Alert archive / Montana / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 73, NWS Great Falls, MT

July 4, 2008Lewis and Clark County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 4, 2008, 8:21 PM MDT for Lewis and Clark County, Montana. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 4, 2008, 8:21 PM MDT (02:21 UTC)
Expired: Jul 4, 2008, 9:00 PM MDT
In force: 39 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon

County Lewis and Clark County, MT

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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
Jul 4, 2:04 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 2.4 hours before the alert went out and 156 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: 838 J/kg
Mixed-layer CIN: -172 J/kg
Mixed-layer LCL: 2852 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

000 
WUUS55 KTFX 050221
SVRTFX
MTC049-050300-
/O.NEW.KTFX.SV.W.0073.080705T0221Z-080705T0300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREAT FALLS MT
821 PM MDT FRI JUL 4 2008

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN LEWIS AND CLARK COUNTY IN WEST CENTRAL MONTANA...

* UNTIL 900 PM MDT

* AT 818 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 14 MILES NORTHEAST OF GARRISON...MOVING
  NORTHEAST AT 33 MPH.

* THE SEVERE THUNDERSTORM WILL GENERALLY REMAIN OVER RURAL AREAS OF
  SOUTHERN LEWIS AND CLARK COUNTY.

HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 70 MPH ARE LIKELY WITH
THIS STORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT
FRIDAY EVENING FOR WESTERN MONTANA.

LAT...LON 4723 11229 4682 11192 4668 11245 4669 11253
      4670 11255 4682 11256 4683 11261 4682 11273
      4683 11273
TIME...MOT...LOC 0221Z 237DEG 28KT 4672 11264

$$

COHEN

2 follow-up statements

000 
WWUS55 KTFX 050246
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
847 PM MDT FRI JUL 4 2008

MTC049-050300-
/O.CON.KTFX.SV.W.0073.000000T0000Z-080705T0300Z/
LEWIS AND CLARK MT-
847 PM MDT FRI JUL 4 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM MDT
FOR SOUTHERN LEWIS AND CLARK COUNTY...

AT 846 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES NORTHWEST OF CANYON
CREEK...OR 26 MILES NORTHWEST OF HELENA...MOVING NORTHEAST AT 32 MPH.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT
FRIDAY EVENING FOR WESTERN MONTANA.

LAT...LON 4723 11229 4682 11192 4668 11245 4669 11253
      4670 11255 4682 11256 4683 11261 4682 11273
      4683 11273
TIME...MOT...LOC 0247Z 237DEG 28KT 4690 11233

$$

COHEN

000 
WWUS55 KTFX 050253
SVSTFX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
853 PM MDT FRI JUL 4 2008

MTC049-050303-
/O.EXP.KTFX.SV.W.0073.000000T0000Z-080705T0300Z/
LEWIS AND CLARK MT-
853 PM MDT FRI JUL 4 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LEWIS AND CLARK
COUNTY WILL EXPIRE AT 900 PM MDT...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE SEVERE THUNDERSTORM
THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER SEVERE...
THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT
FRIDAY EVENING FOR WESTERN MONTANA.

LAT...LON 4723 11229 4682 11192 4668 11245 4669 11253
      4670 11255 4682 11256 4683 11261 4682 11273
      4683 11273
TIME...MOT...LOC 0253Z 237DEG 28KT 4692 11227

$$

COHEN

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 4, 5:30 PM MDT, 2 hours 51 minutes earlier.

Area forecast discussion, Jul 4, 5:30 PM MDT, 2 hours 51 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREAT FALLS MT
530 PM MDT FRI JUL 4 2008

UPDATED FOR AVIATION

.DISCUSSION...

...SEVERE THUNDERSTORM WATCH ISSUED FOR SOUTHWEST AND CENTRAL
MONTANA IN EFFECT UNTIL 10 PM MDT...

...SEVERE WEATHER LIKELY THIS AFTERNOON AND EVENING OVER THE
ENTIRE AREA...

STRONG INSTABILITY IS FORECAST TO DEVELOP THIS AFTERNOON OVER THE
ENTIRE FORECAST AREA...AS A VIGOROUS UPPER LEVEL SHORTWAVE TROUGH
AND ASSOCIATED JET STREAK AFFECT THE REGION. LATEST 12Z OPERATIONAL
FORECAST MODELS SHOW A 55KT TO 60KT JET STREAK ARRIVING OVER
NORTHWEST MONTANA THIS EVENING...WITH SURFACE BASED CAPES EXCEEDING
2500 J/KG. AN UPPER LEVEL VORT MAX OVER WESTERN WASHINGTON IS
EXTRAPOLATED TO BE JUXTAPOSED WITH THIS JET STREAK BY 6PM. MODELS
HAVE INDICATED A STRENGTHENING TREND WITH THIS JET STREAK...WITH
EARLIER RUNS 10 KTS OR SO LESS. ALSO...LATEST RUNS SHOW A FURTHER
NORTHWARD JET PLACEMENT...SUGGESTING THAT THE FORECAST AREA WILL
HAVE A GREAT CHANCE OF EXPERIENCING FAVORABLE ASCENT IN THE RIGHT
ENTRANCE REGION OF THE JET THIS EVENING.

SEVERAL COMPLICATING FACTORS HAVE BEEN NOTED IN THE LOW LEVELS. FOR
EXAMPLE...LOW LEVEL MOISTURE POOLING NORTH OF A DEVELOPING SURFACE
CYCLONE OVER CENTRAL MONTANA HAS BEEN A BIT STRONGER THAN
ANTICIPATED. CLOUD COVERAGE THIS MORNING OVER THE NORTHERN HALF OF
THE FORECAST AREA MAY LIMIT DEEPER MIXING...THUS MAINTAINING HIGHER
LOW LEVEL MOISTURE AND INSTABILITY THROUGH THE DAY. DEWPOINTS IN THE
LOWER 60S HAVE ALREADY BEEN NOTED ON EITHER SIDE OF THE
DIVIDE...RESULTING IN RUC-ANALYSIS SURFACE-BASED CAPES FROM
1500-2000 J/KG ALREADY AT 11 AM MDT...WITH MIXED LAYER CAPES ABOUT
500 J/KG LOWER. HOWEVER...THERE STILL REMAINS A CAP IN THE LOWER
ATMOSPHERE THIS MORNING...WITH CONVECTIVE INHIBITION OVER 100 J/KG
ACROSS THE FORECAST AREA. WITH TIME...SUFFICIENT COLD AIR ADVECTION
ALOFT IN ASSOCIATION WITH HEIGHT FALLS WITH THE APPROACHING UPSTREAM
TROUGH WILL HELP TO ERODE THE CAP...WITH CONVECTIVE INITIATION
EXPECTED OVER THE HIGHER TERRAIN BY 2 PM MDT OR SO.
INTERESTINGLY...A LEAD SHORTWAVE TROUGH WAS SUFFICIENT FOR
HIGHER-BASED STORMS OVER NORTHWEST MONTANA THAT TRACKED INTO
ALBERTA. AN OUTFLOW BOUNDARY IS SURGING SOUTHWARD...SHIFTING WINDS
TO NORTHEASTERLY IMMEDIATELY BEHIND IT. THIS BOUNDARY IS FORECAST TO
BECOME DIFFUSE THIS AFTERNOON...AS IT TRACKS AWAY FROM ITS PARENT
CONVECTION. HOWEVER...REMAINING LOW LEVEL VORTICITY WITH THIS
BOUNDARY MAY BECOME A KEY PLAYER IN CONVECTIVE ENHANCEMENTS THIS
AFTERNOON.

AS IT CURRENTLY STANDS...MODELS ARE ALL OVER THE PLACE WITH REGARD
TO CONVECTIVE COVERAGE. THE RUC AND NAM SHOW A FASTER NORTH-SOUTH
BOUNDARY PASSAGE...BRINGING WESTERLY WINDS ACROSS MUCH OF THE REGION
BY MID-AFTERNOON...AND WITH THE GFS SHOWING A MUCH SLOWER PASSAGE.
WITH THE UPSTREAM ASCENT BEING RATHER WEAK AT FIRST...WE ONLY EXPECT
ISOLATED STORMS TO DEVELOP THIS AFTERNOON...WITH MORE WIDESPREAD
COVERAGE AFTER 600 PM...ESPECIALLY OVER NORTH CENTRAL MONTANA.
COVERAGE COULD BE MORE SPOTTY OVER SOUTHWEST MONTANA...THOUGH LATEST
RUC SHOWS WIDESPREAD COVERAGE THERE AS WELL. OVERALL CONVECTIVE
MORPHOLOGY IS ALSO VERY TRICKY...AS SOLUTIONS FAVORING THE WESTERLY
LOW-LEVEL FLOW WOULD SUPPORT MORE UNIDIRECTIONAL WIND PROFILES AND A
SQUALL LINE THREAT WITH THE DEEP-LAYER SHEAR VECTOR ORIENTED
PARALLEL TO THE LOW LEVEL BOUNDARY. STRENGTHENING SOUTHWESTERLY 700
MB FLOW OVER 30KTS MAY ENHANCE DESCENDING REAR INFLOW JETS WITH ANY
SQUALL LINES AS WELL AS THE DAMAGING WIND POTENTIAL. ON THE OTHER
HAND...FAR EASTERN PORTIONS OF CENTRAL MONTANA WILL LIKELY
EXPERIENCE LOW LEVEL FLOW BACKED TO THE SOUTHEAST FOR A LONGER
PERIOD OF TIME...AND THUS A GREATER CHANCE FOR ROTATING UPDRAFTS.
HOWEVER...AS TOTAL SHEAR MAGNITUDE WITHIN THE INSTABILITY LAYER
INCREASES TO OVER 50 KTS THIS EVENING...EMBEDDED MESOCYCLONES AND
VORTICES WITHIN SQUALL LINES WILL BECOME POSSIBLE...ESPECIALLY AS
STRONGER PACIFIC MOISTURE AND ASSOCIATED INSTABILITY POOL INTO THE
REGION WEST OF THE DIVIDE. ONLY WEAK LOW LEVEL WESTERLY FLOW WILL
INHIBIT ANY SUBSTANTIAL DOWNSLOPE DRYING. ESSENTIALLY...ALL MODES OF
CONVECTION WILL BE POSSIBLE THROUGH EVENING...WITH LARGE
HAIL...DAMAGING WINDS...AND ISOLATED TORNADOES ALL POSSIBLE. A
SPECIAL 18Z SOUNDING HAS BEEN RELEASED TO COLLECT ADDITIONAL
ENVIRONMENTAL DATA. ACOHEN

SATURDAY...TEMPERATURES WILL BE COOLER BUT STILL SLIGHTLY ABOVE
SEASONAL NORMALS. SOME INSTABILITY OVER THE MOUNTAINS OF SOUTHWEST
MONTANA MAY RESULT IN ISOLATED AFTERNOON THUNDERSTORMS. BRITTON

SATURDAY NIGHT THROUGH SUNDAY...CONTINUE TO SEE SERIES OF WEATHER
SYSTEMS WORK THROUGH REGION KEEPING RIDGE FLAT. ENOUGH INSTABILITY
TO CREATE SOME SHOWERS AND THUNDERSTORMS...MAINLY SOUTHWEST WITH
TEMPERATURES SEASONABLY WARM. LOSS

&&

.AVIATION...
UPDATED 2330Z.
A MOIST AND UNSTABLE SOUTHWEST FLOW ALOFT...COMBINED WITH A PACIFIC
COLD FRONT THIS EVENING...WILL BRING NUMEROUS SHOWERS AND
THUNDERSTORMS...WITH SOME THUNDERSTORMS BEING SEVERE WITH DAMAGING
WINDS AND LARGE HAIL UNTIL 04Z. THUNDERSTORMS WILL DECREASE LATER
THIS EVENING. VFR CONDITIONS WILL PREVAIL EXCEPT FOR LOCAL IFR/MVFR
IN AND AROUND THUNDERSTORMS. WILLIAMSON DC

&&

.FIRE WEATHER...
UPDATED 314 PM MDT.
SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS
SOUTHWEST...CENTRAL...AND NORTH CENTRAL MONTANA THIS AFTERNOON AND
CONTINUE INTO THIS EVENING. TEMPERATURES THIS AFTERNOON ARE
GENERALLY IN THE UPPER 80S TO MID 90S WITH DEWPOINTS IN THE UPPER
30S TO MID 50S. LOWER LEVELS OF THE ATMOSPHERE REMAIN RATHER DRY.
THE MAIN THREAT FROM THESE STORMS WILL BE STRONG GUSTY WINDS AND
OCCASIONAL DRY LIGHTNING. ALSO...BOTH THE OBSERVED FIRE DANGER CLASS
FOR YESTERDAY AND THE FORECAST FIRE DANGER FOR TODAY ARE IN THE
MODERATE RANGE. WILL THEREFORE ADDRESS THE POTENTIAL FOR DRY
THUNDERSTORMS WITH A HEADLINE IN THE FIRE WEATHER PLANNING FORECAST.
OVERNIGHT EXPECT COOL TEMPERATURES AND GOOD RELATIVE HUMIDITY
RECOVERIES. SATURDAY AND SUNDAY TEMPERATURES WILL BE SOMEWHAT COOLER
WITH SLIGHTLY LOWER RELATIVE DAYTIME HUMIDITIES...BUT GOOD OVERNIGHT
RECOVERIES. BRITTON

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  55  81  54  82 /  50  20  20  20
CTB  50  78  51  79 /  40  10  10  10
HLN  58  83  56  85 /  50  20  20  20
BZN  52  79  52  84 /  40  30  30  20
WEY  46  72  45  77 /  30  30  30  30
DLN  49  78  49  79 /  50  30  20  20
HVR  55  85  55  84 /  40  10  10  10
LWT  51  76  52  82 /  40  20  20  20

&&

.TFX WATCHES/WARNINGS/ADVISORIES...

SEVERE THUNDERSTORM WATCH NUMBER 656 IN EFFECT 2 PM MDT UNTIL 10 PM
MDT.

SEVERE THUNDERSTORM WATCH NUMBER 657 IN EFFECT 3 PM MDT UNTIL 10 PM
MDT.

&&

SHORT TERM...COHEN
LONG TERM...LOSS
AVIATION...WILLIAMSON DC

WEATHER.GOV/GREATFALLS

Hazardous weather outlook, Jul 4, 3:20 PM MDT, 5 hours 1 minute before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE GREAT FALLS MT
320 PM MDT FRI JUL 4 2008

MTZ008>015-044>055-051230-
BEAVERHEAD-NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-HILL-
CASCADE-CHOUTEAU-CENTRAL AND SOUTHERN LEWIS AND CLARK-MADISON-
TOOLE-LIBERTY-EASTERN PONDERA-BLAINE-
SOUTHERN ROCKY MOUNTAIN FRONT-EASTERN TETON-JUDITH BASIN-FERGUS-
JEFFERSON-BROADWATER-MEAGHER-GALLATIN-
320 PM MDT FRI JUL 4 2008

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE ENTIRE AREA UNTIL
1000 PM MDT THIS EVENING. SCATTERED SEVERE THUNDERSTORMS ARE
LIKELY THIS AFTERNOON AND TONIGHT OVER THE WATCH AREA. DAMAGING
WINDS...LARGE HAIL...AND HEAVY RAIN WILL BE POSSIBLE. AN ISOLATED
TORNADO MAY ALSO BE POSSIBLE OVER CENTRAL AND NORTH CENTRAL MONTANA.

LIGHTNING IS ALWAYS A CONCERN WITH ANY THUNDERSTORM. THOSE
PLANNING OUTDOOR HOLIDAY ACTIVITIES TODAY AND TONIGHT ARE
ENCOURAGED TO FREQUENTLY CHECK THE LATEST FORECASTS...
WATCHES...AND WARNINGS FROM THE NATIONAL WEATHER SERVICE. THOSE
OUTDOORS SHOULD MONITOR THE SKY FOR DEVELOPING STORMS AND HEAD FOR
SHELTER AT THE FIRST INDICATION OF A THUNDERSTORM.

ALSO...WITH THE RECENT RAINFALL AND WARM TEMPERATURES...ELEVATED
WATER LEVELS MAY OCCUR ON AREA RIVERS...CREEKS...AND STREAMS. USE
EXTRA CAUTION WHEN VENTURING OUT ON THE WATER THROUGH THIS WEEKEND.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS FOR SATURDAY THROUGH
THURSDAY WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION HAS BEEN REQUESTED. WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO
STANDARD OPERATING PROCEDURES.

ACOHEN

In the hours before

Local storm report, Jul 4, 6:20 PM MDT, 2 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
620 PM MDT FRI JUL 04 2008

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

0418 PM     HAIL             4 W LENNEP              46.42N 110.63W
07/04/2008  E1.00 INCH       MEAGHER            MT   TRAINED SPOTTER

            HAIL ENDED AT 404 PM MDT

0617 PM     HAIL             4 S CHOTEAU             47.75N 112.18W
07/04/2008  E1.75 INCH       TETON              MT   TRAINED SPOTTER

&&

BRITTON

Local storm report, Jul 4, 7:28 PM MDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
728 PM MDT FRI JUL 04 2008

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

0722 PM     HAIL             GERALDINE               47.60N 110.27W
07/04/2008  E0.88 INCH       CHOUTEAU           MT   LAW ENFORCEMENT

&&

DREILLY

Local storm report, Jul 4, 7:41 PM MDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
741 PM MDT FRI JUL 04 2008

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

0720 PM     HAIL             STANFORD                47.15N 110.22W
07/04/2008  E0.50 INCH       JUDITH BASIN       MT   TRAINED SPOTTER

&&

DREILLY

Local storm report, Jul 4, 8:01 PM MDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
801 PM MDT FRI JUL 04 2008

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

0755 PM     TSTM WND GST     BIG SANDY               48.18N 110.11W
07/04/2008  E70.00 MPH       CHOUTEAU           MT   TRAINED SPOTTER

            WIND GUSTS 70 TO 80 MPH ESTIMATED. BRANCHES DOWN.

&&

DREILLY

Local storm report, Jul 4, 8:08 PM MDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
808 PM MDT FRI JUL 04 2008

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

0800 PM     TSTM WND GST     16 SW RUDYARD           48.40N 110.80W
07/04/2008  E70 MPH          LIBERTY            MT   TRAINED SPOTTER

&&

DREILLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 6:02 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus, Judith Basin	43 min
Jul 4, 6:07 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin	38 min
Jul 4, 6:12 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera, Teton, Toole	48 min
Jul 4, 6:27 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Judith Basin, Lewis and Clark, Teton	48 min
Jul 4, 6:29 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	31 min
Jul 4, 6:32 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	43 min
Jul 4, 6:47 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Judith Basin	25 min
Jul 4, 6:57 PM MDT	Tornado Warning	TFX	Pondera, Teton	21 min
Jul 4, 6:58 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Fergus, Judith Basin, Teton	47 min
Jul 4, 7:00 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Pondera, Teton	45 min
Jul 4, 7:04 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Teton, Toole	28 min
Jul 4, 7:38 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Lewis and Clark, Liberty, Pondera, Teton, Toole	52 min
Jul 4, 7:42 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Hill, Liberty	63 min
Jul 4, 8:08 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty	67 min
Jul 4, 8:36 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	39 min
Jul 4, 8:43 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill	32 min
Jul 4, 9:15 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	45 min

Nearby

Severe Thunderstorm Warnings in Montana, 2008 Every severe thunderstorm warning in 2008

Sources

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