Alert archive / Montana / Severe Thunderstorm Watches in 2008
Severe Thunderstorm Watch 656
The Storm Prediction Center issued this severe thunderstorm watch at Jul 4, 2008, 2:04 PM MDT for 21 counties in Montana. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 4, 2008, 2:04 PM MDT (20:04 UTC)
- Expired
- Jul 4, 2008, 10:00 PM MDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 21 counties
Beaverhead County, MT, Broadwater County, MT, Cascade County, MT, Chouteau County, MT, Deer Lodge County, MT, Flathead County, MT, Glacier County, MT, Granite County, MT, Hill County, MT, Jefferson County, MT, Lake County, MT, Lewis and Clark County, MT, Liberty County, MT, Madison County, MT, Missoula County, MT, Pondera County, MT, Powell County, MT, Ravalli County, MT, Silver Bow County, MT, Teton County, MT, Toole County, MT
The radar
The Missoula radar (KMSX), 97 km from the middle of the area, began a volume at 20:06 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
41 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 3:50 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 25 min |
| Jul 4, 3:50 PM MDT | Severe Thunderstorm Warning | TFX | Pondera | 40 min |
| Jul 4, 3:56 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 49 min |
| Jul 4, 4:10 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 50 min |
| Jul 4, 4:27 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 26 min |
| Jul 4, 4:37 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 38 min |
| Jul 4, 4:41 PM MDT | Tornado Warning | TFX | Lewis and Clark | 34 min |
| Jul 4, 4:48 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 42 min |
| Jul 4, 4:57 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 48 min |
| Jul 4, 4:58 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lake, Missoula, Sanders | 47 min |
| Jul 4, 5:06 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Meagher | 39 min |
| Jul 4, 5:08 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark | 52 min |
| Jul 4, 5:13 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera | 47 min |
| Jul 4, 5:26 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Toole | 49 min |
| Jul 4, 5:38 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark, Teton | 52 min |
| Jul 4, 5:40 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lake, Missoula, Powell | 48 min |
| Jul 4, 5:45 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Meagher | 45 min |
| Jul 4, 5:52 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 38 min |
| Jul 4, 5:57 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark, Teton | 63 min |
| Jul 4, 6:02 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 43 min |
| Jul 4, 6:07 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Judith Basin | 38 min |
| Jul 4, 6:12 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera, Teton, Toole | 48 min |
| Jul 4, 6:27 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin, Lewis and Clark, Teton | 48 min |
| Jul 4, 6:29 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 31 min |
| Jul 4, 6:32 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 43 min |
| Jul 4, 6:47 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Judith Basin | 25 min |
| Jul 4, 6:57 PM MDT | Tornado Warning | TFX | Pondera, Teton | 21 min |
| Jul 4, 6:58 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Fergus, Judith Basin, Teton | 47 min |
| Jul 4, 7:00 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Pondera, Teton | 45 min |
| Jul 4, 7:04 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton, Toole | 28 min |
| Jul 4, 7:27 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Granite, Powell | 48 min |
| Jul 4, 7:38 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Lewis and Clark, Liberty, Pondera, Teton, Toole | 52 min |
| Jul 4, 7:42 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Hill, Liberty | 63 min |
| Jul 4, 8:08 PM MDT | Severe Thunderstorm Warning | TFX | Hill, Liberty | 67 min |
| Jul 4, 8:10 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Granite, Powell | 50 min |
| Jul 4, 8:21 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 39 min |
| Jul 4, 8:27 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Granite, Powell | 48 min |
| Jul 4, 8:36 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 39 min |
| Jul 4, 8:43 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 32 min |
| Jul 4, 9:15 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 45 min |
| Jul 4, 9:57 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Silver Bow | 48 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 8.1 hours before the alert went out and 169 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
- 32 J/kg
- Mixed-layer CIN
- -527 J/kg
- Mixed-layer LCL
- 2745 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 1:45 PM MDT | Mesoscale Discussion | SPC | Beaverhead, Broadwater, Cascade, Chouteau, Deer Lodge, Flathead and 15 more | 60 min |
| Jul 4, 3:02 PM MDT | Mesoscale Discussion | SPC | Blaine, Carbon, Fergus, Golden Valley, Judith Basin, Musselshell and 7 more | 58 min |
| Jul 4, 3:05 PM MDT | Severe Thunderstorm Watch | SPC | Blaine, Fergus, Gallatin, Garfield, Golden Valley, Judith Basin and 10 more | 7 hr |
| Jul 4, 5:45 PM MDT | Mesoscale Discussion | SPC | Beaverhead, Blaine, Broadwater, Cascade, Chouteau, Deer Lodge and 28 more | 60 min |
Nearby
Severe Thunderstorm Watches in Montana, 2008Every severe thunderstorm watch 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.