Alert archive / Montana / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 100, NWS Great Falls, MT

July 26, 2008Blaine County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 26, 2008, 3:17 PM MDT for Blaine County, Montana. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 26, 2008, 3:17 PM MDT (21:17 UTC)
Expired: Jul 26, 2008, 4:15 PM MDT
In force: 58 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon

County Blaine County, MT

The radar

The Glasgow radar (KGGW), 174 km from the middle of the area, began a volume at 21:16 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.

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 26, 2:41 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 9.3 hours before the alert went out and 163 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: 560 J/kg
Mixed-layer CIN: -311 J/kg
Mixed-layer LCL: 1786 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

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, 2:47 PM MDT, 30 minutes earlier.

Area forecast discussion, Jul 26, 2:47 PM MDT, 30 minutes before

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Hazardous weather outlook, Jul 26, 6:02 AM MDT, 9 hours 15 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREAT FALLS MT
602 AM MDT SAT JUL 26 2008

MTZ008>015-044>055-271215-
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-
602 AM MDT SAT JUL 26 2008

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

.DAY ONE...TODAY AND TONIGHT

ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE ACROSS CENTRAL AND
NORTH CENTRAL MONTANA THIS AFTERNOON AND EVENING...WITH SMALL HAIL
AND WIND GUSTS GREATER THAN 60 MPH FOR A TIME.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

ISOLATED STRONG THUNDERSTORMS WILL BE POSSIBLE ACROSS NORTH
CENTRAL MONTANA SUNDAY AFTERNOON AND EVENING...WITH SMALL HAIL
AND WIND GUSTS GREATER THAN 50 MPH FOR A TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Local storm report, Jul 26, 11:56 AM MDT, 3 hours 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
1156 AM MDT SAT JUL 26 2008

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

0940 AM     HAIL             CUT BANK                48.63N 112.33W
07/26/2008  E0.75 INCH       GLACIER            MT   PUBLIC

            MOST HAILSTONES WERE ABOUT 1/4 INCH IN DIAMETER

&&

MCGINNIS

Local storm report, Jul 26, 1:43 PM MDT, 1 hour 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
143 PM MDT SAT JUL 26 2008

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

1230 PM     HAIL             30 NNW CHESTER          48.91N 111.22W
07/26/2008  E1.50 INCH       LIBERTY            MT   PUBLIC

            IN WHITLASH, HAILED FOR 15 MINUTES, MOST STONES ABOUT
            QUARTER SIZED, STONES BOUNCED OFF GROUND A LITTLE BIT

&&

MCGINNIS

Local storm report, Jul 26, 3:02 PM MDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
302 PM MDT SAT JUL 26 2008

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

0256 PM     HAIL             HAVRE                   48.54N 109.68W
07/26/2008  M0.88 INCH       HILL               MT   TRAINED SPOTTER

            HEAVY RAIN WITH WINDS GUSTING UP TO 50 MPH.

&&

SAUCIER

Local storm report, Jul 26, 3:06 PM MDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
306 PM MDT SAT JUL 26 2008

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

1225 PM     HAIL             21 NNE CHESTER          48.79N 110.79W
07/26/2008  E1.75 INCH       LIBERTY            MT   LAW ENFORCEMENT

            LAIRD ROAD

&&

MCGINNIS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 8:55 AM MDT	Severe Thunderstorm Warning	TFX	Glacier, Pondera, Toole	50 min
Jul 26, 10:34 AM MDT	Severe Thunderstorm Warning	TFX	Toole	41 min
Jul 26, 11:48 AM MDT	Severe Thunderstorm Warning	TFX	Toole	42 min
Jul 26, 12:20 PM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty, Toole	40 min
Jul 26, 1:57 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	48 min
Jul 26, 2:16 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Hill	59 min
Jul 26, 3:49 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	26 min
Jul 26, 4:14 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	31 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; radar from the NEXRAD Level II archive.