Alert archive / Montana / Special Weather Statements in 2010

Special Weather Statement, NWS Great Falls, MT

August 6, 2010Glacier County, Montana

NWS Great Falls, MT issued this special weather statement at Aug 6, 2010, 5:10 PM MDT for Glacier County, Montana. It was in force for 50 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: Aug 6, 2010, 5:10 PM MDT (23:10 UTC)
Expired: Aug 6, 2010, 6:00 PM MDT
In force: 50 min
Issued by: NWS Great Falls, MT

County Glacier County, MT

The radar

The Missoula radar (KMSX), 178 km from the middle of the area, began a volume at 23:12 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 12:00Z, 11.2 hours before the alert went out and 234 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: 300 J/kg
Mixed-layer CIN: -170 J/kg
Mixed-layer LCL: 2136 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Aug 6, 3:25 PM MDT, 1 hour 45 minutes earlier.

Area forecast discussion, Aug 6, 3:25 PM MDT, 1 hour 45 minutes before

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Hazardous weather outlook, Aug 6, 3:12 PM MDT, 1 hour 58 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREAT FALLS MT
312 PM MDT FRI AUG 6 2010

MTZ008-012>015-047>055-072115-
BEAVERHEAD-CASCADE-CHOUTEAU-CENTRAL AND SOUTHERN LEWIS AND CLARK-
MADISON-BLAINE-SOUTHERN ROCKY MOUNTAIN FRONT-EASTERN TETON-
JUDITH BASIN-FERGUS-JEFFERSON-BROADWATER-MEAGHER-GALLATIN-
312 PM MDT FRI AUG 6 2010

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 UNTIL 9 PM MDT THIS
EVENING. SCATTERED THUNDERSTORMS WITH A POSSIBILITY OF HAIL AND
GUSTY WINDS ARE LIKELY.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

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

MTZ009>011-044>046-072115-
NORTHERN ROCKY MOUNTAIN FRONT-EASTERN GLACIER-HILL-TOOLE-LIBERTY-
EASTERN PONDERA-
312 PM MDT FRI AUG 6 2010

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

WHILE NO WATCH IS IN EFFECT...THE CHANCE FOR SHOWERS AND SCATTERED
THUNDERSTORMS WILL REMAIN THROUGH THE EVENING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Local storm report, Aug 6, 3:37 PM MDT, 1 hour 33 minutes before

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Special weather statement, Aug 6, 4:06 PM MDT, 1 hour 4 minutes before

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Local storm report, Aug 6, 4:23 PM MDT, 47 minutes before

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Special weather statement, Aug 6, 4:23 PM MDT, 47 minutes before

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Special weather statement, Aug 6, 4:59 PM MDT, 11 minutes before

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Special weather statement, Aug 6, 5:10 PM 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
Aug 5, 6:14 PM MDT	Special Weather Statement	TFX	Jefferson	46 min
Aug 5, 6:51 PM MDT	Special Weather Statement	TFX	Broadwater	39 min
Aug 5, 7:03 PM MDT	Special Weather Statement	TFX	Meagher	42 min
Aug 5, 7:21 PM MDT	Special Weather Statement	TFX	Lewis and Clark	39 min
Aug 5, 7:32 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	29 min
Aug 5, 8:20 PM MDT	Special Weather Statement	TFX	Meagher	40 min
Aug 5, 8:54 PM MDT	Special Weather Statement	TFX	Meagher	51 min
Aug 6, 3:11 PM MDT	Special Weather Statement	TFX	Beaverhead, Madison	64 min
Aug 6, 3:23 PM MDT	Special Weather Statement	TFX	Hill	67 min
Aug 6, 4:06 PM MDT	Special Weather Statement	TFX	Gallatin	39 min
Aug 6, 4:23 PM MDT	Special Weather Statement	TFX	Blaine	52 min
Aug 6, 4:59 PM MDT	Special Weather Statement	TFX	Blaine	61 min
Aug 6, 5:11 PM MDT	Special Weather Statement	TFX	Broadwater	49 min

Nearby

Special Weather Statements in Montana, 2010 Every special weather statement in 2010

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.