Alert archive / Idaho / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 8, NWS Pocatello, ID
NWS Pocatello, ID issued this severe thunderstorm warning at May 3, 2009, 3:37 PM MDT for Cassia County, Minidoka County, Idaho. It was in force for 34 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
- May 3, 2009, 3:37 PM MDT (21:37 UTC)
- Expired
- May 3, 2009, 4:11 PM MDT
- In force
- 34 min
- Issued by
- NWS Pocatello, ID
- Area
- Storm-based polygon
Counties Cassia County, ID, Minidoka County, ID
The radar
The Pocatello radar (KSFX), 97 km from the middle of the area, began a volume at 21:40 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
Boise Airport, ID (KBOI), launched 12:00Z, 9.6 hours before the alert went out and 237 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
- 2 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 908 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 142 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 May 3, 1:05 PM MDT, 2 hours 32 minutes earlier.
Area forecast discussion, May 3, 1:05 PM MDT, 2 hours 32 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE POCATELLO ID 105 PM MDT SUN MAY 3 2009 .SHORT TERM...LEE SIDE TROUGHING BEGINNING TO SHOW IN MONTANA AND ALBERTA AND EXPECT SURFACE FRONT THROUGH THE CENTRAL MOUNTAINS TO BECOME MORE DEVELOPED SHORTLY. ALTHOUGH A SECOND FRONT WILL PROBABLY FOLLOW LATER THIS EVENING AS INDICATED IN MODELS. CONVECTION BEGINNING TO DEVELOP IN SOUTHWEST IDAHO SUPPORTED BY 100 KT 300 MB JET COMING IN ALONG THE CALIFORNIA AND OREGON BORDER. SCATTERED THUNDERSTORMS SHOULD DEVELOP OVER THE NEXT FEW HOURS IN SOUTHEAST IDAHO. MODEL SOUNDINGS AND 12Z UPPER AIR AT BOISE SUPPORTS INCREASED WIND SHEAR...ENOUGH TO SUPPORT ORGANIZED CELLS WITH GUSTY WINDS AND SMALL HAIL. COULD BE BORDERLINE SEVER ACTIVITY. BY MIDNIGHT ACTIVITY WILL BE OVER LEAVING WEAK RIDGE AND A BREAK IN ACTIVITY UNTIL THE NEXT DISTURBANCE EMBEDDED IN WESTERLY FLOW ARRIVES MONDAY NIGHT...AND A THIRD QUICK MOVER TUESDAY NIGHT INTO WEDNESDAY. .LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY NIGHT. ZONAL PATTERN CONTINUES THROUGH MUCH OF THE LONG RANGE. A SHORTWAVE IS EXPECTED TO PUSH MOISTURE INTO EASTERN IDAHO INTO WEDNESDAY NIGHT HOWEVER VERY WEAK RIDGING SHIFTS THIS MOISTURE PRIMARILY INTO THE CENTRAL MOUNTAINS BY THURSDAY. SHOWERS WILL LIKELY COMBINE WITH ISOLATED THUNDERSTORMS INTO WEDNESDAY EVENING WITH MARGINAL INSTABILITY EXPECTED. POPS TREND LOWER INTO THURSDAY NIGHT WITH THE FLAT RIDGE BRIEFLY HOLDING OF THE AREA. THIS RIDGE IS REPLACED BY A TROUGH AND COLD FRONT ARRIVING AROUND THE SATURDAY/SATURDAY NIGHT TIME FRAME. TEMPERATURES WILL MAINTAIN NEAR OR CLOSE TO CLIMATOLOGY. HANKO && .AVIATION...SHOWERS WILL INCREASE ACROSS THE AREA THIS AFTERNOON WITH ENOUGH INSTABILITY TO TRIGGER SCATTERED THUNDERSTORMS AS WELL. THUNDERSTORMS COULD PRODUCE GUSTY WINDS AND BRIEF PERIODS OF IFR/MVFR CEILINGS AND VIS. BEST CHANCE FOR THUNDERSTORMS WILL BE FROM 21Z TO 03Z. THUNDERSTORMS ARE EXPECTED TO DISSIPATE DURING THE EVENING HOURS WITH SHOWERS BECOMING ISOLATED. VFR CONDITIONS EXPECTED OVERNIGHT AND MONDAY. HANKO && .PIH WATCHES/WARNINGS/ADVISORIES...NONE. &&
Hazardous weather outlook, May 3, 5:55 AM MDT, 9 hours 42 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE POCATELLO ID 555 AM MDT SUN MAY 3 2009 IDZ017>025-031-032-041200- 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- 555 AM MDT SUN MAY 3 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN IDAHO. .DAY ONE...TODAY AND TONIGHT VIGOROUS COLD FRONT WILL MOVE THROUGH GEM STATE TODAY FIRING OFF SOME THUNDERSTORMS AFTER 12PM. SOME THUNDERSTORMS WILL BE STRONG TODAY PRODUCING SMALL HAIL AND GUSTY WINDS. A FEW STORMS MIGHT REACH SEVERE CRITERIA. MOST STORMS WILL FORM OVER SNAKE RIVER PLAIN AND AREAS SOUTH. CONVECTION WILL DIE DOWN BY SUNSET LEAVING SOME LINGERING SHOWERS OVER EASTERN AREAS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NEXT CHANCE FOR POSSIBLY SEVERE WEATHER WILL BE TUESDAY AFTERNOON AS ANOTHER WAVE MOVES OVER SOUTHEASTERN IDAHO. .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, May 3, 2:28 PM MDT, 1 hour 9 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 |
|---|---|---|---|---|
| May 3, 2:18 PM MDT | Severe Thunderstorm Warning | PIH | Power | 26 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.