Alert archive / Idaho / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 22, NWS Pocatello, ID

May 27, 2018Bingham County, Caribou County, Idaho

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.

Skew-T log-pSkew-T log-p diagram, Riverton, WY at 12:00Z on 2018-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 52 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 12:00Z on 2018-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

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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Special weather statement, May 27, 11:28 AM MDT, 1 hour 32 minutes before
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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

Everything else NWS Pocatello, ID issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 26, 6:08 PM MDTSpecial Weather StatementPIHCuster52 min
May 26, 7:27 PM MDTSpecial Weather StatementPIHCaribou48 min
May 26, 8:01 PM MDTSpecial Weather StatementPIHCaribou44 min
May 26, 10:09 PM MDTSpecial Weather StatementPIHBannock51 min
May 27, 10:37 AM MDTRiver Flood WarningPIHCuster6 days
May 27, 11:28 AM MDTSpecial Weather StatementPIHBonneville92 min
May 27, 12:38 PM MDTRiver Flood WarningPIHCuster15 days
May 27, 1:47 PM MDTSpecial Weather StatementPIHBannock43 min
May 27, 2:48 PM MDTSpecial Weather StatementPIHButte42 min
May 27, 2:56 PM MDTSpecial Weather StatementPIHButte34 min
May 27, 3:22 PM MDTSpecial Weather StatementPIHButte38 min
May 27, 3:59 PM MDTSpecial Weather StatementPIHButte31 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.