Alert archive / Idaho / Tornado Warnings in 2014

Tornado Warning 9, NWS Pocatello, ID

September 18, 2014Cassia County, Oneida County, Power County, Idaho

NWS Pocatello, ID issued this tornado warning at Sep 18, 2014, 2:42 PM MDT for Cassia County, Oneida County, Power County, Idaho. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 18, 2014, 2:42 PM MDT (20:42 UTC)
Expired: Sep 18, 2014, 3:30 PM MDT
In force: 48 min
Issued by: NWS Pocatello, ID
Area: Storm-based polygon

Counties Cassia County, ID, Oneida County, ID, Power County, ID

The radar

The Pocatello radar (KSFX), 82 km from the middle of the area, began a volume at 20:45 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.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 8.7 hours before the alert went out and 186 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: 17 J/kg
Mixed-layer CIN: -248 J/kg
Mixed-layer LCL: 2714 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 50 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.

058 
WFUS55 KPIH 182042
TORPIH
IDC031-071-077-182130-
/O.NEW.KPIH.TO.W.0009.140918T2042Z-140918T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE POCATELLO ID
242 PM MDT THU SEP 18 2014

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL CASSIA COUNTY IN SOUTH CENTRAL IDAHO...
  NORTHWESTERN ONEIDA COUNTY IN SOUTHEAST IDAHO...
  SOUTHEASTERN POWER COUNTY IN SOUTHEAST IDAHO...

* UNTIL 330 PM MDT

* AT 238 PM MDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER EXTREME EAST
  CENTRAL CASSIA COUNTY...OR 23 MILES NORTHWEST OF SNOWVILLE...MOVING
  NORTHEAST AT 40 MPH.

* LOCATIONS THAT COULD BE AFFECTED INCLUDE...
  ROY...
  INTERSTATE 84 AT SWEETZER SUMMIT...
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT USE HIGHWAY OVERPASSES FOR SHELTER. OVERPASSES DO NOT PROVIDE
PROTECTION FROM TORNADIC WINDS. VEHICLES STOPPED UNDER BRIDGES BLOCK
TRAFFIC AND PREVENT PEOPLE FROM GETTING OUT OF THE STORM'S PATH AND
TO SHELTER. IF YOU CANNOT DRIVE AWAY FROM THE TORNADO...GET OUT OF 
YOUR VEHICLE AND LIE FLAT IN A DITCH AS A LAST RESORT.

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.

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 4211 11303 4223 11313 4259 11246 4253 11241
      4251 11242 4250 11239 4239 11230 4237 11230
TIME...MOT...LOC 2040Z 240DEG 33KT 4222 11300

$$

JKEYES

3 follow-up statements

446 
WWUS55 KPIH 182056
SVSPIH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
256 PM MDT THU SEP 18 2014

IDC031-182106-
/O.CAN.KPIH.TO.W.0009.000000T0000Z-140918T2130Z/
CASSIA ID-
256 PM MDT THU SEP 18 2014

...THE TORNADO WARNING FOR EAST CENTRAL CASSIA COUNTY IS CANCELLED...

AT 256 PM MDT...WEATHER SERVICE RADAR INDICATED THAT THE 
THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA. 
THEREFORE THE WARNING IS CANCELLED.

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 4228 11301 4232 11298 4259 11246 4253 11241
      4251 11242 4250 11239 4243 11234 4219 11292
TIME...MOT...LOC 2056Z 234DEG 32KT 4231 11285

$$

IDC071-077-182130-
/O.CON.KPIH.TO.W.0009.000000T0000Z-140918T2130Z/
ONEIDA ID-POWER ID-
256 PM MDT THU SEP 18 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM MDT FOR
SOUTHEASTERN POWER AND NORTHWESTERN ONEIDA COUNTIES...

AT 253 PM MDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE
A TORNADO.  THIS TORNADO WAS LOCATED OVER WEST CENTRAL ONEIDA
COUNTY...OR 24 MILES NORTH OF SNOWVILLE...MOVING NORTHEAST AT 35 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM MAY PRODUCE QUARTER SIZE 
HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

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.

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 4228 11301 4232 11298 4259 11246 4253 11241
      4251 11242 4250 11239 4243 11234 4219 11292
TIME...MOT...LOC 2056Z 234DEG 32KT 4231 11285

$$

JKEYES

983 
WWUS55 KPIH 182111
SVSPIH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
311 PM MDT THU SEP 18 2014

IDC071-077-182130-
/O.CON.KPIH.TO.W.0009.000000T0000Z-140918T2130Z/
ONEIDA ID-POWER ID-
311 PM MDT THU SEP 18 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 330 PM MDT FOR
SOUTHEASTERN POWER AND NORTHWESTERN ONEIDA COUNTIES...

AT 305 PM MDT...NATIONAL WEATHER SERVICE RADAR CONTINUED TO INDICATE
A TORNADO.  THIS TORNADO WAS LOCATED OVER EXTREME SOUTH CENTRAL POWER
COUNTY...OR JUST EAST OF ROY...MOVING NORTHEAST AT 35 MPH.

* LOCATIONS THAT COULD BE AFFECTED INCLUDE...
  ARBON VALLEY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM MAY PRODUCE QUARTER
SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

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.

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 4228 11301 4232 11298 4259 11246 4253 11241
      4251 11242 4250 11239 4243 11234 4219 11292
TIME...MOT...LOC 2110Z 234DEG 32KT 4238 11271

$$

JKEYES

596 
WWUS55 KPIH 182127
SVSPIH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
327 PM MDT THU SEP 18 2014

IDC071-077-182137-
/O.EXP.KPIH.TO.W.0009.000000T0000Z-140918T2130Z/
ONEIDA ID-POWER ID-
327 PM MDT THU SEP 18 2014

...THE TORNADO WARNING FOR SOUTHEASTERN POWER AND NORTHWESTERN ONEIDA
COUNTIES WILL EXPIRE AT 330 PM MDT...

AT 327 PM MDT...WEATHER SERVICE RADAR INDICATED THAT THE 
THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED...THEREFORE THE 
WARNING HAS BEEN ALLOWED TO EXPIRE.  SMALL HAIL...HEAVY RAIN AND 
GUSTY WINDS ARE STILL POSSIBLE WITH STORMS IN THE AREA.  

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 4228 11301 4232 11298 4259 11246 4253 11241
      4251 11242 4250 11239 4243 11234 4219 11292
TIME...MOT...LOC 2127Z 234DEG 32KT 4247 11254

$$

JKEYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 18, 1:07 PM MDT	Special Weather Statement	PIH	Caribou	53 min
Sep 18, 1:24 PM MDT	Severe Thunderstorm Warning	PIH	Bannock, Bingham, Bonneville, Caribou	36 min
Sep 18, 1:34 PM MDT	Special Weather Statement	PIH	Butte	56 min
Sep 18, 1:54 PM MDT	Special Weather Statement	PIH	Cassia	66 min
Sep 18, 1:56 PM MDT	Severe Thunderstorm Warning	PIH	Bingham, Bonneville, Caribou	49 min
Sep 18, 2:17 PM MDT	Special Weather Statement	PIH	Jefferson	58 min
Sep 18, 2:17 PM MDT	Severe Thunderstorm Warning	PIH	Cassia, Oneida, Power	43 min
Sep 18, 2:20 PM MDT	Special Weather Statement	PIH	Bonneville	55 min
Sep 18, 2:25 PM MDT	Special Weather Statement	PIH	Teton	50 min
Sep 18, 2:31 PM MDT	Special Weather Statement	PIH	Caribou	59 min
Sep 18, 3:26 PM MDT	Severe Thunderstorm Warning	PIH	Cassia, Oneida, Power	41 min
Sep 18, 3:38 PM MDT	Severe Thunderstorm Warning	PIH	Bannock, Oneida, Power	52 min
Sep 18, 4:11 PM MDT	Special Weather Statement	PIH	Oneida	49 min
Sep 18, 4:15 PM MDT	Severe Thunderstorm Warning	PIH	Bannock, Caribou	45 min
Sep 18, 4:27 PM MDT	Special Weather Statement	PIH	Bonneville	48 min
Sep 18, 4:35 PM MDT	Severe Thunderstorm Warning	PIH	Bannock, Franklin, Oneida, Power	40 min
Sep 18, 5:13 PM MDT	Severe Thunderstorm Warning	PIH	Bannock, Caribou, Oneida	19 min
Sep 18, 5:43 PM MDT	Special Weather Statement	PIH	Oneida	47 min

Nearby

Tornado Warnings in Idaho, 2014 Every tornado warning in 2014 Tornadoes in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.