Alert archive / Idaho / Severe Thunderstorm Warnings in 2022
Severe Thunderstorm Warning 53, NWS Pocatello, ID
NWS Pocatello, ID issued this severe thunderstorm warning at Sep 21, 2022, 4:44 PM MDT for Butte County, Clark County, Jefferson County, Idaho. It was in force for 46 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
- Sep 21, 2022, 4:44 PM MDT (22:44 UTC)
- Expired
- Sep 21, 2022, 5:30 PM MDT
- In force
- 46 min
- Issued by
- NWS Pocatello, ID
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Butte County, ID, Clark County, ID, Jefferson County, ID
The radar
The Pocatello radar (KSFX), 93 km from the middle of the area, began a volume at 22:48 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 21, 12:40 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 10.7 hours before the alert went out and 353 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
- 948 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 120 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 Sep 21, 1:20 PM MDT, 3 hours 24 minutes earlier.
Area forecast discussion, Sep 21, 1:20 PM MDT, 3 hours 24 minutes before
Area Forecast Discussion National Weather Service Pocatello ID 120 PM MDT Wed Sep 21 2022 .SHORT TERM...tonight through Thursday night. Upper low over northern California will move into eastern Oregon tonight before arriving in western Montana on Thursday. Central and eastern Idaho is under a favorable area for severe thunderstorms with over 50kts of 0-6km shear present over the region. Main severe threat includes large hail and damaging winds, an isolated tornado due to interaction with the terrain is possible but not likely because of weak low level shear. A severe thunderstorms watch is in effect for most of central and east Idaho into the early evening hours. A cold front will march through the area this evening, with cooler more stable air filtering into the region. HREF shows rounds of showers and thunderstorms moving from southwest to northeast through the night. Showers and thunderstorms will be possible through the day tomorrow, mainly across the high country. Storms are moving rather quickly which will limit the flooding threat, however, given precipitable water values of greater than 0.75" some heavy downpours are possible. As these storms advance into the upper Snake highlands, we expect the rainfall totals to mount through the night and into Thursday. Rainfall totals of 0.1-0.5" inches are likely most areas with 0.7-1.5" possible across the greater Island Park/Driggs areas. Rainfall amounts may vary greatly depending upon which areas see storms tonight. 13 .LONG TERM...Friday through Wednesday The extended forecast is looking warm and dry for the most part. Ridging starts to build back in on Friday and strengthens throughout the weekend and early next week. We will still be a bit breezy on Friday as the closed low continues farther north an east with gusts around 15-25 kts. As the ridge strengthens, our temperatures will warm into the upper 70s and low 80s by Sunday and stay above average for this time of the year at least into midweek. Generally speaking, record highs next week are in the low to mid 80s, so we will be back in record-high territory with our afternoon highs Monday through Wednesday. The higher elevations will see highs in the mid to upper 70s. There is a bit of disagreement between the GFS and ECMWF on timing, but both models show a weak shortwave working its way through during the late Tuesday/Wednesday time frame. This would help flatten the ridge a bit ahead of the next potential system arriving at the end of next week. As that system is outside of the forecast period and over a week away, there are plenty of uncertainties with it and for now is just something to watch as models evolve over the next week. AMM && .AVIATION...18Z Wednesday - 18Z Thursday Expect showers and thunderstorms through the afternoon, evening, and overnight into Thursday. Conditions look to stay overall VFR, but CIGs/VIS will approach and could drop to MVFR when storms pass over terminals. These storms could produce some good downpours, lightning, and gusty winds. Some storms could be severe, producing 60+ mph gusts. Outside of storms, gusts around 20-25 kts will be possible, though gusts from outflow boundaries could be stronger. While the bulk of the widespread activity looks to wrap up around 12Z Thursday, spotty showers will continue through Thursday before we dry out completely by Friday morning. AMM && .FIRE WEATHER...A low pressure system and associated cold front will work through the region tonight. Many areas will see showers and thunderstorms with widespread wetting rains likely. Isolated to scattered showers with isolated thunderstorms are possible Thursday. Gusty winds are likely as well on Thursday with gusts of 20-25 mph possible.. 13 && .PIH WATCHES/WARNINGS/ADVISORIES... None. &&
In the hours before
Local storm report, Sep 21, 4:24 PM MDT, 20 minutes before
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</html>Local storm report, Sep 21, 4:27 PM MDT, 17 minutes before
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</html>Local storm report, Sep 21, 4:33 PM MDT, 11 minutes before
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</html>Local storm report, Sep 21, 4:37 PM MDT, 7 minutes before
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</html>Local storm report, Sep 21, 4:41 PM MDT, 3 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 |
|---|---|---|---|---|
| Sep 21, 12:08 PM MDT | Special Weather Statement | PIH | Power | 37 min |
| Sep 21, 12:38 PM MDT | Special Weather Statement | PIH | Bannock | 37 min |
| Sep 21, 1:34 PM MDT | Special Weather Statement | PIH | Blaine | 41 min |
| Sep 21, 1:51 PM MDT | Special Weather Statement | PIH | Custer | 39 min |
| Sep 21, 2:03 PM MDT | Special Weather Statement | PIH | Lincoln, Minidoka | 42 min |
| Sep 21, 2:10 PM MDT | Special Weather Statement | PIH | Bear Lake, Franklin | 50 min |
| Sep 21, 2:18 PM MDT | Special Weather Statement | PIH | Caribou | 42 min |
| Sep 21, 2:26 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Bear Lake, Caribou | 34 min |
| Sep 21, 2:55 PM MDT | Special Weather Statement | PIH | Blaine, Custer, Lincoln | 65 min |
| Sep 21, 2:58 PM MDT | Special Weather Statement | PIH | Power | 62 min |
| Sep 21, 3:23 PM MDT | Special Weather Statement | PIH | Teton | 37 min |
| Sep 21, 3:38 PM MDT | Special Weather Statement | PIH | Butte | 67 min |
| Sep 21, 4:27 PM MDT | Special Weather Statement | PIH | Power | 33 min |
| Sep 21, 4:34 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida, Power | 26 min |
| Sep 21, 4:59 PM MDT | Special Weather Statement | PIH | Power | 46 min |
| Sep 21, 5:31 PM MDT | Special Weather Statement | PIH | Clark | 44 min |
Nearby
Severe Thunderstorm Warnings in Idaho, 2022Every severe thunderstorm warning in 2022
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.