Alert archive / Montana / Special Weather Statements in 2012

Special Weather Statement, NWS Great Falls, MT

July 23, 2012Beaverhead County, Montana

NWS Great Falls, MT issued this special weather statement at Jul 23, 2012, 1:49 AM MDT for Beaverhead County, Montana. It was in force for 41 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 23, 2012, 1:49 AM MDT (07:49 UTC)
Expired: Jul 23, 2012, 2:30 AM MDT
In force: 41 min
Issued by: NWS Great Falls, MT

County Beaverhead County, MT

The radar

The Missoula radar (KMSX), 208 km from the middle of the area, began a volume at 07:52 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 nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 7.8 hours before the alert went out and 369 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: 2959 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 22, 10:40 PM MDT, 3 hours 9 minutes earlier.

Area forecast discussion, Jul 22, 10:40 PM MDT, 3 hours 9 minutes before

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Hazardous weather outlook, Jul 22, 3:45 AM MDT, 22 hours 4 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREAT FALLS MT
345 AM MDT SUN JUL 22 2012

MTZ008>010-012>015-044>046-048>055-231200-
BEAVERHEAD-NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-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-
345 AM MDT SUN JUL 22 2012

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

.DAY ONE...TODAY AND TONIGHT

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER FOR TODAY AND
TONIGHT IS LOW.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

A FIRE WEATHER WATCH IS IN EFFECT FOR PORTIONS OF THE REGION FOR
MONDAY AND TUESDAY.

.SPOTTER INFORMATION STATEMENT...

ANY SPOTTER REPORTS OF NEW FIRE STARTS WOULD GREATLY BE
APPRECIATED.

MTZ011-047-231200-
HILL-BLAINE-
345 AM MDT SUN JUL 22 2012

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

.DAY ONE...TODAY AND TONIGHT

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER FOR TODAY AND
TONIGHT IS LOW.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

SCATTERED SHOWERS AND THUNDERSTORMS ARE POSSIBLE IN THE HAVRE AND
HARLEM AREAS ON MONDAY. SOME STORMS COULD BE STRONG...AND PRODUCE
GUSTY WINDS.

.SPOTTER INFORMATION STATEMENT...

ANY SPOTTER REPORTS OF SEVERE WEATHER WOULD GREATLY BE
APPRECIATED.

In the hours before

Special weather statement, Jul 22, 8:39 PM MDT, 5 hours 10 minutes before

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Local storm report, Jul 22, 9:27 PM MDT, 4 hours 22 minutes before

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Local storm report, Jul 22, 9:33 PM MDT, 4 hours 16 minutes before

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Special weather statement, Jul 22, 11:38 PM MDT, 2 hours 11 minutes before

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Special weather statement, Jul 23, 1:49 AM MDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 8:39 PM MDT	Special Weather Statement	TFX	Judith Basin	51 min
Jul 22, 11:38 PM MDT	Special Weather Statement	TFX	Glacier	52 min
Jul 23, 3:45 AM MDT	Red Flag Warning	TFX	Blaine, Broadwater, Cascade, Chouteau, Fergus, Gallatin and 11 more	40 hr
Jul 23, 3:15 PM MDT	High Wind Warning	TFX		6 hr
Jul 23, 3:42 PM MDT	Special Weather Statement	TFX	Hill	48 min
Jul 23, 3:44 PM MDT	Special Weather Statement	TFX	Blaine	46 min

Nearby

Special Weather Statements in Montana, 2012 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.