Alert archive / Idaho / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Pocatello, ID

August 1, 2011Bingham County, Butte County, Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at Aug 1, 2011, 4:56 PM MDT for Bingham County, Butte County, Idaho. It was in force for 35 min. 6 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 1, 2011, 4:56 PM MDT (22:56 UTC)
Expired
Aug 1, 2011, 5:31 PM MDT
In force
35 min
Issued by
NWS Pocatello, ID
Area
Storm-based polygon

Counties Bingham County, ID, Butte County, ID

The radar

The Pocatello radar (KSFX), 51 km from the middle of the area, began a volume at 22:56 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 1, 5:07 PM MDTTSTM WND GST 616 Wnw Central Inl, ID61 MILE AN HOUR WIND GUST AT INL CENTRL FACILITY.
Aug 1, 5:10 PM MDTTSTM WND GST 584 Sw Central Inl, IDLOST RIVER REST AREA.
Aug 1, 5:15 PM MDTTSTM WND GST 6512 Nw Atomic City, IDINL REACTOR TECH SITE.
Aug 1, 5:15 PM MDTTSTM WND GST 661 Wsw Central Inl, IDCENTRAL INL FACILITY WIND SENSOR.
Aug 1, 5:20 PM MDTTSTM WND GST 67Nne Central Inl, IDCENTRAL INL FACILITY WEATHER INSTRUMENT MEASURED GUST TO 67 MILES AN HOUR.
Aug 1, 5:25 PM MDTTSTM WND GST 705 Se Central Inl, ID70 MILE AN HOUR WIND GUST AT CRITICAL INFRASTUCTURE COMPLEX INL.

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, 10.9 hours before the alert went out and 268 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 12:00Z on 2011-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 237 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 12:00Z on 2011-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 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
237 J/kg
Mixed-layer CIN
-137 J/kg
Mixed-layer LCL
1719 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

042 
WUUS55 KPIH 012256
SVRPIH
IDC011-023-012345-
/O.NEW.KPIH.SV.W.0039.110801T2256Z-110801T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE POCATELLO
456 PM MDT MON AUG 1 2011

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL BUTTE COUNTY IN EAST CENTRAL IDAHO...
  THIS INCLUDES THE CITIES OF...SOUTHWEST INL...CENTRAL INL...
  NORTHWESTERN BINGHAM COUNTY IN SOUTHEAST IDAHO...
  THIS INCLUDES THE CITY OF SOUTHEAST INL...

* UNTIL 545 PM MDT

* AT 448 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 11 MILES WEST OF SOUTHWEST INL...OR 6 MILES
  SOUTHEAST OF ARCO...AND MOVING EAST AT 25 MPH.

* LOCATIONS THAT COULD BE AFFECTED INCLUDE...
   SOUTHWEST INL...
   CENTRAL INL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

STAY TUNED TO THIS BROADCAST FOR THE LATEST UPDATES AND INFORMATION.
TO REPORT SEVERE WEATHER ONLY...CALL 1 800 8 7 7 1 9 3 7.

&&

LAT...LON 4359 11257 4335 11268 4352 11330 4369 11322
TIME...MOT...LOC 2255Z 289DEG 21KT 4357 11314

$$

HUSTON
2 follow-up statements
918 
WWUS55 KPIH 012317
SVSPIH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO
517 PM MDT MON AUG 1 2011

IDC011-023-012345-
/O.CON.KPIH.SV.W.0039.000000T0000Z-110801T2345Z/
BINGHAM ID-BUTTE ID-
517 PM MDT MON AUG 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MDT
FOR CENTRAL BUTTE AND NORTHWESTERN BINGHAM COUNTIES...

AT 512 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR SOUTHWEST INL...MOVING
EAST AT 25 MPH.

* LOCATIONS THAT COULD BE AFFECTED INCLUDE...
   ATOMIC CITY...CENTRAL INL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

STAY TUNED TO THIS BROADCAST FOR THE LATEST UPDATES AND INFORMATION.
TO REPORT SEVERE WEATHER ONLY...CALL 1 800 8 7 7 1 9 3 7.

&&

LAT...LON 4359 11257 4335 11268 4352 11330 4369 11322
TIME...MOT...LOC 2317Z 289DEG 21KT 4351 11298

$$

HUSTON
926 
WWUS55 KPIH 012331
SVSPIH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO
531 PM MDT MON AUG 1 2011

IDC011-023-012341-
/O.CAN.KPIH.SV.W.0039.000000T0000Z-110801T2345Z/
BINGHAM ID-BUTTE ID-
531 PM MDT MON AUG 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BUTTE AND NORTHWESTERN
BINGHAM COUNTIES IS CANCELLED...

AT 531 PM MDT...WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE 
THUNDERSTORMS WHICH PROMPTED THE WARNING HAD MOVED SOUTHEAST OF THE 
WARNED AREA. THEREFORE THE WARNING IS CANCELLED.

* LOCATIONS THAT COULD BE AFFECTED INCLUDE...
   ATOMIC CITY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STAY TUNED TO THIS BROADCAST FOR THE LATEST UPDATES AND INFORMATION.
TO REPORT SEVERE WEATHER ONLY...CALL 1 800 8 7 7 1 9 3 7.

&&

LAT...LON 4359 11257 4335 11268 4352 11330 4369 11322
TIME...MOT...LOC 2331Z 289DEG 21KT 4346 11288

$$

HUSTON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 7:31 PM MDTSpecial Weather StatementPIHBear Lake, Franklin89 min
Jul 31, 8:49 PM MDTSpecial Weather StatementPIHBear Lake, Franklin56 min
Jul 31, 9:55 PM MDTSpecial Weather StatementPIHBear Lake, Caribou65 min
Aug 1, 3:19 PM MDTSpecial Weather StatementPIHCamas41 min
Aug 1, 3:30 PM MDTSpecial Weather StatementPIHCuster45 min
Aug 1, 3:33 PM MDTSpecial Weather StatementPIHButte42 min
Aug 1, 3:59 PM MDTSevere Thunderstorm WarningPIHButte, Custer46 min
Aug 1, 4:38 PM MDTFlash Flood WarningPIHButte, Custer2 hr
Aug 1, 5:24 PM MDTSevere Thunderstorm WarningPIHBingham, Bonneville, Butte, Jefferson51 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2011Every severe thunderstorm warning in 2011

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.