Alert archive / Montana / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 105, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Aug 10, 2013, 8:15 PM MDT for Glacier County, Pondera County, Teton County, Montana. It was in force for 45 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
- Aug 10, 2013, 8:15 PM MDT (02:15 UTC)
- Expired
- Aug 10, 2013, 9:00 PM MDT
- In force
- 45 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
Counties Glacier County, MT, Pondera County, MT, Teton County, MT
The radar
The Great Falls radar (KTFX), 121 km from the middle of the area, began a volume at 02:19 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, 2.3 hours before the alert went out and 298 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.
- Mixed-layer CAPE
- 245 J/kg
- Mixed-layer CIN
- -146 J/kg
- Mixed-layer LCL
- 2795 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.5
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 Aug 10, 5:45 PM MDT, 2 hours 30 minutes earlier.
Area forecast discussion, Aug 10, 5:45 PM MDT, 2 hours 30 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GREAT FALLS MT 525 AM MDT SAT AUG 10 2013 MTZ008-052-111200- BEAVERHEAD-JEFFERSON- 525 AM MDT SAT AUG 10 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST MONTANA. .DAY ONE...TODAY AND TONIGHT A RED FLAG WARNING IS IN EFFECT FOR THIS AFTERNOON AND EVENING AS A MIX OF WET AND DRY THUNDERSTORMS MOVE THROUGH PORTIONS OF SOUTHWEST MONTANA. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. MTZ009>015-044>051-053>055-111200- 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-BROADWATER-MEAGHER-GALLATIN- 525 AM MDT SAT AUG 10 2013 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 IS LOW. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
In the hours before
Local storm report, Aug 10, 4:23 PM MDT, 3 hours 52 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
423 PM MDT SAT AUG 10 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0420 PM HAIL 12 W WHITEHALL 45.87N 112.35W
08/10/2013 E0.50 INCH JEFFERSON MT TRAINED SPOTTER
HAIL COVERING GROUND UP TO ONE INCH DEEP. HAIL FELL FOR
12 MINUTES WITH ESTIMATED 0.40 INCHES PRECIPITATION
&&
PNSpecial weather statement, Aug 10, 4:27 PM MDT, 3 hours 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREAT FALLS MT
427 PM MDT SAT AUG 10 2013
MTZ009-102315-
NORTHERN ROCKY MOUNTAIN FRONT MT-
427 PM MDT SAT AUG 10 2013
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN GLACIER COUNTY UNTIL
515 PM MDT...
AT 426 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 33 MILES NORTH OF
WEST GLACIER TO 24 MILES NORTH OF KIOWA...AND MOVING SOUTHEAST AT 10
MPH.
HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.
* LOCATIONS IMPACTED INCLUDE...
BABB...
SAINT MARY...
LAT...LON 4901 11334 4866 11315 4871 11372 4879 11379
4882 11378 4884 11386 4882 11393 4883 11401
4885 11401 4889 11407 4891 11403 4901 11407
TIME...MOT...LOC 2227Z 314DEG 7KT 4898 11394 4884 11350
SUKLocal storm report, Aug 10, 5:32 PM MDT, 2 hours 43 minutes before
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</html>The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 6:02 PM MDT | Special Weather Statement | TFX | Meagher | 43 min |
| Aug 10, 6:49 PM MDT | Special Weather Statement | TFX | Glacier | 41 min |
| Aug 10, 6:50 PM MDT | Special Weather Statement | TFX | Wheatland | 40 min |
| Aug 10, 6:56 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 49 min |
| Aug 10, 7:41 PM MDT | Flash Flood Watch | TFX | 3 hr | |
| Aug 10, 7:45 PM MDT | Special Weather Statement | TFX | Teton | 45 min |
| Aug 10, 7:47 PM MDT | Special Weather Statement | TFX | Glacier | 43 min |
| Aug 10, 8:56 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 49 min |
| Aug 10, 8:58 PM MDT | Special Weather Statement | TFX | Teton | 47 min |
| Aug 10, 11:37 PM MDT | Areal Flood Advisory | TFX | Cascade | 6 hr |
| Aug 11, 3:55 AM MDT | Flash Flood Watch | TFX | 17 hr | |
| Aug 11, 2:33 PM MDT | Special Weather Statement | TFX | Madison | 42 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2013Every severe thunderstorm warning in 2013
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.