Alert archive / Idaho / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 31, NWS Pocatello, ID
NWS Pocatello, ID issued this severe thunderstorm warning at Jun 21, 2009, 4:14 PM MDT for Bingham County, Bonneville County, Jefferson County, Idaho. It was in force for 39 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
- Jun 21, 2009, 4:14 PM MDT (22:14 UTC)
- Expired
- Jun 21, 2009, 4:53 PM MDT
- In force
- 39 min
- Issued by
- NWS Pocatello, ID
- Area
- Storm-based polygon
Counties Bingham County, ID, Bonneville County, ID, Jefferson County, ID
The radar
The Pocatello radar (KSFX), 62 km from the middle of the area, began a volume at 22:17 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 21, 2:41 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 10.2 hours before the alert went out and 300 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1578 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 133 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jun 21, 1:10 PM MDT, 3 hours 4 minutes earlier.
Area forecast discussion, Jun 21, 1:10 PM MDT, 3 hours 4 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE POCATELLO ID 110 PM MDT SUN JUN 21 2009 .SHORT TERM...THIS AFTERNOON AND TONIGHT. CONVECTION FIRING QUICKLY THIS AFTERNOON AHEAD OF EJECTING UPPER WAVE CURRENTLY OVER ERN OREGON. LIKE NAM DEPICTION LATE THIS AFTERNOON/EARLY EVE WITH BEST FORCING NEAR CNTRL MOUNTAINS. BOI SOUNDING INDICATING .80+ PW/S SO HAVE OPTED TO ISSUE A FLASH FLOOD WATCH FOR SELECT MOUNTAIN ZONES THROUGH MIDNIGHT. GFS LIFTS WAVE INTO REGION THIS EVENING WITH CORRESPONDING INCREASE IN PRECIPITATION/TSTMS POSITIONED ALONG THE SE HIGHLANDS. PROXIMITY OF UPPER JET ARCHING THROUGH REGION IS EXPECTED TO PROVIDE DECENT SHEAR TO SUPPORT POTENTIALLY SEVERE THUNDERSTORM DEVELOPMENT. HAVE CONTINUED HAIL/GUSTY WIND/HEAVY RAIN WORDING IN ZONES THROUGH THE EVENING. HUSTON .LONG TERM...MONDAY THROUGH SUNDAY. MODELS CONTINUE TO SHIFT CENTER OF UPPER RIDGE FROM LOUISIANA WWRD TO NW TEXAS/NEW MEXICO BY TUESDAY/WEDNESDAY WITH AN OVERALL DRYING/WARMING TREND EXPECTED. TWO WRINKLES NOTED IN THAT GENERAL SCENARIO...THE FIRST IS A POTENTIAL PUSH OF MOISTURE ROTATING NORTH ABOUT THE LEADING/WRN EDGE OF THE HIGH INTO THE GREAT BASIN WEDNESDAY/THURSDAY. SECOND WRINKLE IS THAT GFS/ECMWF ARE STRUGGLING WITH HOW TO HANDLE A WEAK/MODEST CLOSED LOW OFF THE CALIFORNIA COAST. GFS IS MUCH MORE PROGRESSIVE LIFTING IT NE THROUGH THE REGION THURSDAY WHEREAS THE ECMWF BRINGS IT INLAND FRIDAY/SATURDAY. THUS HAVE MAINTAINED SOME MENTION OF PRECIPITATION WITHIN THE FORECAST DURING THAT TIME FRAME...OTHERWISE DRY AND WARMER. HUSTON && .AVIATION...SCATTERED THUNDERSTORMS ON TAP FOR THIS AFTERNOON AND EVENING WITH HEAVY RAIN AND SOME HAIL. EXPECT THUNDERSTORMS TO IMPACT ALL TERMINALS FOR BRIEF PERIODS INTO MID-EVENING...WITH MVFR VIS/CIG CONDITIONS EXPECTED. DSH && .FIRE WEATHER...ANOTHER ROUND OF THUNDERSTORMS THIS AFTERNOON AND EVENING AS AN UPPER LEVEL FRONT MOVES THROUGH THE REGION. DRIER WEATHER IS EXPECTED FOR MUCH OF THIS WEEK AS THE UPPER LEVEL PATTERN SHIFTS AND HIGH PRESSURE SETTLES IN. DSH && .HYDROLOGY...SATURATED SOILS WITH MODERATE TO HEAVY CONVECTION HAS PROMPTED A FLASH FLOOD WATCH ACROSS SELECT MOUNTAIN ZONES THOUGH MIDNIGHT. ELEVATED RESERVOIR RELEASES COUPLED WITH RECENT RAINFALL HAS DRIVEN RIVER LEVELS ABOVE FLOOD STAGE ON THE SNAKE RIVER IN BLACKFOOT. FORECAST LEVELS ON THE HENRYS NEAR BLACKFOOT ARE EXPECTED TO PUSH JUST ABOVE FLOOD STAGE BY MONDAY AFTERNOON. SEE STATEMENTS FOR FURTHER DETAILS. HUSTON && .PIH WATCHES/WARNINGS/ADVISORIES...FLOOD WARNING FOR THE HENRYS FORK NEAR REXBURG AND THE SNAKE RIVER AT BLACKFOOT UNTIL FURTHER NOTICE. FLASH FLOOD WATCH FOR 18/31/22>25 UNTIL MIDNIGHT. &&
Hazardous weather outlook, Jun 21, 5:50 AM MDT, 10 hours 24 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE POCATELLO ID 550 AM MDT SUN JUN 21 2009 IDZ017>025-031-032-221300- 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- 550 AM MDT SUN JUN 21 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO. .DAY ONE...TODAY AND TONIGHT EXPECT SHOWERS AND THUNDERSTORMS TODAY. SOME STORMS MAY CONTAIN DAMAGING WINDS AND HEAVY RAIN. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY EXPECT DRIER WEATHER BEGINNING MONDAY AND CONTINUING THROUGH MOST OF THE WEEK. ONLY ISOLATED THUNDERSTORMS WILL BE PRESENT. .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, Jun 21, 2:57 PM MDT, 1 hour 17 minutes before
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</html>Local storm report, Jun 21, 3:04 PM MDT, 1 hour 10 minutes before
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</html>Local storm report, Jun 21, 3:15 PM MDT, 59 minutes before
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</html>Local storm report, Jun 21, 3:24 PM MDT, 50 minutes before
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</html>Local storm report, Jun 21, 3:53 PM MDT, 21 minutes before
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</html>The office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 11:37 AM MDT | Flash Flood Watch | PIH | 9 hr | |
| Jun 21, 12:37 PM MDT | Special Weather Statement | PIH | Bingham | 53 min |
| Jun 21, 1:58 PM MDT | Severe Thunderstorm Warning | PIH | Blaine, Cassia, Power | 32 min |
| Jun 21, 2:24 PM MDT | Severe Thunderstorm Warning | PIH | Bingham, Blaine, Cassia, Power | 36 min |
| Jun 21, 2:53 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Power | 37 min |
| Jun 21, 3:31 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bingham, Bonneville, Caribou, Power | 44 min |
| Jun 21, 3:38 PM MDT | Areal Flood Advisory | PIH | Bannock, Bingham, Cassia, Power | 3 hr |
| Jun 21, 5:00 PM MDT | Special Weather Statement | PIH | Clark, Jefferson | 30 min |
| Jun 21, 5:06 PM MDT | Special Weather Statement | PIH | Bonneville, Madison | 39 min |
| Jun 21, 5:30 PM MDT | Special Weather Statement | PIH | Clark, Fremont | 45 min |
| Jun 21, 5:34 PM MDT | Special Weather Statement | PIH | Fremont, Madison, Teton | 41 min |
| Jun 21, 5:49 PM MDT | Special Weather Statement | PIH | Bear Lake, Caribou, Franklin | 41 min |
Nearby
Severe Thunderstorm Warnings in Idaho, 2009Every severe thunderstorm warning in 2009
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.