Alert archive / Idaho / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 22, NWS Pocatello, ID

July 21, 2014Bannock County, Power County, Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at Jul 21, 2014, 7:16 PM MDT for Bannock County, Power County, Idaho. It was in force for 44 min. 2 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
Jul 21, 2014, 7:16 PM MDT (01:16 UTC)
Expired
Jul 21, 2014, 8:00 PM MDT
In force
44 min
Issued by
NWS Pocatello, ID
Area
Storm-based polygon

Counties Bannock County, ID, Power County, ID

The radar

The Pocatello radar (KSFX), 48 km from the middle of the area, began a volume at 01:16 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
Jul 21, 7:44 PM MDTTSTM WND DMG1 E Pocatello, IDNUMEROUS POWER OUTAGES IN POCATELLO
Jul 21, 7:49 PM MDTHAIL 0.75Pocatello, ID

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 28 minutes after it went out.

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

Salt Lake City I, UT (KSLC), launched 00:00Z, 1.3 hours before the alert went out and 226 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, Salt Lake City I, UT at 00:00Z on 2014-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 00:00Z on 2014-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 96 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
4444 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
96 m²/s²
0-3 km storm-relative helicity
107 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.

439 
WUUS55 KPIH 220116
SVRPIH
IDC005-077-220200-
/O.NEW.KPIH.SV.W.0022.140722T0116Z-140722T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE POCATELLO
ISSUED BY NATIONAL WEATHER SERVICE BOISE ID
716 PM MDT MON JUL 21 2014

THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL BANNOCK COUNTY IN SOUTHEAST IDAHO...
  NORTHEASTERN POWER COUNTY IN SOUTHEAST IDAHO...

* UNTIL 800 PM MDT

* AT 715 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DESTRUCTIVE WINDS IN
  EXCESS OF 70 MPH. THIS STORM WAS LOCATED NEAR FORT HALL BANNOCK
  CREEK LODGE...OR 12 MILES SOUTHWEST OF POCATELLO...AND MOVING
  NORTHEAST AT 30 MPH.

* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  EASTERN AMERICAN FALLS RESERVOIR AROUND 720 PM MDT.
  POCATELLO AIRPORT AROUND 730 PM MDT.
  MCCAMMON AND PORTNEUF GAP AROUND 740 PM MDT.
  POCATELLO...INKOM...CHUBBUCK AND FORT HALL BUFFALO LODGE AROUND 750
  PM MDT.
  FORT HALL MOUNT PUTNAM AND FORT HALL TOWNSITE AROUND 800 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

WHEN SAFE TO DO SO...PLEASE RELAY STORM REPORTS TO THE NATIONAL
WEATHER SERVICE IN BOISE IDAHO VIA LOCAL LAW ENFORCEMENT...OR NWS
POCATELLO FACEBOOK AND TWITTER ACCOUNTS.

&&

LAT...LON 4273 11276 4301 11258 4302 11206 4295 11208
      4294 11213 4284 11212 4281 11212 4281 11214
      4276 11214 4270 11211 4270 11209 4261 11210
      4255 11259
TIME...MOT...LOC 0115Z 234DEG 24KT 4272 11259 

$$

JDS
2 follow-up statements
524 
WWUS55 KPIH 220139
SVSPIH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO
ISSUED BY NATIONAL WEATHER SERVICE BOISE ID
739 PM MDT MON JUL 21 2014

IDC005-077-220200-
/O.CON.KPIH.SV.W.0022.000000T0000Z-140722T0200Z/
BANNOCK ID-POWER ID-
739 PM MDT MON JUL 21 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MDT
FOR NORTH CENTRAL BANNOCK AND NORTHEASTERN POWER COUNTIES...

AT 738 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL AND DESTRUCTIVE WINDS IN EXCESS OF 70
MPH. THIS STORM WAS LOCATED OVER NORTHEASTERN POCATELLO...MOVING 
NORTHEAST AT 30 MPH. MUILTIPLE POWER OUTAGES HAVE BEEN REPORTED IN 
POCATELLO DUE TO STRONG WINDS.

THIS SEVERE STORM WILL BE NEAR...
  EASTERN AMERICAN FALLS RESERVOIR AND INKOM AROUND 740 PM MDT.
  FORT HALL TOWNSITE AROUND 750 PM MDT.
  FORT HALL MOUNT PUTNAM AROUND 800 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

WHEN SAFE TO DO SO...PLEASE RELAY STORM REPORTS TO THE NATIONAL
WEATHER SERVICE IN BOISE IDAHO VIA LOCAL LAW ENFORCEMENT...OR NWS
POCATELLO FACEBOOK AND TWITTER ACCOUNTS.

&&

LAT...LON 4273 11276 4301 11258 4302 11206 4295 11208
      4294 11213 4284 11212 4281 11212 4281 11214
      4280 11214 4279 11218 4258 11258
TIME...MOT...LOC 0138Z 230DEG 25KT 4291 11241 

$$

JDS
965 
WWUS55 KPIH 220151
SVSPIH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO
ISSUED BY NATIONAL WEATHER SERVICE BOISE ID
751 PM MDT MON JUL 21 2014

IDC005-077-220200-
/O.EXP.KPIH.SV.W.0022.000000T0000Z-140722T0200Z/
BANNOCK ID-POWER ID-
751 PM MDT MON JUL 21 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BANNOCK AND
NORTHEASTERN POWER COUNTIES WILL EXPIRE AT 800 PM MDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

WHEN SAFE TO DO SO...PLEASE RELAY STORM REPORTS TO THE NATIONAL
WEATHER SERVICE IN BOISE IDAHO VIA LOCAL LAW ENFORCEMENT...OR NWS
POCATELLO FACEBOOK AND TWITTER ACCOUNTS.

LAT...LON 4273 11276 4301 11258 4302 11206 4295 11208
      4294 11213 4284 11212 4281 11212 4281 11214
      4280 11214 4279 11218 4258 11258
TIME...MOT...LOC 0142Z 234DEG 24KT 4291 11241 

$$

JDS

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 Jul 21, 2:56 PM MDT, 4 hours 20 minutes earlier.

Area forecast discussion, Jul 21, 2:56 PM MDT, 4 hours 20 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
ISSUED BY NATIONAL WEATHER SERVICE BOISE ID
256 PM MDT MON JUL 21 2014

.DISCUSSION...BAND OF MONSOON MOISTURE CAUGHT UP IN SOUTHWEST FLOW OVER
THE AREA IS SUPPORTING SHOWERS AND THUNDERSTORMS ACROSS THE FORECAST
AREA THIS AFTERNOON. DEEP MOISTURE AND MODERATE SHEAR VALUES ARE
SUPPORTING SOME STRONG CELLS CAPABLE OF SIGNIFICANT HAIL AND WIND
GUSTS TO 50 MPH. BUT OVERALL...THINK THAT HEAVY RAIN IS THE MAIN
THREAT. THESE STORMS SHOULD CONTINUE INTO THE EVENING...BUT WEAKEN
AND DIE OUT AFTER SUNSET. FLOW BECOMES A BIT MORE SOUTHERLY BY
TUESDAY...PUSHING BAND OF MOISTURE FURTHER NORTH...SO THAT SHOWERS
AND THUNDERSTORMS SHOULD BE CONFINED MAINLY TO THE CENTRAL IDAHO
MOUNTAINS.

PACIFIC LOW WILL PUSH INLAND WEDNESDAY INTO THURSDAY. THIS BRINGS
DRIER AND COOLER AIR INTO THE AREA ON THURSDAY...WITH THE POTENTIAL
FOR SIGNIFICANT WINDS. BEYOND THAT...DRY AND SEASONAL TEMPERATURES
PREVAIL THROUGH THE WEEKEND. THE RIDGE BEGINS TO BUILD BACK
NORTHWARD BY EARLY IN THE WEEK...WITH WARMING TEMPERATURES AND
EVENTUALLY WITH THE POTENTIAL FOR SOME MONSOON MOISTURE TO RETURN.
&&

.AVIATION...GENERALLY VFR. WIDESPREAD THUNDERSTORMS WITH HEAVY
RAIN...AND POTENTIAL FOR GUSTS TO 50 MPH THROUGH ABOUT 03Z. ON
TUESDAY...MOISTURE SHIFTS SLIGHTLY NORTHWARD WITH THE THUNDERSTORM
THREAT MOSTLY CONFINED TO AREAS AROUND KSUN AND NORTHWARD.

&&

.FIRE WEATHER...CONTINUING RED FLAG WARNING FOR ZONES 422 425 427
AND 410 THROUGH 03Z THIS EVENING WITH SCATTERED THUNDERSTORMS. SOME
OF THESE PRODUCING HEAVY RAIN...BUT ABUNDANT LIGHTNING AND WIND
GUSTS TO 50 MPH COULD DEFINITELY CAUSE NEW FIRE STARTS AND ERRATIC
FIRE BEHAVIOR. THUNDERSTORM THREAT MOVES SLIGHTLY NORTH ON
TUESDAY...AND SHOULD FAVOR UPSLOPE AREAS ON THE NORTH SIDE OF THE
SNAKE RIVER PLAIN. DRIER CONDITIONS EXPECTED WEDNESDAY AND BEYOND.

&&

.PIH WATCHES/WARNINGS/ADVISORIES...

RED FLAG WARNING UNTIL 9 PM MDT MONDAY FOR IDAHO FIRE ZONES 410 422
425 AND 427.

&&

In the hours before

Special weather statement, Jul 21, 3:14 PM MDT, 4 hours 2 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO
ISSUED BY NATIONAL WEATHER SERVICE BOISE ID
314 PM MDT MON JUL 21 2014

IDZ021>023-212200-
LOWER SNAKE RIVER PLAIN ID-CARIBOU HIGHLANDS ID-
SOUTH CENTRAL HIGHLANDS ID-
314 PM MDT MON JUL 21 2014

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL ONEIDA...WEST
CENTRAL CARIBOU...CENTRAL BANNOCK AND SOUTHEASTERN POWER COUNTIES
UNTIL 400 PM MDT...

AT 313 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 10
MILES SOUTHEAST OF FORT HALL BANNOCK PEAK...OR 22 MILES SOUTHEAST OF
NEELEY...MOVING NORTHEAST AT 35 MPH.

NICKEL SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  ARBON AROUND 320 PM MDT...
  HAWKINS RESERVOIR AROUND 330 PM MDT...
  MCCAMMON AROUND 350 PM MDT...
  POCATELLO...INKOM...AND PORTNEUF GAP AROUND 400 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN SAFE TO DO SO...PLEASE RELAY STORM REPORTS TO THE NATIONAL WEATHER
SERVICE IN POCATELLO IDAHO VIA LOCAL LAW ENFORCEMENT.

&&

LAT...LON 4231 11253 4246 11281 4293 11240 4270 11204
TIME...MOT...LOC 2113Z 216DEG 32KT 4246 11262

TB
Special weather statement, Jul 21, 5:28 PM MDT, 1 hour 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS
ISSUED BY NATIONAL WEATHER SERVICE SALT LAKE CITY UT
528 PM MDT MON JUL 21 2014

IDZ020-021-220015-
LOWER SNAKE RIVER PLAIN ID-UPPER SNAKE RIVER PLAIN ID-
528 PM MDT MON JUL 21 2014

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL POWER...
NORTHWESTERN BANNOCK AND CENTRAL BINGHAM COUNTIES UNTIL 615 PM MDT...

AT 526 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES NORTH OF POCATELLO...MOVING NORTHEAST AT
40 MPH.

HALF INCH HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE ALONG
WITH HEAVY RAINFALL.

LOCATIONS IMPACTED INCLUDE...
BLACKFOOT...GOSHEN...FIRTH...FORT HALL EAGLE LODGE...ROCKFORD...FORT
HALL BUFFALO LODGE...ROSE...PINGREE...FORT HALL TOWNSITE...MORELAND
AND BASALT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF THREATENING WEATHER APPROACHES...TAKE SHELTER IN A STURDY
BUILDING.

&&

LAT...LON 4297 11248 4294 11275 4335 11250 4334 11203
TIME...MOT...LOC 2326Z 219DEG 35KT 4297 11264

MPS
Local storm report, Jul 21, 5:42 PM MDT, 1 hour 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
542 PM MDT MON JUL 21 2014

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

0541 PM     HAIL             6 W LORENZO             43.74N 111.99W
07/21/2014  E0.25 INCH       JEFFERSON          ID   TRAINED SPOTTER

            PEA SIZE HAIL

&&

DPHELPS
Local storm report, Jul 21, 7:07 PM MDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
707 PM MDT MON JUL 21 2014

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

0541 PM     HAIL             12 ENE IDAHOME          42.47N 113.15W
07/21/2014  E0.25 INCH       CASSIA             ID   TRAINED SPOTTER

            PEA SIZE HAIL

&&

DPHELPS
Local storm report, Jul 21, 7:12 PM MDT, 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
712 PM MDT MON JUL 21 2014

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

0705 PM     HAIL             1 ENE POCATELLO         42.89N 112.45W
07/21/2014  M0.25 INCH       BANNOCK            ID   PUBLIC

            REPORTED VIA FACEBOOK.

&&

NWS POCATELLO ID
IRIS SYSTEM
Special weather statement, Jul 21, 7:14 PM MDT, 2 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE POCATELLO
ISSUED BY NATIONAL WEATHER SERVICE BOISE ID
714 PM MDT MON JUL 21 2014

IDZ019-220200-
UPPER SNAKE HIGHLANDS ID-
714 PM MDT MON JUL 21 2014

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN FREMONT COUNTY UNTIL
800 PM MDT...

AT 713 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
CHESTER...OR 9 MILES WEST OF ASHTON...MOVING NORTHEAST AT 20 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  NORTHERN SAINT ANTHONY SAND DUNES AROUND 720 PM MDT.
  ASHTON AND MARYSVILLE AROUND 750 PM MDT.
  WARM RIVER AROUND 800 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN SAFE TO DO SO...PLEASE RELAY STORM REPORTS TO THE NATIONAL
WEATHER SERVICE IN POCATELLO IDAHO VIA LOCAL LAW ENFORCEMENT...OR
NWS POCATELLO FACEBOOK AND TWITTER ACCOUNTS.

&&

LAT...LON 4395 11163 4408 11180 4434 11152 4414 11126
TIME...MOT...LOC 0113Z 226DEG 12KT 4408 11165

BW

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 6:39 PM MDTSevere Thunderstorm WarningPIHCassia, Oneida, Power51 min
Jul 21, 6:55 PM MDTSevere Thunderstorm WarningPIHPower50 min
Jul 21, 7:14 PM MDTSpecial Weather StatementPIHFremont46 min
Jul 21, 7:37 PM MDTAreal Flood AdvisoryPIHBannock, Power113 min
Jul 21, 7:44 PM MDTSevere Thunderstorm WarningPIHCassia46 min
Jul 21, 8:01 PM MDTAreal Flood AdvisoryPIHCassia3 hr
Jul 21, 8:25 PM MDTSevere Thunderstorm WarningPIHCassia, Power35 min
Jul 22, 2:55 AM MDTFire Weather WatchPIHBingham, Blaine, Boise, Bonneville, Butte, Cassia and 11 more34 hr

Nearby

Severe Thunderstorm Warnings in Idaho, 2014Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.