Alert archive / Idaho / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 13, NWS Pocatello, ID

May 31, 1997Blaine County, Idaho

NWS Pocatello, ID issued this severe thunderstorm warning at May 31, 1997, 3:28 PM MDT for Blaine County, Idaho. It was in force for 32 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 31, 1997, 3:28 PM MDT (21:28 UTC)
Expired
May 31, 1997, 4:00 PM MDT
In force
32 min
Issued by
NWS Pocatello, ID
Area
Whole counties

County Blaine County, ID

The radar

The Pocatello radar (KSFX), 110 km from the middle of the area, began a volume at 21:30 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 31, 2:30 PM MDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Boise Airport, ID (KBOI), launched 12:00Z, 9.5 hours before the alert went out and 180 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, Boise Airport, ID at 12:00Z on 1997-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 347 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Boise Airport, ID at 12:00Z on 1997-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 230 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
347 J/kg
Mixed-layer CIN
-231 J/kg
Mixed-layer LCL
2502 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
230 m²/s²
0-3 km storm-relative helicity
257 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPIH 312133 RRA
SVRPIH
IDC013-312200-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE POCATELLO ID
328 PM MDT SAT MAY 31 1997
 
THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  400 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN EAST CENTRAL IDAHO
 
   ...SOUTHERN BLAINE COUNTY
 
A SEVERE THUNDERSTORM WAS LOCATED 7 MILES EAST OF MINIDOKA MOVING NORTHE
TMPH. THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL AND HEAVY RAIN AND
WILL MOVE ALONG THE BLAINE AND POWER COUNTY LINE BETWEEN NOW AND 400 PM.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
FREQUENT LIGHTNING.

The office that day

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

IssuedProductOfficeCountiesLasted
May 31, 2:26 PM MDTSevere Thunderstorm WarningPIHCuster49 min
May 31, 2:39 PM MDTSevere Thunderstorm WarningPIHBlaine51 min
May 31, 2:44 PM MDTSevere Thunderstorm WarningPIHMinidoka46 min
May 31, 3:20 PM MDTSevere Thunderstorm WarningPIHCuster40 min
May 31, 3:42 PM MDTSevere Thunderstorm WarningPIHBingham, Power48 min
May 31, 3:49 PM MDTSevere Thunderstorm WarningPIHButte26 min
May 31, 3:53 PM MDTSevere Thunderstorm WarningPIHCassia37 min
May 31, 4:05 PM MDTSevere Thunderstorm WarningPIHBannock, Bingham40 min
May 31, 4:14 PM MDTSevere Thunderstorm WarningPIHPower31 min
May 31, 4:19 PM MDTTornado WarningPIHButte26 min
May 31, 4:38 PM MDTSevere Thunderstorm WarningPIHBingham37 min
May 31, 4:42 PM MDTSevere Thunderstorm WarningPIHCassia33 min
May 31, 4:52 PM MDTTornado WarningPIHBannock, Bingham38 min
May 31, 5:02 PM MDTTornado WarningPIHJefferson28 min
May 31, 5:09 PM MDTSevere Thunderstorm WarningPIHBingham36 min
May 31, 5:21 PM MDTTornado WarningPIHBannock39 min
May 31, 5:26 PM MDTTornado WarningPIHJefferson19 min
May 31, 5:35 PM MDTSevere Thunderstorm WarningPIHOneida25 min
May 31, 5:38 PM MDTSevere Thunderstorm WarningPIHCassia37 min
May 31, 5:48 PM MDTSevere Thunderstorm WarningPIHCaribou27 min

Nearby

Severe Thunderstorm Warnings in Idaho, 1997Every severe thunderstorm warning in 1997

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.