Alert archive / Idaho / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 14, NWS Pocatello, ID

August 5, 20217 counties in Idaho

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

TimeReportWhereRemark
Aug 5, 6:45 PM MDTTSTM WND GST 5412 Nnw Atomic City, IDMESONET STATION GRI - INL INTEC/GRID 3.
Aug 5, 6:45 PM MDTTSTM WND GST 646 Nw Atomic City, IDITD RWIS STATION AT THE INL PUZZLE/US-20.
Aug 5, 6:45 PM MDTTSTM WND GST 6912 Nw Atomic City, IDMESONET 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.

Skew-T log-pSkew-T log-p diagram, Boise Airport, ID at 00:00Z on 2021-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 484 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Boise Airport, ID at 00:00Z on 2021-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

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
 
$$

KSmith
2 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
 
$$

KSmith
472 
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 

$$

KSmith

The office that day

Everything else NWS Pocatello, ID issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 5, 6:01 PM MDTSpecial Weather StatementPIHBingham44 min
Aug 5, 6:03 PM MDTSpecial Weather StatementPIHTwin Falls27 min
Aug 5, 6:13 PM MDTSpecial Weather StatementPIHCuster47 min
Aug 5, 6:19 PM MDTSpecial Weather StatementPIHButte41 min
Aug 5, 7:13 PM MDTSpecial Weather StatementPIHJefferson47 min
Aug 5, 7:52 PM MDTSpecial Weather StatementPIHClark, Fremont38 min
Aug 5, 8:47 PM MDTSpecial Weather StatementPIHJefferson28 min
Aug 6, 2:09 AM MDTSpecial Weather StatementPIHPower51 min
Aug 6, 7:33 AM MDTSpecial Weather StatementPIHBingham27 min
Aug 6, 8:11 AM MDTSpecial Weather StatementPIHBear Lake, Franklin49 min
Aug 6, 10:16 AM MDTSpecial Weather StatementPIHCamas44 min
Aug 6, 11:27 AM MDTSpecial Weather StatementPIHCuster48 min
Aug 6, 12:24 PM MDTSpecial Weather StatementPIHBlaine66 min
Aug 6, 2:17 PM MDTSpecial Weather StatementPIHButte43 min
Aug 6, 2:20 PM MDTSpecial Weather StatementPIHBonneville, Jefferson, Madison, Teton40 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.