Alert archive / Idaho / Tornado Warnings in 2011

Tornado Warning 1, NWS Pocatello, ID

June 23, 2011Bear Lake County, Franklin County, Idaho

NWS Pocatello, ID issued this tornado warning at Jun 23, 2011, 6:49 PM MDT for Bear Lake County, Franklin County, Idaho. It was in force for 26 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: Jun 23, 2011, 6:49 PM MDT (00:49 UTC)
Expired: Jun 23, 2011, 7:15 PM MDT
In force: 26 min
Issued by: NWS Pocatello, ID
Area: Storm-based polygon

Counties Bear Lake County, ID, Franklin County, ID

The radar

The Pocatello radar (KSFX), 144 km from the middle of the area, began a volume at 00:50 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
Jun 23, 7:11 PM MDT	HAIL 2	Montpelier, ID
Jun 23, 7:12 PM MDT	HAIL 1	1 N Montpelier, ID	STILL FALLING AT TIME OF OBSERVATION.
Jun 23, 7:12 PM MDT	HAIL 1.75	Wardboro, ID	SOME HAIL SLIGHTLY LARGER THAN GOLF BALL.
Jun 23, 7:15 PM MDT	FUNNEL CLOUD	1 N Montpelier, ID

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Riverton, WY (KRIW), launched 00:00Z, 0.8 hours before the alert went out and 249 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 207 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 2783 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

179 
WFUS55 KPIH 240049
TORPIH
IDC007-041-240115-
/O.NEW.KPIH.TO.W.0001.110624T0049Z-110624T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE POCATELLO
649 PM MDT THU JUN 23 2011

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL BEAR LAKE COUNTY IN SOUTHEAST IDAHO...
  THIS INCLUDES THE CITY OF MONTPELIER...
  NORTHEASTERN FRANKLIN COUNTY IN SOUTHEAST IDAHO...

* UNTIL 715 PM MDT

* AT 647 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 12 MILES WEST OF
  MONTPELIER...MOVING EAST AT 35 MPH.

* LOCATIONS THAT COULD BE AFFECTED INCLUDE...
   MONTPELIER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 4224 11160 4235 11162 4244 11104 4243 11104
      4239 11103 4222 11104
TIME...MOT...LOC 0049Z 264DEG 31KT 4230 11151

$$

HEDGES

1 follow-up statement

013 
WWUS55 KPIH 240104
SVSPIH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO
704 PM MDT THU JUN 23 2011

IDC041-240114-
/O.CAN.KPIH.TO.W.0001.000000T0000Z-110624T0115Z/
FRANKLIN ID-
704 PM MDT THU JUN 23 2011

...THE TORNADO WARNING FOR NORTHEASTERN FRANKLIN COUNTY IS
CANCELLED...

LOCATIONS AFFECTED INCLUDE....

LAT...LON 4224 11104 4226 11140 4236 11144 4244 11104
      4243 11104 4239 11103
TIME...MOT...LOC 0104Z 264DEG 31KT 4231 11134

$$

IDC007-240115-
/O.CON.KPIH.TO.W.0001.000000T0000Z-110624T0115Z/
BEAR LAKE ID-
704 PM MDT THU JUN 23 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM MDT FOR CENTRAL
BEAR LAKE COUNTY...

AT 659 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR BERN...OR NEAR
MONTPELIER...MOVING EAST AT 35 MPH.

LOCATIONS AFFECTED INCLUDE...MONTPELIER...BENNINGTON AND GENEVA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 4224 11104 4226 11140 4236 11144 4244 11104
      4243 11104 4239 11103
TIME...MOT...LOC 0104Z 264DEG 31KT 4231 11134

$$

HEDGES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 7:14 PM MDT	Tornado Warning	PIH	Bear Lake	31 min
Jun 24, 3:20 AM MDT	River Flood Warning	PIH	Fremont, Madison	16 days
Jun 24, 7:37 AM MDT	Special Weather Statement	PIH	Butte	53 min
Jun 24, 8:32 AM MDT	Special Weather Statement	PIH	Bingham	58 min
Jun 24, 9:35 AM MDT	Special Weather Statement	PIH	Madison	40 min
Jun 24, 5:39 PM MDT	Special Weather Statement	PIH	Franklin	51 min

Nearby

Tornado Warnings in Idaho, 2011 Every tornado warning in 2011 Tornadoes 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.