Alert archive / Idaho / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 2, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 7, 2021, 1:30 PM MDT for Lemhi County, Idaho. It was in force for 30 min. 4 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 7, 2021, 1:30 PM MDT (19:30 UTC)
- Expired
- Jul 7, 2021, 2:00 PM MDT
- In force
- 30 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Lemhi County, ID
The radar
The Pocatello radar (KSFX), 215 km from the middle of the area, began a volume at 19:29 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 7, 1:36 PM MDT | TSTM WND GST 50 | 2 Nne Leadore, ID | MESONET STATION LDOI1 LEADORE. |
| Jul 7, 1:50 PM MDT | TSTM WND GST 51 | 5 Nne Williams Lake, ID | ELEVATION 4,331 FT. |
| Jul 7, 1:56 PM MDT | TSTM WND GST 48 | 4 Sse Salmon, ID | AWOS STATION KSMN SALMON AWOS. |
| Jul 7, 2:00 PM MDT | TSTM WND GST 53 | 1 W Salmon, ID | MESONET STATION FW1222 SALMON. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Boise Airport, ID (KBOI), launched 12:00Z, 7.5 hours before the alert went out and 260 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
- -343 J/kg
- Mixed-layer LCL
- 3630 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
522
WUUS55 KMSO 071930
SVRMSO
IDC059-072000-
/O.NEW.KMSO.SV.W.0002.210707T1930Z-210707T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Missoula MT
130 PM MDT Wed Jul 7 2021
The National Weather Service in Missoula has issued a
* Severe Thunderstorm Warning for...
Central Lemhi County in east central Idaho...
* Until 200 PM MDT.
* At 129 PM MDT, severe thunderstorms were located along a line
extending from 22 miles southwest of Salmon to near Leadore, moving
north at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Salmon, Lemhi, Leadore, Carmen, Williams Lake, Baker and Tendoy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4490 11423 4529 11403 4514 11357 4511 11355
4511 11352 4509 11352 4506 11345 4496 11344
4494 11350 4487 11345 4484 11342 4484 11338
4482 11335 4479 11335 4482 11326 4481 11321
4460 11338
TIME...MOT...LOC 1929Z 195DEG 26KT 4490 11413 4468 11342
HAIL...<.75IN
WIND...60MPH
$$3 follow-up statements
432
WWUS55 KMSO 071943
SVSMSO
Severe Weather Statement
National Weather Service Missoula MT
143 PM MDT Wed Jul 7 2021
IDC059-072000-
/O.CON.KMSO.SV.W.0002.000000T0000Z-210707T2000Z/
Lemhi ID-
143 PM MDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM MDT
FOR CENTRAL LEMHI COUNTY...
At 143 PM MDT, severe thunderstorms were located along a line
extending from 18 miles southwest of Salmon to near Leadore, moving
north at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Salmon, Lemhi, Leadore, Carmen, Williams Lake, Baker and Tendoy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4493 11413 4529 11403 4514 11357 4511 11355
4511 11352 4509 11352 4506 11345 4496 11344
4494 11350 4487 11345 4484 11342 4484 11338
4482 11335 4479 11335 4482 11326 4481 11321
4464 11335
TIME...MOT...LOC 1943Z 195DEG 26KT 4496 11411 4474 11340
HAIL...<.75IN
WIND...60MPH
$$130
WWUS55 KMSO 071951
SVSMSO
Severe Weather Statement
National Weather Service Missoula MT
151 PM MDT Wed Jul 7 2021
IDC059-072000-
/O.CON.KMSO.SV.W.0002.000000T0000Z-210707T2000Z/
Lemhi ID-
151 PM MDT Wed Jul 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM MDT
FOR CENTRAL LEMHI COUNTY...
At 151 PM MDT, severe thunderstorms were located along a line
extending from 13 miles southwest of Salmon to 9 miles north of
Leadore, moving north at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Salmon, Tendoy, Carmen and Baker.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4507 11400 4529 11403 4514 11357 4511 11355
4511 11352 4509 11352 4506 11345 4496 11344
4494 11350 4487 11345 4484 11342 4484 11338
4482 11335 4479 11335 4482 11326 4481 11321
4470 11330 4492 11368
TIME...MOT...LOC 1951Z 195DEG 26KT 4504 11408 4482 11337
HAIL...<.75IN
WIND...60MPH
$$503
WWUS55 KMSO 071955
SVSMSO
Severe Weather Statement
National Weather Service Missoula MT
155 PM MDT Wed Jul 7 2021
IDC059-072005-
/O.EXP.KMSO.SV.W.0002.000000T0000Z-210707T2000Z/
Lemhi ID-
155 PM MDT Wed Jul 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LEMHI COUNTY WILL
EXPIRE AT 200 PM MDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with these thunderstorms.
LAT...LON 4507 11400 4529 11403 4514 11357 4511 11355
4511 11352 4509 11352 4506 11345 4496 11344
4494 11350 4487 11345 4484 11342 4484 11338
4482 11335 4479 11335 4482 11326 4481 11321
4470 11330 4492 11368
TIME...MOT...LOC 1955Z 195DEG 26KT 4506 11407 4484 11336
$$The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 1:19 PM MDT | Special Weather Statement | MSO | Lemhi | 26 min |
Nearby
Severe Thunderstorm Warnings in Idaho, 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.