Alert archive / Idaho / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Pocatello, ID

May 26, 2018Blaine County, Cassia County, Minidoka County, Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at May 26, 2018, 4:36 PM MDT for Blaine County, Cassia County, Minidoka County, Idaho. It was in force for 24 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 26, 2018, 4:36 PM MDT (22:36 UTC)
Expired
May 26, 2018, 5:00 PM MDT
In force
24 min
Issued by
NWS Pocatello, ID
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Blaine County, ID, Cassia County, ID, Minidoka County, ID

The radar

The Pocatello radar (KSFX), 90 km from the middle of the area, began a volume at 22:38 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.

What was reported inside it

TimeReportWhereRemark
May 26, 4:38 PM MDTHAIL 0.51 S Rupert, IDREPORTED VIA KMVT FACEBOOK LIVE FEED.
May 26, 4:41 PM MDTHAIL 0.883 E Rupert, ID

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Elko, NV (KLKN), launched 12:00Z, 10.6 hours before the alert went out and 205 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, Elko, NV at 12:00Z on 2018-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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, Elko, NV at 12:00Z on 2018-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.19395878Sfc1 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
6 J/kg
Mixed-layer CIN
-159 J/kg
Mixed-layer LCL
1235 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

066 
WUUS55 KPIH 262236
SVRPIH
IDC013-031-067-262300-
/O.NEW.KPIH.SV.W.0021.180526T2236Z-180526T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pocatello ID
436 PM MDT SAT MAY 26 2018

The National Weather Service in Pocatello has issued a

* Severe Thunderstorm Warning for...
  Southern Blaine County in central Idaho...
  North central Cassia County in southeastern Idaho...
  Southern Minidoka County in south central Idaho...

* Until 500 PM MDT

* At 436 PM MDT, a severe thunderstorm was located over Rupert,
  moving north at 40 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Rupert, Heyburn, Lake Walcott, Paul, Declo, Minidoka and Acequia. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4248 11366 4263 11386 4292 11356 4280 11331
TIME...MOT...LOC 2236Z 194DEG 34KT 4263 11367 

HAIL...1.00IN
WIND...60MPH
 
$$

JKEYES
2 follow-up statements
899 
WWUS55 KPIH 262248
SVSPIH

Severe Weather Statement
National Weather Service Pocatello ID
448 PM MDT SAT MAY 26 2018

IDC013-031-067-262300-
/O.CON.KPIH.SV.W.0021.000000T0000Z-180526T2300Z/
Blaine ID-Cassia ID-Minidoka ID-
448 PM MDT SAT MAY 26 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM MDT
FOR SOUTHERN BLAINE...NORTHERN CASSIA AND SOUTHEASTERN MINIDOKA
COUNTIES...

At 447 PM MDT, a severe thunderstorm was located just northeast of 
Acequia, moving north at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. Nickel size hail was reported with the 
         storm in Rupert. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Rupert, Minidoka and Acequia. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4258 11361 4265 11383 4292 11356 4280 11331
TIME...MOT...LOC 2247Z 191DEG 28KT 4271 11364 

HAIL...1.00IN
WIND...60MPH
 
$$

JKEYES
514 
WWUS55 KPIH 262259
SVSPIH

Severe Weather Statement
National Weather Service Pocatello ID
459 PM MDT SAT MAY 26 2018

IDC013-031-067-262309-
/O.EXP.KPIH.SV.W.0021.000000T0000Z-180526T2300Z/
Blaine ID-Cassia ID-Minidoka ID-
459 PM MDT SAT MAY 26 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BLAINE...NORTHERN
CASSIA AND SOUTHEASTERN MINIDOKA COUNTIES WILL EXPIRE AT 500 PM
MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However small hail,
gusty winds and heavy rain are still possible with this thunderstorm.

LAT...LON 4258 11361 4265 11383 4292 11356 4280 11331
TIME...MOT...LOC 2259Z 194DEG 34KT 4281 11361 

$$

JKEYES

The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 5:30 AM MDTRiver Flood WarningPIHCuster3 days
May 26, 5:30 AM MDTRiver Flood WarningPIHBlaine4 days
May 26, 1:22 PM MDTSpecial Weather StatementPIHCuster38 min
May 26, 2:02 PM MDTSpecial Weather StatementPIHCuster43 min
May 26, 2:49 PM MDTSpecial Weather StatementPIHCassia41 min
May 26, 3:27 PM MDTSevere Thunderstorm WarningPIHCassia, Minidoka33 min
May 26, 3:58 PM MDTSevere Thunderstorm WarningPIHCassia, Lincoln, Minidoka32 min
May 26, 4:29 PM MDTSevere Thunderstorm WarningPIHLincoln, Minidoka31 min
May 26, 5:10 PM MDTSpecial Weather StatementPIHMinidoka35 min
May 26, 5:38 PM MDTSpecial Weather StatementPIHBlaine52 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.