Alert archive / Montana / Special Weather Statements in 2021
Special Weather Statement, NWS Missoula, MT
NWS Missoula, MT issued this special weather statement at Jul 1, 2021, 5:21 PM MDT for Missoula County, Montana. It was in force for 24 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
- Jul 1, 2021, 5:21 PM MDT (23:21 UTC)
- Expired
- Jul 1, 2021, 5:45 PM MDT
- In force
- 24 min
- Issued by
- NWS Missoula, MT
County Missoula County, MT
The radar
The Missoula radar (KMSX), 41 km from the middle of the area, began a volume at 23:23 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 12:00Z, 11.4 hours before the alert went out and 224 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
- 3408 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -63 m²/s²
- 0-3 km storm-relative helicity
- -11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
644 WWUS85 KMSO 012321 SPSMSO Special Weather Statement National Weather Service Missoula MT 521 PM MDT Thu Jul 1 2021 MTZ007-043-012345- Butte/Blackfoot Region MT-Potomac/Seeley Lake Region MT- 521 PM MDT Thu Jul 1 2021 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL MISSOULA...NORTH CENTRAL GRANITE AND WEST CENTRAL POWELL COUNTIES UNTIL 545 PM MDT... At 521 PM MDT, Doppler radar was tracking a strong thunderstorm 13 miles south of Seeley Lake, or 26 miles northwest of Drummond, moving east at 5 mph. Pea size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Potomac, Greenough and Clearwater. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4687 11359 4705 11358 4709 11327 4682 11328 TIME...MOT...LOC 2321Z 271DEG 5KT 4696 11348 $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 1:45 PM MDT | Red Flag Warning | MSO | Beaverhead, Deer Lodge, Granite, Jefferson, Madison, Powell and 1 more | 30 hr |
| Jul 1, 3:42 PM MDT | Special Weather Statement | MSO | 48 min | |
| Jul 1, 5:16 PM MDT | Special Weather Statement | MSO | Granite | 44 min |
| Jul 1, 5:23 PM MDT | Special Weather Statement | MSO | Powell | 37 min |
| Jul 1, 5:42 PM MDT | Special Weather Statement | MSO | Missoula | 48 min |
| Jul 1, 5:56 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 34 min |
| Jun 30, 7:12 PM MDT | Special Weather Statement | MSO | Adams | 18 min |
| Jul 1, 12:37 AM MDT | Special Weather Statement | MSO | Clearwater | 23 min |
| Jul 1, 5:41 PM MDT | Special Weather Statement | MSO | Lewis | 49 min |
Nearby
Special Weather Statements in Montana, 2021Every special weather statement in 2021
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.