Alert archive / Idaho / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 29, NWS Pocatello, ID

July 22, 2008Teton County, Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at Jul 22, 2008, 4:26 PM MDT for Teton County, Idaho. It was in force for 19 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 22, 2008, 4:26 PM MDT (22:26 UTC)
Expired
Jul 22, 2008, 4:45 PM MDT
In force
19 min
Issued by
NWS Pocatello, ID
Area
Storm-based polygon

County Teton County, ID

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 22, 1:00 PM MDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 10.4 hours before the alert went out and 336 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 12:00Z on 2008-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 218 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2008-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.193958Sfc1 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
218 J/kg
Mixed-layer CIN
-192 J/kg
Mixed-layer LCL
1938 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 22, 1:48 PM MDT, 2 hours 38 minutes earlier.

Area forecast discussion, Jul 22, 1:48 PM MDT, 2 hours 38 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
148 PM MDT TUE JUL 22 2008

.DISCUSSION...THUNDERSTORMS ARE DEVELOPING OVER WESTERN IDAHO AS
EXPECTED THIS AFTERNOON AHEAD OF A COLD FRONT. THESE STORMS ARE
GRADUALLY WORKING THEIR WAY EASTWARD. AREA IS IN THE SPC SLIGHT
RISK OF SEVERE THUNDERSTORMS. LARGE HAIL AND DAMAGING WINDS ARE
POSSIBLE TODAY. AN ISOLATED TORNADO IS ALSO POSSIBLE.
THUNDERSTORMS ARE EXPECTED TO WORK THEIR WAY FROM WEST TO EAST
THROUGHOUT THE EVENING.

A RIDGE OF HIGH PRESSURE IS EXPECTED TO BUILD BACK INTO THE AREA
FOR WEDNESDAY. THIS SHOULD BRING A RETURN TO DRIER AIR FOR THE
NEXT FEW DAYS. SOME MOISTURE MAY WORK BACK IN FROM THE SOUTH BY
THE WEEKEND WHICH COULD RESULT IN A FEW ISOLATED THUNDERSTORMS.

&&

.AVIATION...AS OF NOON...THERE IS A BREAK IN -SHRA AND -TSRA.
HOWEVER...SHOWERS AND TSTORMS ARE EXPECTED TO DEVELOP AND MOVE
THROUGH EASTERN IDAHO INTO THE EVENING HOURS. EXPECT VFR CONDITIONS
FOR THE MOST PART. WITH STRONGER STORMS...LOWER VIS/CIGS DUE TO
HEAVY RAIN AND GUSTY WINDS/BLOWING DUST ARE POSSIBLE. CONVECTIVE
WIND GUSTS IN EXCESS OF 50 KTS ARE POSSIBLE WITH STRONGEST
STORMS...ALONG WITH LARGE HAIL.  ACTIVITY SHOULD DIE DOWN BY
MIDNIGHT. LATER TONIGHT AND WEDNESDAY WILL BE MUCH QUIETER. WINDS
SHOULD NOT BE A FACTOR WITH ISOLD -TSRA ACROSS MAINLY THE NORTHERN
MTNS. KEYES

&&

.FIRE WEATHER...RED FLAG WARNING WILL CONTINUE AS MORE TSTORMS ARE
EXPECTED THIS AFTN AND EVENING. HAIL...STRONG DOWNBURST
WINDS...POSSIBLY IN EXCESS OF 60 MPH ARE POSSIBLE ALONG WITH PLENTY
OF LIGHTNING. LOCALIZED HEAVY RAINFALL/FLASH FLOODING WITH STRONGER
STORMS INTO THIS EVENING. DRIER AND WARMER RETURNS TOMORROW AND WILL
CONTINUE HEADING INTO THE WEEKEND. KEYES

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
RED FLAG WARNING UNTIL 10 PM MDT THIS EVENING FOR IDZ409-410-412-
477.

FLASH FLOOD WATCH UNTIL 10 PM MDT THIS EVENING FOR IDZ018-031.

&&
Hazardous weather outlook, Jul 22, 7:19 AM MDT, 9 hours 7 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE POCATELLO ID
719 AM MDT TUE JUL 22 2008

IDZ017>025-031-032-231200-
EASTERN MAGIC VALLEY-SAWTOOTH MOUNTAINS-UPPER SNAKE HIGHLANDS-
UPPER SNAKE RIVER PLAIN-LOWER SNAKE RIVER PLAIN-
SOUTH CENTRAL HIGHLANDS-CARIBOU HIGHLANDS-
CACHE VALLEY/IDAHO PORTION-WASATCH MOUNTAINS/IDAHO PORTION-
BIG AND LITTLE WOOD RIVER REGION-LOST RIVER/PAHSIMEROI-
719 AM MDT TUE JUL 22 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS MAY PRODUCE ENOUGH RAINFALL TO CAUSE FLASH
FLOODING/DEBRIS FLOWS IN BURN AREAS OF THE CENTRAL MOUNTAINS TODAY
AND THIS EVENING. A FLASH FLOOD WATCH HAS BEEN ISSUED FOR THESE
AREAS. LATER THIS AFTERNOON...THUNDERSTORMS ACROSS THE CENTRAL
MOUNTAINS AND SOUTHEAST IDAHO COULD PRODUCE STRONG WIND GUSTS AND
LARGE HAIL.

LIGHTNING FROM THUNDERSTORMS MAY ALSO RESULT IN FIRE STARTS...SO A
RED FLAG WARNING CONTINUES TODAY FOR THE SNAKE RIVER PLAIN...AND
PARTS OF THE CENTRAL MOUNTAINS AND SOUTHERN HIGHLANDS

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

WE ASK TRAINED SPOTTERS AND CITIZENS TO REPORT SIGNIFICANT
WEATHER CONDITIONS WHEN IT IS SAFE TO DO SO. THESE CONDITIONS MAY
INCLUDE HAIL...TORNADOES...STRONG WIND...DUST STORMS...SNOWFALL...
EXTREME COLD TEMPERATURES...FREEZING RAIN OR HEAVY RAIN...DENSE
FOG...AND FLOODING OR ICE JAMS. INFORMATION ABOUT THESE HAZARDOUS
CONDITIONS SHOULD BE CALLED INTO YOUR NATIONAL WEATHER SERVICE
OFFICE IN POCATELLO USING THE 1-800 SEVERE WEATHER HOTLINE...OR
208-233-0834.

In the hours before

Local storm report, Jul 22, 2:34 PM MDT, 1 hour 52 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ID
234 PM MDT TUE JUL 22 2008

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

0210 PM     TSTM WND DMG     STANLEY                 44.22N 114.94W
07/22/2008                   CUSTER             ID   EMERGENCY MNGR

            POWER OUTAGE REPORTED IN STANLEY

&&

TWYATT
Local storm report, Jul 22, 2:41 PM MDT, 1 hour 45 minutes before
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Local storm report, Jul 22, 2:49 PM MDT, 1 hour 37 minutes before
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Local storm report, Jul 22, 2:55 PM MDT, 1 hour 31 minutes before
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Local storm report, Jul 22, 3:17 PM MDT, 1 hour 9 minutes before
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Local storm report, Jul 22, 3:32 PM MDT, 54 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 2:44 AM MDTFlash Flood WatchPIH18 hr
Jul 22, 12:48 PM MDTFlash Flood WarningPIHBlaine, Custer117 min
Jul 22, 1:10 PM MDTSevere Thunderstorm WarningPIHCuster50 min
Jul 22, 2:02 PM MDTSevere Thunderstorm WarningPIHCuster43 min
Jul 22, 2:20 PM MDTSevere Thunderstorm WarningPIHCuster25 min
Jul 22, 2:34 PM MDTFlash Flood WarningPIHBlaine, Custer116 min
Jul 22, 2:39 PM MDTSevere Thunderstorm WarningPIHLincoln, Minidoka51 min
Jul 22, 3:28 PM MDTSevere Thunderstorm WarningPIHBlaine, Minidoka32 min
Jul 22, 3:35 PM MDTSevere Thunderstorm WarningPIHBonneville, Madison, Teton33 min
Jul 22, 4:00 PM MDTSevere Thunderstorm WarningPIHBlaine, Minidoka, Power45 min
Jul 22, 4:12 PM MDTSevere Thunderstorm WarningPIHBingham, Bonneville, Madison, Teton48 min
Jul 22, 4:45 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham, Power45 min
Jul 22, 4:58 PM MDTSevere Thunderstorm WarningPIHBonneville, Teton32 min
Jul 22, 5:31 PM MDTSevere Thunderstorm WarningPIHBingham29 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2008Every severe thunderstorm warning in 2008

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.