Alert archive / Idaho / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 3, NWS Pocatello, ID

May 26, 2019Butte County, Custer County, Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at May 26, 2019, 2:05 PM MDT for Butte County, Custer County, Idaho. It was in force for 40 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 26, 2019, 2:05 PM MDT (20:05 UTC)
Expired: May 26, 2019, 2:45 PM MDT
In force: 40 min
Issued by: NWS Pocatello, ID
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Butte County, ID, Custer County, ID

The radar

The Pocatello radar (KSFX), 129 km from the middle of the area, began a volume at 20:07 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, 8.1 hours before the alert went out and 204 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1056 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 26, 3:06 AM MDT, 10 hours 59 minutes earlier.

Area forecast discussion, May 26, 3:06 AM MDT, 10 hours 59 minutes before

Area Forecast Discussion
National Weather Service Pocatello ID
306 AM MDT Sun May 26 2019

.SHORT TERM...Today through Tuesday. Southerly flow ahead of our
next storm continues today across eastern Idaho. Slightly drier
air will lift north this morning into our area, before another
surge of moisture this afternoon. With warmer temperatures again
and less coverage this morning, a rapid increase in coverage will
occur this afternoon especially north a of Shoshone-Blackfoot-
Soda Springs line. A dry slot tries to limit development south of
that line, but with recent precipitation...expect less coverage in
showers and storms vs nothing at all. We will likely see some
strong storms with small hail, gusty winds and heavy rain...but no
severe storms are expected. As that next storm shifts east
on Memorial Day, more widespread showers and thunderstorms are
forecast. Thunderstorms will likely be more isolated due to a lack
of instability, but heavier rainfall is again possible along with
small hail. Many areas could see 0.25-0.5" of rainfall, with
locally higher amounts. With the low to our south, we will have to
watch northerly winds on American Falls Reservoir for lake wind
impacts tomorrow. At this point, winds should remain shy of
thresholds to pull the trigger on an advisory. On Tuesday,
expect some showers and isolated thunderstorms moving northeast to
southwest on the back side of the departing low. Again, northerly
winds are going to be flirting with Lake Wind Advisory thresholds
during the day. Temperatures will be bouncing around depending on
cloud cover, especially tomorrow.  Keyes

.LONG TERM...Tuesday night through Sunday.

A weak ill-defined area of low pressure across the western Great
Basin will continue to produce a chance for showers and
thunderstorms on Wednesday. By Thursday, a new better organized low
will enter the Pacific Northwest. This low will help to enhance
shower and thunderstorm activity across central and east Idaho for
late week and into the weekend. Temperatures are expected to be near
or slightly below normal.

Valle

&&

.AVIATION...Showers and thunderstorms will refire once again this
afternoon and continue through the evening hours. Any ceilings will
likely be vfr in most places. There's an outside possibility for
mvfr/ifr ceilings around SUN this morning if the downvalley wind
does not kick in, which is what we've seen past couple of mornings
there. Otherwise, lower ceilings, visibilities and gusty winds are
most likely near thunderstorms.

Valle

&&

.FIRE WEATHER...Wet conditions will persist for the next week and
beyond. Memorial Day looks quite wet across central and eastern
Idaho as low pressure shifts across the state. Storm after storm
will keep showers and thunderstorms in the forecast into the first
several days of June. After tomorrow, expect a slow warming trend
even with clouds and precipitation hanging around.  Keyes

&&

.HYDROLOGY...Periods of rain are expected to continue the next
several days in southeast Idaho. Will be more widespread this
evening and Monday with a bit of a break Sunday. A Flood Advisory
remains in effect for the Big Wood River at Hailey as it
continued to rise and is expected to peak Tuesday into Wednesday
but remain just below minor flood stage but expect continued
nuisance water encroachment along the river. GK

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
None.
&&

In the hours before

Local storm report, May 26, 12:54 PM MDT, 1 hour 11 minutes before

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Special weather statement, May 26, 1:02 PM MDT, 1 hour 3 minutes before

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Local storm report, May 26, 1:30 PM MDT, 35 minutes before

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Special weather statement, May 26, 1:31 PM MDT, 34 minutes before

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Special weather statement, May 26, 1:43 PM MDT, 22 minutes before

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Local storm report, May 26, 1:47 PM MDT, 18 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 11:53 AM MDT	Special Weather Statement	PIH	Camas	67 min
May 26, 12:11 PM MDT	Severe Thunderstorm Warning	PIH	Blaine	49 min
May 26, 1:02 PM MDT	Special Weather Statement	PIH	Power	43 min
May 26, 1:31 PM MDT	Special Weather Statement	PIH	Bingham	44 min
May 26, 1:43 PM MDT	Special Weather Statement	PIH	Blaine	62 min
May 26, 2:22 PM MDT	Special Weather Statement	PIH	Bingham	38 min
May 26, 2:24 PM MDT	Special Weather Statement	PIH	Clark	51 min
May 26, 2:30 PM MDT	Severe Thunderstorm Warning	PIH	Butte, Clark, Jefferson	30 min
May 26, 2:53 PM MDT	Special Weather Statement	PIH	Jefferson	52 min
May 26, 3:02 PM MDT	Special Weather Statement	PIH	Fremont	28 min
May 26, 3:15 PM MDT	Special Weather Statement	PIH	Jefferson	45 min
May 26, 3:32 PM MDT	Special Weather Statement	PIH	Clark	43 min
May 26, 3:38 PM MDT	Special Weather Statement	PIH	Bonneville	52 min
May 26, 3:51 PM MDT	Special Weather Statement	PIH	Bingham	39 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2019 Every severe thunderstorm warning in 2019

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.