z-120727T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
737 PM MDT THU JUL 26 2012

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN GLACIER COUNTY IN NORTH CENTRAL MONTANA...

* UNTIL 830 PM MDT

* AT 726 PM MDT...NATIONAL WEATHER SERVICE RADAR REPORTED A SEVERE   
  THUNDERSTORM 30 MILES NORTHWEST OF CUT BANK...MOVING EAST AT 20   
  MPH.

* THE SEVERE THUNDERSTORM WILL GENERALLY REMAIN OVER RURAL AREAS OF
  NORTHEASTERN GLACIER COUNTY.

HAIL TO THE SIZE OF BASEBALLS WAS REPORTED WITH THIS STORM IN 
SOUTHERN ALBERTA. IF YOU ARE IN THE PATH OF THIS STORM...TAKE 
IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL...CONTINUOUS CLOUD TO GROUND LIGHTNING IS 
OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS 
ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR 
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&


LAT...LON 4901 11245 4900 11220 4880 11220 4883 11280
      4888 11282 4901 11285 4901 11256 4901 11254
      4901 11246
TIME...MOT...LOC 0135Z 259DEG 19KT 4897 11269

$$

MPJ

2 follow-up statements

064 
WWUS55 KTFX 270209
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
809 PM MDT THU JUL 26 2012

MTC035-270230-
/O.CON.KTFX.SV.W.0059.000000T0000Z-120727T0230Z/
GLACIER MT-
809 PM MDT THU JUL 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM MDT
FOR NORTHEASTERN GLACIER COUNTY...

AT 759 PM MDT...A SEVERE THUNDERSTORM THAT IS CAPABLE OF PRODUCING 
LARGE DAMAGING HAIL UP TO BASEBALL SIZE CONTINUES.  THIS STORM IS 
LOCATED OVER EXTREME NORTHEASTERN GLACIER COUNTY...OR 26 MILES NORTH 
OF CUT BANK...MOVING EAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF 
GLACIER COUNTY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4900 11220 4880 11220 4882 11263 4887 11266
      4900 11267 4901 11256 4901 11246
TIME...MOT...LOC 0208Z 259DEG 19KT 4900 11243

$$

782 
WWUS55 KTFX 270226
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
826 PM MDT THU JUL 26 2012

MTC035-270236-
/O.EXP.KTFX.SV.W.0059.000000T0000Z-120727T0230Z/
GLACIER MT-
826 PM MDT THU JUL 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GLACIER COUNTY
WILL EXPIRE AT 830 PM MDT...

THIS THUNDERSTORM CONTINUES TO BE SEVERE AND A NEW SEVERE 
THUNDERSTORM WARNING HAS BEEN ISSUED.

LAT...LON 4900 11220 4880 11220 4882 11263 4887 11266
      4900 11267 4901 11256 4901 11246
TIME...MOT...LOC 0226Z 259DEG 19KT 4902 11229

$$

MPJ

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 Jul 26, 5:40 PM MDT, 1 hour 57 minutes earlier.

Area forecast discussion, Jul 26, 5:40 PM MDT, 1 hour 57 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
540 PM MDT THU JUL 26 2012

UPDATE TO AVIATION

.DISCUSSION...
THIS AFTERNOON THROUGH SATURDAY EVENING...NOT MUCH CHANGE EXPECTED
IN CONDITIONS OR THE OVERALL WEATHER PATTERN THROUGH THE SHORT-TERM
PERIOD...AS A LARGE RIDGE OF HIGH PRESSURE CONTINUES TO SLOWLY
STRENGTHEN OVER THE NRN ROCKIES.  RIDGE WILL PRODUCE MOSTLY DRY
CONDITIONS BETWEEN INTERMITTENT PASSAGES OF MONSOONAL/PACIFIC
MOISTURE THAT WILL LEAD TO THUNDERSTORMS EACH AFTN/EVE.
EXPECT MOST OF THE STORM ACTIVITY TO BE ALONG THE ROCKY MTN FRONT
AND OVER SOUTHWEST MT THIS EVE BUT FORECAST MODELS CONTINUE TO
INDICATE WIDER COVERAGE OF STORMS TOMORROW EVE...WITH AT LEAST
ISOLATED COVERAGE ACROSS THE CENTRAL AND HILINE COUNTIES AND
SLIGHTLY HIGHER COVERAGE OVER SOUTHWEST MT.  PRETTY MUCH THE SAME
FORECAST FOR SATURDAY WITH A REDUCED CHANCE OF STORMS ALONG THE
HILINE.  A FEW OF THESE STORMS MAY BECOME STRONG WITH BRIEF HEAVY
DOWNPOURS AND GUSTY OUTFLOW WINDS BUT OVERALL SEVERE THREAT IS LOW
THIS EVE THRU SAT EVE. TEMPERATURES WARM BACK INTO THE LOW 90S OVER
THE VALLEYS AND PLAINS TOMORROW AND SATURDAY...WITH PLEASANTLY
COOLER UPPER 70S TO MID 80S IN THE MTNS.
WARANAUSKAS

SATURDAY NIGHT THROUGH THURSDAY...THE PERIOD BEGINS WITH SHORTWAVE
ENERGY MOVING THROUGH THE UPPER RIDGE POSITION AND INITIATING
ISOLATED TO SCATTERED THUNDERSTORMS ACROSS THE AREA. BY SUNDAY
AFTERNOON THE UPPER RIDGE REBOUNDS AND USHERS IN A RELATIVELY QUIET
PERIOD THAT WILL LAST THROUGH WEDNESDAY. PERIODIC SHORTWAVE ENERGY
MOVING THROUGH THE RIDGE WILL KICK OFF ISOLATED THUNDERSTORMS...
MAINLY OVER HIGHER TERRAIN DURING THIS TIME. BY THURSDAY...THE GFS
BRINGS AN UPPER TROF ACROSS SOUTHERN CANADA WHILE THE EUROPEAN
MAINTAINS AN UPPER RIDGE OVER THE AREA. TEMPERATURES WILL
REMAIN ABOVE SEASONAL AVERAGES DURING THE PERIOD WITH THE GFS
HINTING AT READINGS DROPPING BACK TO SEASONAL READINGS ON THURSDAY.

&&

.AVIATION...
UPDATED 2340Z.
VFR CONDITIONS ARE GENERALLY EXPECTED TO CONTINUE AT LEAST THROUGH
FRIDAY AFTERNOON...UNLESS OTHERWISE SPECIFIED BELOW. HIGH PRESSURE
ALOFT WILL REMAIN OVER THE AREA THROUGH THE PERIOD. HOWEVER...A
DISTURBANCE IN THE RESULTING WESTERLY FLOW ALOFT CAUSED A LINE OF
THUNDERSTORMS TO DEVELOP AND MOVE EAST ACROSS THE AREA. THESE STORMS
HAVE ALREADY MOVED THROUGH THE KHLN KGTF AREAS AND ARE APPROACHING
THE KHVR AND KLWT AREA CURRENTLY. KLWT HAS THE GREATER CHANCE OF
HAVING MVFR CONDITIONS IN BRIEF HEAVY RAIN THROUGH 02Z WITH LOTS OF
LIGHTNING...WIND GUSTS TO 30 KT...AND SMALL HAIL.
OTHERWISE...ISOLATED THUNDERSTORMS MAY STILL DEVELOP THROUGH 03Z
ACROSS THE AREA...BUT MVFR CONDITIONS ARE UNLIKELY TO IMPACT THE
OTHER TERMINALS. STORMS SHOULD GENERALLY BE DONE ACROSS THE AREA BY
06Z. HOWEVER...ANOTHER DISTURBANCE WILL BRING ANOTHER CHANCE OF
THUNDERSTORMS TO THE AREA AFTER 17Z FRIDAY.  COULSTON/MPJ

&&

.FIRE WEATHER...
NO FIRE WEATHER HIGHLIGHTS ARE PLANNED FOR AT THIS TIME OVER THE
NEXT FEW DAYS. AFTERNOON HUMIDITIES DROPPING INTO THE TEENS TO
MID 20 PERCENT RANGE COUPLED WITH VERY WARM TEMPERATURES CAN BE
EXPECTED THROUGH AT LEAST THE MIDDLE OF NEXT WEEK. OVERALL...WINDS
SHOULD BE ON THE LIGHT SIDE MOST DAYS...BUT AN HOUR OR TWO OF
BREEZY WINDS SHOULD BE EXPECTED DURING THE PRIME AFTERNOON HEATING
HOURS (MAINLY 1 PM TO 5 PM) MOST DAYS. ADDITIONALLY...
ISOLATED/SCATTERED THUNDERSTORMS ARE POSSIBLE OVER THE FIRE DISTRICTS
THROUGH THE WEEKEND. MOST THUNDERSTORMS WILL PRODUCE OCCASIONAL TO
FREQUENT LIGHTNING AT TIMES...WITH LITTLE RAINFALL THOUGH WETTER
STORMS WILL OCCUR AS WELL.  BRUSDA/WARANAUSKAS

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  57  92  60  92 /  20  20  20  20
CTB  52  88  56  88 /  20  20  20  10
HLN  57  90  59  91 /  20  20  20  20
BZN  51  90  51  90 /  20  30  30  20
WEY  43  79  42  81 /  20  30  20  20
DLN  54  86  52  87 /  20  20  20  20
HVR  56  92  60  93 /  10  20  20  20
LWT  53  87  57  88 /  10  20  20  20

&&

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

SHORT TERM...WARANAUSKAS
LONG TERM...EMANUEL
AVIATION...MPJ/COULSTON

WEATHER.GOV/GREATFALLS

Hazardous weather outlook, Jul 26, 3:51 AM MDT, 15 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREAT FALLS MT
351 AM MDT THU JUL 26 2012

MTZ008-012>015-048>055-271200-
BEAVERHEAD-CASCADE-CHOUTEAU-CENTRAL AND SOUTHERN LEWIS AND CLARK-
MADISON-SOUTHERN ROCKY MOUNTAIN FRONT-EASTERN TETON-JUDITH BASIN-
FERGUS-JEFFERSON-BROADWATER-MEAGHER-GALLATIN-
351 AM MDT THU JUL 26 2012

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

.DAY ONE...TODAY AND TONIGHT

ISOLATED SHOWERS AND THUNDERSTORMS ARE POSSIBLE OVER THE REGION
THIS AFTERNOON AND EVENING. THE MAIN THREAT FROM ANY STRONG
THUNDERSTORMS TODAY WILL BE FREQUENT LIGHTNING AND BRIEF WIND
GUSTS FROM 45 TO 55 MPH...WITH A SMALL CHANCE FOR AN ISOLATED
SEVERE THUNDERSTORM.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SCATTERED SHOWERS AND THUNDERSTORMS ARE POSSIBLE OVER THE REGION
FRIDAY THROUGH SATURDAY. THE MAIN THREAT FROM ANY STRONG
THUNDERSTORMS WILL BE FREQUENT LIGHTNING AND BRIEF WIND GUSTS
FROM 45 TO 55 MPH...WITH A SMALL CHANCE FOR AN ISOLATED SEVERE
THUNDERSTORM.

.SPOTTER INFORMATION STATEMENT...

ANY SPOTTER REPORTS OF STRONG WIND GUSTS OR A SEVERE THUNDERSTORM
WOULD GREATLY BE APPRECIATED.

MTZ009>011-044>047-271200-
NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-HILL-TOOLE-LIBERTY-
EASTERN PONDERA-BLAINE-
351 AM MDT THU JUL 26 2012

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

.DAY ONE...TODAY AND TONIGHT

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jul 26, 4:24 PM MDT, 3 hours 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
424 PM MDT THU JUL 26 2012

MTZ008-015-262315-
BEAVERHEAD MT-MADISON MT-
424 PM MDT THU JUL 26 2012

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN MADISON AND CENTRAL
BEAVERHEAD COUNTIES UNTIL 515 PM MDT...

AT 420 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 9 MILES NORTH OF DILLON...MOVING EAST AT 25 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN OF UP TO TWO TENTHS
OF AN INCH IN LESS THAN A HALF HOUR.

* LOCATIONS IMPACTED INCLUDE...
   DILLON... LAURIN... SHERIDAN... AND  ALDER...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

IN ADDITION...THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR
LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR
ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL
WEATHER SERVICE.

LAT...LON 4552 11208 4528 11204 4525 11273 4542 11277
TIME...MOT...LOC 2224Z 262DEG 22KT 4535 11262

COULSTON

Special weather statement, Jul 26, 5:58 PM MDT, 1 hour 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
558 PM MDT THU JUL 26 2012

MTZ050-051-270100-
FERGUS MT-JUDITH BASIN MT-
558 PM MDT THU JUL 26 2012

...SIGNIFICANT WEATHER ADVISORY FOR EXTREME EASTERN JUDITH BASIN AND
SOUTHERN FERGUS COUNTIES UNTIL 700 PM MDT...

AT 555 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR MOORE...OR 10 MILES SOUTHWEST OF
LEWISTOWN...MOVING EAST AT 25 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN OF UP TO A HALF
INCH IN A HALF HOUR...AND FREQUENT DANGEROUS LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
   LEWISTOWN...
   FORESTGROVE...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

IN ADDITION...THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR
LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR
ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL
WEATHER SERVICE.

LAT...LON 4730 10832 4730 10855 4726 10860 4726 10871
      4719 10870 4717 10873 4711 10873 4710 10860
      4686 10860 4683 10972 4710 10981 4743 10831
      4735 10830
TIME...MOT...LOC 2358Z 257DEG 23KT 4699 10958

COULSTON

Local storm report, Jul 26, 6:07 PM MDT, 1 hour 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
607 PM MDT THU JUL 26 2012

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

0421 PM     TSTM WND GST     21 SE CASCADE           47.05N 111.39W
07/26/2012  M65 MPH          CASCADE            MT   MESONET

            65 MPH THUNDERSTORM WIND GUST REPORTED AT MILLEGAN
            AUTOMATED WEATHER SITE.

&&

COULSTON

Local storm report, Jul 26, 7:07 PM MDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
707 PM MDT THU JUL 26 2012

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

0608 PM     TSTM WND GST     2 WSW LEWISTOWN         47.05N 109.47W
07/26/2012  M52 MPH          FERGUS             MT   ASOS

            52 MPH THUNDERSTORM WIND GUST REPORTED AT LEWISTOWN
            ASOS SITE AT 608 PM MDT.

&&

COULSTON

Local storm report, Jul 26, 7:10 PM MDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE GREAT FALLS MT
710 PM MDT THU JUL 26 2012

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

0300 PM     HAIL             MONTANA CITY            46.54N 111.93W
07/26/2012  E0.25 INCH       JEFFERSON          MT   CO-OP OBSERVER

0421 PM     TSTM WND GST     21 SE CASCADE           47.05N 111.39W
07/26/2012  M65 MPH          CASCADE            MT   MESONET

            65 MPH THUNDERSTORM WIND GUST REPORTED AT MILLEGAN
            AUTOMATED WEATHER SITE.

0608 PM     TSTM WND GST     2 WSW LEWISTOWN         47.05N 109.47W
07/26/2012  M52 MPH          FERGUS             MT   ASOS

            52 MPH THUNDERSTORM WIND GUST REPORTED AT LEWISTOWN
            ASOS SITE AT 608 PM MDT.

&&

COULSTON

Special weather statement, Jul 26, 7:21 PM MDT, 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
721 PM MDT THU JUL 26 2012

MTZ010-044-270200-
EASTERN GLACIER MT-TOOLE MT-
721 PM MDT THU JUL 26 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN GLACIER AND
NORTHWESTERN TOOLE COUNTIES UNTIL 800 PM MDT...

AT 715 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 13 MILES WEST OF SUNBURST...OR 18 MILES NORTH OF
CUT BANK...MOVING EAST AT 25 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
   SUNBURST...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 4900 11154 4882 11150 4871 11222 4901 11233
      4901 11156
TIME...MOT...LOC 0121Z 261DEG 22KT 4888 11213

COULSTON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 7:21 PM MDT	Special Weather Statement	TFX	Toole	39 min
Jul 26, 8:24 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Toole	66 min
Jul 26, 9:40 PM MDT	Special Weather Statement	TFX	Gallatin	65 min
Jul 27, 3:05 PM MDT	Special Weather Statement	TFX	Madison	40 min
Jul 27, 3:31 PM MDT	Special Weather Statement	TFX	Madison	44 min
Jul 27, 4:31 PM MDT	Special Weather Statement	TFX	Beaverhead, Gallatin, Madison	44 min
Jul 27, 4:51 PM MDT	Special Weather Statement	TFX	Jefferson	69 min
Jul 27, 5:20 PM MDT	Special Weather Statement	TFX	Gallatin	25 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.