Alert archive / Montana / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 96, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Aug 3, 2013, 3:03 PM MDT for Fergus County, Montana. It was in force for 72 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 3, 2013, 3:03 PM MDT (21:03 UTC)
- Expired
- Aug 3, 2013, 4:15 PM MDT
- In force
- 72 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
County Fergus County, MT
The radar
The Billings radar (KBLX), 164 km from the middle of the area, began a volume at 21:02 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 |
|---|---|---|---|
| Aug 3, 1:50 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 9.1 hours before the alert went out and 471 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
- 51 J/kg
- Mixed-layer CIN
- -392 J/kg
- Mixed-layer LCL
- 1880 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 198 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 Aug 2, 5:20 PM MDT, 21 hours 43 minutes earlier.
Area forecast discussion, Aug 2, 5:20 PM MDT, 21 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 3, 12:57 PM MDT | Special Weather Statement | TFX | Judith Basin | 48 min |
| Aug 3, 1:09 PM MDT | Special Weather Statement | TFX | Blaine | 51 min |
| Aug 3, 1:19 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin | 41 min |
| Aug 3, 1:25 PM MDT | Special Weather Statement | TFX | Judith Basin | 50 min |
| Aug 3, 1:36 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 39 min |
| Aug 3, 1:59 PM MDT | Special Weather Statement | TFX | Chouteau | 46 min |
| Aug 3, 2:19 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 56 min |
| Aug 3, 2:30 PM MDT | Special Weather Statement | TFX | 45 min | |
| Aug 3, 2:37 PM MDT | Special Weather Statement | TFX | Blaine | 38 min |
| Aug 3, 3:05 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 40 min |
| Aug 3, 3:22 PM MDT | Special Weather Statement | TFX | Toole | 38 min |
| Aug 3, 4:01 PM MDT | Special Weather Statement | TFX | Blaine | 44 min |
| Aug 3, 4:04 PM MDT | Special Weather Statement | TFX | Liberty | 41 min |
| Aug 3, 5:52 PM MDT | Areal Flood Advisory | TFX | Blaine, Hill | 6 hr |
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.