Alert archive / Idaho / Special Weather Statements in 2021
Special Weather Statement, NWS Pocatello, ID
NWS Pocatello, ID issued this special weather statement at Jun 4, 2021, 7:47 PM MDT for Cassia County, Idaho. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 4, 2021, 7:47 PM MDT (01:47 UTC)
- Expired
- Jun 4, 2021, 8:45 PM MDT
- In force
- 58 min
- Issued by
- NWS Pocatello, ID
County Cassia County, ID
The radar
The Pocatello radar (KSFX), 159 km from the middle of the area, began a volume at 01:49 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
Elko, NV (KLKN), launched 00:00Z, 1.8 hours before the alert went out and 148 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
- 152 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 3808 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Jun 4, 1:26 PM MDT, 6 hours 21 minutes earlier.
Area forecast discussion, Jun 4, 1:26 PM MDT, 6 hours 21 minutes before
Area Forecast Discussion National Weather Service Pocatello ID 126 PM MDT Fri Jun 4 2021 .SHORT TERM (Tonight - Sunday)... Near-record to record warmth continues today across eastern Idaho before we get a little relief this weekend, although temps will still run well above normal. A dry front is moving through the area bringing a brief increase in cloud cover but skies will continue to feature more sun than clouds for much of the remainder of the day. Hi-res models continue to indicate the potential for some isolated to scattered showers/storms primarily along the Divide through Island Park. May see a few as well across the South Hills and along the Utah border but these will be a bit more isolated in nature. Any storms could produce brief gusty winds. Highs will top out in the low to mid 90s across the lower elevations this afternoon. Saturday will be cooler, but temps will still run above normal, along with breezy conditions. Issued a Lake Wind Advisory for the afternoon hours across the American Falls Reservoir. Additionally, winds across the Arco Desert will be close to Wind Advisory levels although held off on issuance for now as confidence is quite as high. It'll be close though and the overnight shift may need to issue one. Convective potential for Saturday should be more limited and this time focused mainly in the far SE corner of the state along the Utah border. As we move into Sunday, things may be a tad breezy in the afternoon across the Upper Snake Plain, Arco Desert up towards the Montana border. Otherwise, expect ample sunshine, no precip and temps in the upper 70s to lower 80s across the lower terrain. McKaughan .LONG TERM (Monday through Friday)... Monday looks dry as the main low reloads offshore, and a weaker low still remaining near the southern California coast. It will be breezy and just above average temperature-wise. This is shown in all of the models and cluster forecasts. There general agreement for Tuesday with a few showers and storms in the forecast. The location will determine how quickly the weak low to the south swings northeast and is absorbed into the flow around the main storm offshore. Agreement and certainly quickly begin to fade Wednesday and beyond. The camps are pretty evenly split between the low remaining offshore and the low weakening and shifting inland for Wednesday. The Blend of Models is leaning a bit more toward the low inland (ECMWF) idea with some showers and storms across northern locations. For the end of the week, the cluster forecasts mostly show some type of ridge rebuilding across the West (varying strengths at this point and similar to the ECMWF)...with one showing low pressure remaining inland (similar to the GFS). The Blend falls into the majority category with perhaps a few storms along closer to the Montana border. Keyes && .AVIATION... Another round of isolated showers and storms could impact TAF sites into this evening. Gusts over 35kts are possible with little rain expected. A low confidence forecast for tonight and Saturday morning. Depending on what model you look at, there COULD be pockets of showers lingering impacting particular airport or airports. We included VCSH in the TAFs for this period, but we could easily see nothing at all. For Saturday afternoon, most of the expected storm develop will be across the southeast corner...maybe close enough to include VCTS at PIH and certainly DIJ. Again, gusty outflow winds would be the main risk. The overall wind pattern will remain breezy through the rest of the day and again Saturday. Sustained winds up to 20kts with higher gusts are possible at all sites except SUN. However, it does appear SUN should see a pattern shift toward a westerly gap wind later in the afternoon vs the normal southerly wind. Keyes && .PIH WATCHES/WARNINGS/ADVISORIES... Lake Wind Advisory from 11 AM to 9 PM MDT Saturday for IDZ054. &&
In the hours before
Local storm report, Jun 4, 4:49 PM MDT, 2 hours 58 minutes before
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</html>Special weather statement, Jun 4, 4:54 PM MDT, 2 hours 53 minutes before
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</html>Local storm report, Jun 4, 4:57 PM MDT, 2 hours 50 minutes before
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</html>Special weather statement, Jun 4, 5:16 PM MDT, 2 hours 31 minutes before
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</html>Special weather statement, Jun 4, 5:25 PM MDT, 2 hours 22 minutes before
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</html>Local storm report, Jun 4, 5:52 PM MDT, 1 hour 55 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 4, 6:40 PM MDT | Special Weather Statement | PIH | Franklin | 65 min |
| Jun 4, 7:31 PM MDT | Special Weather Statement | PIH | Franklin | 59 min |
| Jun 5, 3:30 AM MDT | Wind Advisory | PIH | Bingham, Bonneville, Butte, Jefferson | 18 hr |
| Jun 5, 3:18 PM MDT | Special Weather Statement | PIH | Caribou | 57 min |
Nearby
Special Weather Statements in Idaho, 2021Every special weather statement in 2021
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.