Alert archive / Montana / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 90, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jul 23, 2008, 10:19 PM MDT for Pondera County, Teton 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 counties it named.
The facts
- Issued
- Jul 23, 2008, 10:19 PM MDT (04:19 UTC)
- Expired
- Jul 23, 2008, 11:00 PM MDT
- In force
- 41 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
Counties Pondera County, MT, Teton County, MT
The radar
The Great Falls radar (KTFX), 90 km from the middle of the area, began a volume at 04:21 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
Great_falls, MT (KTFX), launched 00:00Z, 4.3 hours before the alert went out and 138 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2742 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 23, 9:46 PM MDT, 33 minutes earlier.
Area forecast discussion, Jul 23, 9:46 PM MDT, 33 minutes before
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</html>Hazardous weather outlook, Jul 23, 5:23 AM MDT, 16 hours 56 minutes before
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Local storm report, Jul 23, 10:02 PM MDT, 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
1002 PM MDT WED JUL 23 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0727 PM TSTM WND GST W FLOWEREE 47.73N 111.03W
07/23/2008 E70 MPH CHOUTEAU MT TRAINED SPOTTER
WIND GUST OF 70 MPH ESTIMATED DUE TO WIND BREAKING
BRANCHES UP TO 2 INCHES IN DIAMETER. HEAVY RAIN ALSO
FELL...AT LEAST 0.40 INCHES AS IT WAS WIND BLOWN. WATER
RUNNING DOWN THE ROADS BUT NO FLOODING. RAIN AND WIND
OCCURRED FROM APPROXIMATELY 707 PM MDT UNTIL 727 PM MDT.
&&
COULSTONLocal storm report, Jul 23, 10:06 PM MDT, 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
1006 PM MDT WED JUL 23 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0616 PM HEAVY RAIN CONRAD 48.17N 111.95W
07/23/2008 M0.20 INCH PONDERA MT TRAINED SPOTTER
SPOTTER REPORTED 10 TO 15 MINUTES OF HEAVY RAIN THAT JUST
ENDED AND TOTALED 0.20 INCHES. THERE IS WATER RUNNING
DOWN THE ROADS CAUSING MINOR STREET FLOODING.
&&
COULSTONThe office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 7:59 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau | 39 min |
| Jul 23, 8:54 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark | 51 min |
| Jul 23, 9:36 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark, Meagher | 54 min |
| Jul 23, 10:25 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin, Meagher | 50 min |
| Jul 23, 10:32 PM MDT | Tornado Warning | TFX | Pondera | 28 min |
| Jul 23, 10:55 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Toole | 50 min |
| Jul 23, 11:45 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 30 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2008Every 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.