Alert archive / Idaho / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 35, NWS Pocatello, ID

August 14, 2014Bingham County, Bonneville County, Caribou County, Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at Aug 14, 2014, 3:47 PM MDT for Bingham County, Bonneville County, Caribou County, Idaho. It was in force for 28 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: Aug 14, 2014, 3:47 PM MDT (21:47 UTC)
Expired: Aug 14, 2014, 4:15 PM MDT
In force: 28 min
Issued by: NWS Pocatello, ID
Area: Storm-based polygon

Counties Bingham County, ID, Bonneville County, ID, Caribou County, ID

The radar

The Pocatello radar (KSFX), 98 km from the middle of the area, began a volume at 21:48 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Riverton, WY (KRIW), launched 12:00Z, 9.8 hours before the alert went out and 250 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: 7 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 1058 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 47 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.

722 
WUUS55 KPIH 142147
SVRPIH
IDC011-019-029-142215-
/O.NEW.KPIH.SV.W.0035.140814T2147Z-140814T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE POCATELLO ID
347 PM MDT THU AUG 14 2014

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME SOUTHEASTERN BINGHAM COUNTY IN SOUTHEAST IDAHO...
  SOUTH CENTRAL BONNEVILLE COUNTY IN SOUTHEAST IDAHO...
  NORTH CENTRAL CARIBOU COUNTY IN SOUTHEAST IDAHO...

* UNTIL 415 PM MDT

* AT 345 PM MDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
  THUNDERSTORM PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED
  OVER EXTREME NORTH CENTRAL CARIBOU COUNTY...OR 23 MILES NORTH OF
  SODA SPRINGS...AND MOVING NORTHEAST AT 20 MPH.

* LOCATIONS THAT COULD BE AFFECTED INCLUDE...
  BLACKFOOT RESERVOIR...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF ON OR NEAR BLACKFOOT RESERVOIR...GET OUT OF THE WATER AND MOVE 
INDOORS OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 
15 MILES FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU 
ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER 
NOW. DON'T BE CAUGHT ON THE WATER IN A THUNDERSTORM!

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 4330 11144 4308 11118 4289 11161 4300 11172
TIME...MOT...LOC 2147Z 231DEG 19KT 4300 11157

$$

VALLE

1 follow-up statement

006 
WWUS55 KPIH 142209
SVSPIH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
409 PM MDT THU AUG 14 2014

IDC011-019-029-142218-
/O.EXP.KPIH.SV.W.0035.000000T0000Z-140814T2215Z/
CARIBOU ID-BINGHAM ID-BONNEVILLE ID-
409 PM MDT THU AUG 14 2014

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL BONNEVILLE...
EXTREME SOUTHEASTERN BINGHAM AND NORTH CENTRAL CARIBOU COUNTIES WILL
EXPIRE AT 415 PM MDT...

AT 408 PM MDT...WEATHER SERVICE RADAR INDICATED THAT THE 
THUNDERSTORM WHICH PROMPTED THE WARNING NEAR THE BLACKFOOT RESERVOIR 
HAS WEAKENED. THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE. A 
SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM MDT FOR 
THUNDERSTORMS NEAR THE PALISADES RESERVOIR.

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 4330 11144 4308 11118 4289 11161 4300 11172
TIME...MOT...LOC 2208Z 231DEG 19KT 4307 11145

$$

VALLE

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pocatello, ID wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 14, 1:50 PM MDT, 1 hour 57 minutes earlier.

Area forecast discussion, Aug 14, 1:50 PM MDT, 1 hour 57 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
150 PM MDT THU AUG 14 2014

.DISCUSSION...THE PERSISTENT UPPER LOW WAS LOCATED OVER THE
COLUMBIA GORGE THIS AFTN...AND EXPECTED TO FILL AND MOVE TO NC MT
ON SATURDAY. MOST OF THE MONSOON MOISTURE HAS MOVED OFF TO THE
NORTH AND EAST...BUT ENOUGH MOISTURE LINGERS TO FUEL SHOWERS/TSTMS
OVER THE FCST AREA. GREATEST COVERAGE WILL BE IN THE EAST AND
NORTH PARTS OF THE FCST AREA. SOME TSTMS MAY PRODUCE GUSTY WINDS
AND SMALL HAIL...ESPECIALLY LATE THIS AFTN. ACTIVITY WILL DIMINISH
THIS EVENING OVER THE WESTERN PARTS AND THE SNAKE RIVER PLAIN...
BUT CONTINUE NEAR THE WY AND MT BORDERS. ON FRIDAY...DRIER AIR
BECOMES MORE DOMINANT. THIS WILL LIMIT ACTIVITY TO ONLY ISOLD
TSTMS IN THE CENTRAL MTNS AND EASTERN HIGHLANDS. BY SATURDAY...THE
UPPER LOW MOVES FAR ENOUGH AWAY TO LIMIT ACTIVITY TO ALONG THE
DIVIDE. WEAK UPPER RIDGING SETS UP FOR THE REST OF THE WEEKEND AND
PERSISTS THRU TUE. THIS WILL RESULT IN DRY CONDITIONS AND WARMER
TEMPS THRU TUE.

BY WED...THE PATTERN SHOWS SIGNS OF CHANGE. THE NORTHERN STREAM
BEGINS TO SAG SOUTHWARD INTO THE PAC NW...AND SUGGEST COOLER TEMPS
FOR WED AND THU. ALSO...THE POSSIBILITY OF SHOWERS NEAR THE
DIVIDE. HEDGES

&&

.AVIATION...UPPER LEVEL LOW IN THE PACIFIC NORTHWEST CONTINUES TO
BRING MOIST UNSTABLE AIR INTO SOUTHERN/CENTRAL IDAHO. NOT MUCH IN
THE WAY OF WIND UNLESS THUNDERSTORM OUTFLOW REACHES AIRDROME. GFS
HAD THE BETTER INSTABILITY FORECAST...AND KSUN SHOULD BE OUT OF ANY
SERIOUS THUNDERSTORM ACTIVITY. BUT KIDA AND KPIH HAVE NEGATIVE
LIFTED INDICES AND CAPE GREATER THAN 300J/KG THROUGH NEARLY 15/06Z.
SO HAVE EXTENDED VCTS FORECAST FOR THOSE TWO AIRPORTS AND INTRODUCED
ONE UNTIL 15/00Z AT KBYI...WHEN LIFTED INDEX AND CAPE ARE
NEGATIVE/ABOVE 300J/KG. SPC IS CONSIDERING A SEVERE THUNDERSTORM
WATCH WITH GOOD INVERTED-V SOUNDINGS...SO HAVE PUT IN TEMPO GROUP OF
TSRA ACTIVITY FOR MID- TO LATE AFTERNOON PERIOD AT THESE TWO
LOCATIONS. BOTH HAVE MORE THAN 40 PERCENT CHANCE OF THUNDERSTORMS IN
MOS GUIDANCE...GOOD UPPER LEVEL DIFFLUENCE...AND STABILITY
PARAMETERS ALL POINT TO INTENSE AND WIDESPREAD TSRA ACTIVITY.
CLEARING SHOULD TAKE PLACE TONIGHT AS THIS UPPER LEVEL LOW FINALLY
GETS IN PHASE WITH A MORE NORTHERN SHORTWAVE WHICH ACTS AS A KICKER
TO THE PACIFIC NORTHWEST LOW. THERE IS ALSO A POTENTIAL ROUND OF
SHRA LATE TONIGHT. ONLY IMPACT TO CIG OR VSBY WOULD BE REDUCED VSBY
IN TSRA. WINDS OUTSIDE OF TSRA CONTINUE LIGHT. MESSICK

&&

.FIRE WEATHER...CLOSED UPPER LEVEL LOW LINGERING OVER THE PACIFIC
NORTHWEST FOR ANOTHER 24 HOURS OR SO...THUS EXPECT MORE THUNDERSTORM
ACTIVITY WITH LESS INTENSE SHOWERS. STILL...A GOOD PORTION OF THE
THUNDERSTORMS WILL BRING WETTING RAINS. THE LOW...AFTER LINGERING
FOR NEARLY 9 DAYS...WILL BEGIN TO MOVE OUT AS IT GETS ABSORBED BY A
STRONG TROUGH MOVING THROUGH NORTHERN CANADA. AS IT CLEARS OUT
FRI...DRYING DEVELOPS...ALBEIT SLOW. THE UPPER LEVEL HAS A STRONGER
WESTERLY FLOW THAT WILL MEAN STRONGER WINDS THAN WE HAVE BEEN HAVING
LATELY WITH WED AND THU LOOKING MUCH STRONGER FOR WIND. SLOW DRYING
OF HUMIDITY AS TEMPERATURES WILL NOT SEE MUCH OF A WARM UP DESPITE
MAINLY CLEAR SKIES. MESSICK

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

In the hours before

Special weather statement, Aug 14, 2:12 PM MDT, 1 hour 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO ID
212 PM MDT THU AUG 14 2014

IDZ023-142100-
CARIBOU ID-BANNOCK ID-
212 PM MDT THU AUG 14 2014

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL BANNOCK COUNTY IN SOUTHEAST IDAHO
  WEST CENTRAL CARIBOU COUNTY IN SOUTHEAST IDAHO

UNTIL 300 PM MDT

AT 210 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 11 MILES SOUTHEAST OF POCATELLO..MOVING EAST AT
20 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 45 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
   INKOM...

LAT...LON 4297 11194 4274 11185 4270 11235 4281 11240
TIME...MOT...LOC 2012Z 253DEG 15KT 4277 11230

HEDGES

Local storm report, Aug 14, 2:30 PM MDT, 1 hour 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
230 PM MDT THU AUG 14 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0228 PM     HAIL             20 SE POCATELLO         42.67N 112.19W
08/14/2014  E0.25 INCH       BANNOCK            ID   DEPT OF HIGHWAYS

&&

ADESMET

Local storm report, Aug 14, 2:31 PM MDT, 1 hour 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
231 PM MDT THU AUG 14 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0230 PM     HAIL             5 N PORTNEUF GAP        42.87N 112.34W
08/14/2014  E0.25 INCH       BANNOCK            ID   TRAINED SPOTTER

&&

ADESMET

Local storm report, Aug 14, 2:46 PM MDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
246 PM MDT THU AUG 14 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0245 PM     HAIL             2 SSE INKOM             42.77N 112.23W
08/14/2014  E0.25 INCH       BANNOCK            ID   TRAINED SPOTTER

&&

ADESMET

Local storm report, Aug 14, 3:39 PM MDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
339 PM MDT THU AUG 14 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0335 PM     FLASH FLOOD      POCATELLO               42.88N 112.47W
08/14/2014                   BANNOCK            ID   COUNTY OFFICIAL

            ON I-15 BETWEEN MILE MARKER 63 AND 65 1.5 INCHES OF
            WARTER ON ROAD.

&&

ADESMET

Local storm report, Aug 14, 3:41 PM MDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
341 PM MDT THU AUG 14 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0339 PM     FLASH FLOOD      INKOM                   42.80N 112.25W
08/14/2014                   BANNOCK            ID   TRAINED SPOTTER

            STANDING WATER ON ROAD

&&

ADESMET

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 6:39 PM MDT	Areal Flood Advisory	PIH	Cassia	3 hr
Aug 13, 7:36 PM MDT	Areal Flood Advisory	PIH	Cassia, Oneida	3 hr
Aug 13, 7:41 PM MDT	Special Weather Statement	PIH	Bingham	64 min
Aug 13, 10:45 PM MDT	Special Weather Statement	PIH	Minidoka	60 min
Aug 13, 11:56 PM MDT	Special Weather Statement	PIH	Cassia	64 min
Aug 14, 12:51 AM MDT	Special Weather Statement	PIH	Bannock, Bingham, Jefferson, Power	84 min
Aug 14, 2:03 AM MDT	Special Weather Statement	PIH	Bingham, Bonneville, Jefferson, Madison	87 min
Aug 14, 3:27 AM MDT	Special Weather Statement	PIH	Bannock, Bingham, Bonneville, Clark, Fremont, Jefferson and 1 more	93 min
Aug 14, 2:12 PM MDT	Special Weather Statement	PIH	Bannock	48 min
Aug 14, 2:46 PM MDT	Areal Flood Advisory	PIH	Bannock, Bingham, Caribou, Power	3 hr
Aug 14, 3:05 PM MDT	Flash Flood Warning	PIH	Bannock	3 hr
Aug 14, 3:22 PM MDT	Flash Flood Warning	PIH	Cassia, Oneida, Power	3 hr
Aug 14, 3:36 PM MDT	Severe Thunderstorm Warning	PIH	Cassia, Power	39 min
Aug 14, 3:55 PM MDT	Severe Thunderstorm Warning	PIH	Bonneville	35 min
Aug 14, 4:04 PM MDT	Areal Flood Advisory	PIH	Bonneville, Caribou	116 min
Aug 14, 4:38 PM MDT	Special Weather Statement	PIH	Bannock	52 min
Aug 14, 4:52 PM MDT	Special Weather Statement	PIH	Caribou	23 min
Aug 14, 5:29 PM MDT	Areal Flood Advisory	PIH	Cassia	2 hr

Nearby

Severe Thunderstorm Warnings in Idaho, 2014 Every severe thunderstorm warning 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.