Alert archive / Montana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 1, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 1, 2021, 5:56 PM MDT for Missoula County, Montana. It was in force for 34 min. 5 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
- Jul 1, 2021, 5:56 PM MDT (23:56 UTC)
- Expired
- Jul 1, 2021, 6:30 PM MDT
- In force
- 34 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Missoula County, MT
The radar
The Missoula radar (KMSX), 24 km from the middle of the area, began a volume at 23:55 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 |
|---|---|---|---|
| Jul 1, 5:56 PM MDT | TSTM WND GST 64 | 6 Wnw Missoula, MT | CORRECTS PREVIOUS REPORT OF 64 MPH WIND GUST MEASURED AT KMSO ASOS WITH WIND OBSERVATION TIME OF 556 PM MDT. |
| Jul 1, 6:00 PM MDT | TSTM WND DMG | 1 Sw Missoula, MT | BROADCAST MEDIA REPORTS DOWNED POWER LINES AND ROOF DAMAGE NEAR BICKFORD STREET AND RONAN STREET. TIME OF REPORT ESTIMATED. |
| Jul 1, 6:00 PM MDT | TSTM WND DMG | 2 Ssw Missoula, MT | NWS EMPLOYEE REPORTS DOWNED POWERLINES ON KENT AVE. A 10 TO 12 INCH DIAMETER, 40 FOOT PINE TREE WAS SNAPPED HALFWAY UP. TIME OF DAMAGE ESTIMATED. |
| Jul 1, 6:05 PM MDT | TSTM WND DMG | 5 Wnw Missoula, MT | PHOTOS OF THREE DOWNED TREES ALONG MULLAN TRAIL ROAD IN MISSOULA. |
| Jul 1, 6:15 PM MDT | TSTM WND DMG | 6 Wnw Missoula, MT | A 8-12 INCH DIAMETER TREE BRANCH WAS DOWNED ALONG MULLAN ROAD IN MISSOULA. REPORT RETRIEVED VIA SOCIAL MEDIA. TIME OF DAMAGE ESTIMATED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 11.9 hours before the alert went out and 201 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
- 3123 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
958 WUUS55 KMSO 012356 SVRMSO MTC063-020030- /O.NEW.KMSO.SV.W.0001.210701T2356Z-210702T0030Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Missoula MT 556 PM MDT Thu Jul 1 2021 The National Weather Service in Missoula has issued a * Severe Thunderstorm Warning for... South central Missoula County in west central Montana... * Until 630 PM MDT. * At 555 PM MDT, a severe thunderstorm was located over Lolo, or near Missoula, moving north at 10 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Missoula, Lolo and Wye. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4676 11392 4670 11417 4692 11436 4701 11399 TIME...MOT...LOC 2355Z 159DEG 10KT 4680 11409 HAIL...<.75IN WIND...60MPH $$
2 follow-up statements
668 WWUS55 KMSO 020008 SVSMSO Severe Weather Statement National Weather Service Missoula MT 608 PM MDT Thu Jul 1 2021 MTC063-020030- /O.CON.KMSO.SV.W.0001.000000T0000Z-210702T0030Z/ Missoula MT- 608 PM MDT Thu Jul 1 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM MDT FOR SOUTH CENTRAL MISSOULA COUNTY... At 608 PM MDT, a severe thunderstorm was located over Lolo, or near Missoula, moving northwest at 10 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Missoula, Lolo and Wye. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4680 11400 4677 11415 4692 11436 4701 11399 TIME...MOT...LOC 0008Z 156DEG 8KT 4682 11410 HAIL...<.75IN WIND...60MPH $$
937
WWUS55 KMSO 020029
SVSMSO
Severe Weather Statement
National Weather Service Missoula MT
629 PM MDT Thu Jul 1 2021
MTC063-020039-
/O.EXP.KMSO.SV.W.0001.000000T0000Z-210702T0030Z/
Missoula MT-
629 PM MDT Thu Jul 1 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MISSOULA COUNTY
WILL EXPIRE AT 630 PM MDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
LAT...LON 4680 11400 4677 11415 4692 11436 4701 11399
TIME...MOT...LOC 0029Z 159DEG 10KT 4687 11413
$$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, 5:21 PM MDT | Special Weather Statement | MSO | Missoula | 24 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 |
Nearby
Severe Thunderstorm Warnings in Montana, 2021Every severe thunderstorm warning 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.