Alert archive / Idaho / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 14, NWS Pocatello, ID
NWS Pocatello, ID issued this severe thunderstorm warning at Aug 5, 2021, 6:38 PM MDT for 7 counties in Idaho. It was in force for 37 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
- Aug 5, 2021, 6:38 PM MDT (00:38 UTC)
- Expired
- Aug 5, 2021, 7:15 PM MDT
- In force
- 37 min
- Issued by
- NWS Pocatello, ID
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Bannock County, ID, Bingham County, ID, Bonneville County, ID, Butte County, ID, Clark County, ID, Custer County, ID, Jefferson County, ID
The radar
The Pocatello radar (KSFX), 58 km from the middle of the area, began a volume at 00:37 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 |
|---|---|---|---|
| Aug 5, 6:45 PM MDT | TSTM WND GST 54 | 12 Nnw Atomic City, ID | MESONET STATION GRI - INL INTEC/GRID 3. |
| Aug 5, 6:45 PM MDT | TSTM WND GST 64 | 6 Nw Atomic City, ID | ITD RWIS STATION AT THE INL PUZZLE/US-20. |
| Aug 5, 6:45 PM MDT | TSTM WND GST 69 | 12 Nw Atomic City, ID | MESONET STATION TRA - INL REACTOR TECHNOLOGIES COMPLEX. |
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 00:00Z, 0.6 hours before the alert went out and 273 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
- 484 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 3441 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted.
479
WUUS55 KPIH 060038
SVRPIH
IDC005-011-019-023-033-037-051-060115-
/O.NEW.KPIH.SV.W.0014.210806T0038Z-210806T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pocatello ID
638 PM MDT Thu Aug 5 2021
The National Weather Service in Pocatello has issued a
* Severe Thunderstorm Warning for...
Southeastern Custer County in central Idaho...
Southwestern Jefferson County in southeastern Idaho...
North central Bannock County in southeastern Idaho...
Butte County in southeastern Idaho...
Northwestern Bonneville County in southeastern Idaho...
Southwestern Clark County in southeastern Idaho...
Bingham County in southeastern Idaho...
* Until 715 PM MDT.
* At 637 PM MDT, severe thunderstorms were located along a line
extending from near Darlington to near Southeast Inl to Fort Hall
Putnam Lodge, moving northeast at 30 MPH.
HAZARD...60 mph wind gusts. Multiple wind gusts of 55 to 65 MPH
have been recorded along this line.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Idaho Falls, Blackfoot, Arco, Terreton, Goshen, Ammon, Shelley,
Firth, Mud Lake, Atomic City, Rose, Darlington, Southeast Inl,
Southwest Inl, Pingree, Fort Hall Putnam Lodge, Fort Hall Buffalo
Lodge, Fort Hall Eagle Lodge, Fort Hall Lincoln Creek Lodge and
Central Inl.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4413 11329 4389 11236 4331 11174 4291 11238
4338 11301 4361 11356
TIME...MOT...LOC 0037Z 208DEG 25KT 4375 11336 4354 11268 4304 11227
HAIL...<.75IN
WIND...60MPH
$$
KSmith2 follow-up statements
045
WWUS55 KPIH 060056
SVSPIH
Severe Weather Statement
National Weather Service Pocatello ID
656 PM MDT Thu Aug 5 2021
IDC005-060103-
/O.CAN.KPIH.SV.W.0014.000000T0000Z-210806T0115Z/
Bannock ID-
656 PM MDT Thu Aug 5 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BANNOCK COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
If you observed wind damage, please report your observations to the
National Weather Service in Pocatello via phone at 208-233-0834, or
via social media.
LAT...LON 4413 11329 4389 11236 4331 11174 4304 11217
4344 11295 4373 11344
TIME...MOT...LOC 0053Z 213DEG 33KT 4387 11330 4364 11259 4312 11211
$$
IDC011-019-023-033-037-051-060115-
/O.CON.KPIH.SV.W.0014.000000T0000Z-210806T0115Z/
Custer ID-Jefferson ID-Butte ID-Bonneville ID-Clark ID-Bingham ID-
656 PM MDT Thu Aug 5 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM MDT
FOR SOUTHEASTERN CUSTER...SOUTHWESTERN JEFFERSON...EASTERN BUTTE...
NORTHWESTERN BONNEVILLE...SOUTHWESTERN CLARK AND CENTRAL BINGHAM
COUNTIES...
At 653 PM MDT, severe thunderstorms were located along a line
extending from 7 miles northeast of Darlington to near Southeast
Idaho National Laboratory to 6 miles southeast of Fort Hall Lincoln
Creek Lodge, moving northeast at 40 MPH.
HAZARD...55 to 65 MPH wind gusts. Multiple wind gusts of 55 to 65
MPH have been recorded from Arco across the Idaho National
Laboratory.
SOURCE...Surface weather stations.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Idaho Falls, Blackfoot, Terreton, Goshen, Ammon, Shelley, Firth, Mud
Lake, Atomic City, Rose, Southeast Inl, Southwest Inl, Fort Hall
Lincoln Creek Lodge, Central Inl, Taber, Northwest Inl, Moreland,
Bone, Groveland and Basalt.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
If you observe wind damage, please report your observations to the
National Weather Service in Pocatello via phone at 208-233-0834, or
via social media.
&&
LAT...LON 4413 11329 4389 11236 4331 11174 4304 11217
4344 11295 4373 11344
TIME...MOT...LOC 0053Z 213DEG 33KT 4387 11330 4364 11259 4312 11211
HAIL...<.75IN
WIND...60MPH
$$
KSmith472
WWUS55 KPIH 060115
SVSPIH
Severe Weather Statement
National Weather Service Pocatello ID
715 PM MDT Thu Aug 5 2021
IDC011-019-023-033-037-051-060124-
/O.EXP.KPIH.SV.W.0014.000000T0000Z-210806T0115Z/
Custer ID-Jefferson ID-Butte ID-Bonneville ID-Clark ID-Bingham ID-
715 PM MDT Thu Aug 5 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CUSTER...
SOUTHWESTERN JEFFERSON...EASTERN BUTTE...NORTHWESTERN BONNEVILLE...
SOUTHWESTERN CLARK AND CENTRAL BINGHAM COUNTIES WILL EXPIRE AT 715 PM
MDT...
The storms which prompted the warning have weakened below severe
limits, and a. Therefore, the warning will be allowed to expire. re
moving northeast out of the warned area. However gusty winds are
still possible with these thunderstorms, especially over Idaho
National Laboratory and Howe.
If you observed severe weather including wind damage, please report
your observations to the National Weather Service in Pocatello via
phone at 208-233-0834, or via social media.
LAT...LON 4413 11329 4389 11236 4331 11174 4304 11217
4344 11295 4373 11344
TIME...MOT...LOC 0114Z 208DEG 25KT 4399 11321 4376 11250 4324 11202
$$
KSmithThe office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 6:01 PM MDT | Special Weather Statement | PIH | Bingham | 44 min |
| Aug 5, 6:03 PM MDT | Special Weather Statement | PIH | Twin Falls | 27 min |
| Aug 5, 6:13 PM MDT | Special Weather Statement | PIH | Custer | 47 min |
| Aug 5, 6:19 PM MDT | Special Weather Statement | PIH | Butte | 41 min |
| Aug 5, 7:13 PM MDT | Special Weather Statement | PIH | Jefferson | 47 min |
| Aug 5, 7:52 PM MDT | Special Weather Statement | PIH | Clark, Fremont | 38 min |
| Aug 5, 8:47 PM MDT | Special Weather Statement | PIH | Jefferson | 28 min |
| Aug 6, 2:09 AM MDT | Special Weather Statement | PIH | Power | 51 min |
| Aug 6, 7:33 AM MDT | Special Weather Statement | PIH | Bingham | 27 min |
| Aug 6, 8:11 AM MDT | Special Weather Statement | PIH | Bear Lake, Franklin | 49 min |
| Aug 6, 10:16 AM MDT | Special Weather Statement | PIH | Camas | 44 min |
| Aug 6, 11:27 AM MDT | Special Weather Statement | PIH | Custer | 48 min |
| Aug 6, 12:24 PM MDT | Special Weather Statement | PIH | Blaine | 66 min |
| Aug 6, 2:17 PM MDT | Special Weather Statement | PIH | Butte | 43 min |
| Aug 6, 2:20 PM MDT | Special Weather Statement | PIH | Bonneville, Jefferson, Madison, Teton | 40 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.