Alert archive / Montana / Special Weather Statements in 2021
Special Weather Statement, NWS Missoula, MT
NWS Missoula, MT issued this special weather statement at Jun 13, 2021, 7:21 PM MDT for Missoula County, Montana. It was in force for 39 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 13, 2021, 7:21 PM MDT (01:21 UTC)
- Expired
- Jun 13, 2021, 8:00 PM MDT
- In force
- 39 min
- Issued by
- NWS Missoula, MT
County Missoula County, MT
The radar
The Missoula radar (KMSX), 42 km from the middle of the area, began a volume at 01:21 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 13, 7:30 PM MDT | TSTM WND DMG | 2 E Seeley Lake, MT | REPORTED 60 FOOT PONDEROSA PINE FELL ONTO SHOP. 2 FEET IN DIAMETER. SECTION JACK FENCES WERE TIPPED OVER. |
| Jun 13, 7:30 PM MDT | TSTM WND DMG | 4 Nnw Clearwater, MT | ROCKS AND TREE BLOCKING NORTH BOUND LANE OF HIGHWAY 83, 4 MILES NORTH OF HIGHWAY 200. |
| Jun 13, 7:30 PM MDT | TSTM WND DMG | 5 Sse Seeley Lake, MT | LARGE TREE BLOCKING NORTH BOUND LANE OF HIGHWAY 83, 9 MILES NORTH OF HIGHWAY 200. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 1.4 hours before the alert went out and 219 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
- 253 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 3063 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
The text
As transmitted.
444
WWUS85 KMSO 140121
SPSMSO
Special Weather Statement
National Weather Service Missoula MT
721 PM MDT Sun Jun 13 2021
MTZ043-140200-
Potomac/Seeley Lake Region MT-
721 PM MDT Sun Jun 13 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MISSOULA AND
NORTHWESTERN POWELL COUNTIES UNTIL 800 PM MDT...
At 721 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles southeast of Evaro to 10 miles west of
Ovando. Movement was north at 20 mph.
Pea size hail and winds in excess of 40 mph will be possible with
these storms.
Locations impacted include...
Seeley Lake and Clearwater.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Persons in campgrounds should consider seeking sturdy shelter until
these storms pass.
&&
LAT...LON 4738 11308 4716 11336 4695 11338 4697 11387
4716 11381 4739 11380
TIME...MOT...LOC 0121Z 188DEG 19KT 4701 11393 4699 11339
$$The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 6:07 PM MDT | Special Weather Statement | MSO | Granite | 23 min |
| Jun 13, 6:13 PM MDT | Special Weather Statement | MSO | Powell | 47 min |
| Jun 13, 6:33 PM MDT | Special Weather Statement | MSO | Powell | 27 min |
| Jun 13, 7:12 PM MDT | Special Weather Statement | MSO | Powell | 33 min |
| Jun 14, 12:00 PM MDT | Red Flag Warning | MSO | Beaverhead, Deer Lodge, Granite, Jefferson, Madison, Powell and 1 more | 36 hr |
| Jun 13, 8:32 PM MDT | Special Weather Statement | MSO | Idaho | 13 min |
| Jun 13, 8:47 PM MDT | Special Weather Statement | MSO | Clearwater | 13 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.