Alert archive / Idaho / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 22, NWS Pocatello, ID
NWS Pocatello, ID issued this severe thunderstorm warning at May 27, 2018, 1:00 PM MDT for Bingham County, Caribou 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
- May 27, 2018, 1:00 PM MDT (19:00 UTC)
- Expired
- May 27, 2018, 1:19 PM MDT
- In force
- 19 min
- Issued by
- NWS Pocatello, ID
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Bingham County, ID, Caribou County, ID
The radar
The Pocatello radar (KSFX), 59 km from the middle of the area, began a volume at 19:04 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
Riverton, WY (KRIW), launched 12:00Z, 7.0 hours before the alert went out and 291 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
- 52 J/kg
- Mixed-layer CIN
- -196 J/kg
- Mixed-layer LCL
- 1809 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 27, 4:04 AM MDT, 8 hours 56 minutes earlier.
Area forecast discussion, May 27, 4:04 AM MDT, 8 hours 56 minutes before
Area Forecast Discussion National Weather Service Pocatello ID 404 AM MDT Sun May 27 2018 .SHORT TERM...Today through Tuesday. Currently there is an upper level low centered over Northern Nevada and Northern Utah. Models continue to show this low to track East Northeast today streaming moisture into our area. This system will bring mostly cooler temperatures and widespread rain, which will bring additional cloud cover likely limiting thunderstorms to just isolated coverage. With these thunderstorms expect small hail, gusty winds, lightning and locally heavy rain. Rainfall amounts continue to be around 0.25, but some areas area could see higher amounts to around 0.50 inch. By Monday the low does weaken and move east over Wyoming. Expect lingering precipitation, particularly in the afternoon. Look for amounts around 0.10 to 0.30, especially in the mountains. Tuesday weak high pressure starts to build in from the west. Expect afternoon thunderstorms mainly over our Eastern areas. Expect temperatures 5 to 10 degrees below normal today and around 5 degrees below normal on Memorial Day and then rising slightly to around normal if not slightly above normal by Tuesday. Wyatt .LONG TERM...Wednesday through next Saturday. Another system moves through the area Wednesday through Friday night bringing moderate precipitation, particularly for our northern areas. The GFS model brings in drier conditions by early Saturday morning and the ECMWF model brings drier conditions by Saturday afternoon. Both models show dry conditions Sunday. Look for slightly above normal temperatures Wednesday and Thursday before dropping below normal on Friday and to a lesser degree on Saturday. Sunday expect near normal to slightly above normal temperatures. Wyatt && .AVIATION...An upper low spins over UT/NV this morning, and will draw moisture in from the southeast. Expect to see widespread precipitation today with isolated afternoon thunderstorms. VFR conditions should prevail, but some of the heavier rainshowers may bring lower ceiling and/or visibility. Hinsberger && .FIRE WEATHER...Widespread precipitation is expected through Monday afternoon while an upper low spins over NV/UT. Isolated thunderstorms are possible again this afternoon with peak heating. Strong wind gusts are possible around the storms. Extensive cloud cover and precipitation will keep humidity high throughout the day. Drier conditions are expected to move into the area on Tuesday as a transient ridge advances through Idaho, and the upper low lifts out of UT. Models continue to show good agreement on a cold front pushing through the region on Wednesday. There is a good chance this front may stall over Idaho giving us more rainfall through Saturday. Hinsberger && .HYDROLOGY...Several area streams and rivers are experiencing high flows and minor flooding. Recent rainfall is aggravating the situation in some areas. Rainfall amounts across most of central and east Idaho today and this evening will generally be in the 0.25 to 0.50 inch range with locally heavier amounts. Additional rainfall is possible Monday with another 0.25 inches possible with locally heavier amounts possible, especially across the Central Idaho mountains. Some area rivers may rise quickly into early next week. Tributaries along the Big Wood, Big Lost, Teton River, and lower Henrys Fork are especially vulnerable. All these rivers will likely peak in the next day or two before gradually dropping off by the end of the week into the weekend. Valle/Wyatt && .PIH WATCHES/WARNINGS/ADVISORIES... None. &&
In the hours before
Local storm report, May 27, 9:43 AM MDT, 3 hours 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
943 AM MDT SUN MAY 27 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0405 PM HAIL RUPERT 42.62N 113.67W
05/26/2018 M1.00 INCH MINIDOKA ID BROADCAST MEDIA
REPORTED VIA KMVT FACEBOOK LIVE FEED.
0427 PM TSTM WND DMG RUPERT 42.62N 113.67W
05/26/2018 MINIDOKA ID BROADCAST MEDIA
MULTIPLE REPORTS OF POWER OUT IN RUPERT. NO
INFORMATION AB OUT HOW MANY OR LENGTH OF
OUTAGE. REPORTED VIA KMVT FACEBOOK LIVE
FEED.
0430 PM HAIL DECLO 42.52N 113.63W
05/26/2018 M0.50 INCH CASSIA ID BROADCAST MEDIA
REPORTED VIA KMVT FACEBOOK LIVE FEED.
0438 PM HAIL 1 S RUPERT 42.61N 113.68W
05/26/2018 M0.50 INCH MINIDOKA ID BROADCAST MEDIA
REPORTED VIA KMVT FACEBOOK LIVE FEED.
&&Local storm report, May 27, 10:40 AM MDT, 2 hours 20 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 26, 6:08 PM MDT | Special Weather Statement | PIH | Custer | 52 min |
| May 26, 7:27 PM MDT | Special Weather Statement | PIH | Caribou | 48 min |
| May 26, 8:01 PM MDT | Special Weather Statement | PIH | Caribou | 44 min |
| May 26, 10:09 PM MDT | Special Weather Statement | PIH | Bannock | 51 min |
| May 27, 10:37 AM MDT | River Flood Warning | PIH | Custer | 6 days |
| May 27, 11:28 AM MDT | Special Weather Statement | PIH | Bonneville | 92 min |
| May 27, 12:38 PM MDT | River Flood Warning | PIH | Custer | 15 days |
| May 27, 1:47 PM MDT | Special Weather Statement | PIH | Bannock | 43 min |
| May 27, 2:48 PM MDT | Special Weather Statement | PIH | Butte | 42 min |
| May 27, 2:56 PM MDT | Special Weather Statement | PIH | Butte | 34 min |
| May 27, 3:22 PM MDT | Special Weather Statement | PIH | Butte | 38 min |
| May 27, 3:59 PM MDT | Special Weather Statement | PIH | Butte | 31 min |
Nearby
Severe Thunderstorm Warnings in Idaho, 2018Every severe thunderstorm warning in 2018
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.