Alert archive / Idaho / Tornado Warnings in 1997

Tornado Warning 6, NWS Pocatello, ID

July 10, 1997Cassia County, Idaho

NWS Pocatello, ID issued this tornado warning at Jul 10, 1997, 3:17 PM MDT for Cassia County, Idaho. It was in force for 43 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 10, 1997, 3:17 PM MDT (21:17 UTC)
Expired
Jul 10, 1997, 4:00 PM MDT
In force
43 min
Issued by
NWS Pocatello, ID
Area
Whole counties

County Cassia County, ID

The radar

The Pocatello radar (KSFX), 118 km from the middle of the area, began a volume at 21:20 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
Jul 10, 3:40 PM MDTHail 1Strevell, ID

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Elko, NV (KLKN), launched 12:00Z, 9.3 hours before the alert went out and 165 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 1997-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 218 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 1997-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
218 J/kg
Mixed-layer CIN
-141 J/kg
Mixed-layer LCL
1723 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
91 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

592 
WFUS1 KPIH 102123 RRA
TORPIH
IDC031-102200-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE POCATELLO ID
317 PM MDT THU JUL 10 1997
 
THE NATIONAL WEATHER SERVICE IN POCATELLO HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  400 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN SOUTHEAST IDAHO
 
   ...SOUTHEASTERN CASSIA COUNTY
 
AT 315 PM DOPPLER WEATHER RADAR INDICATED A TORNADO WAS FORMING ALONG
THE IDAHO...UTAH BORDER ABOUT 15 MILES SOUTHWEST OF BRIDGE OR 20 MILES
WEST OF STREVELL. THIS IS AN EXTREMELY DANGEROUS STORM AND IS MOVING
NORTHEAST AT 15 MPH. EXPECT GOLF BALL SIZE OR LARGER HAIL...AND VERY
HEAVY RAIN.
 
IF YOU ARE IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND
OR A SMALL INTERIOR ROOM AND AVOID WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 2:36 PM MDTSevere Thunderstorm WarningPIHPower39 min
Jul 10, 3:36 PM MDTSevere Thunderstorm WarningPIHCaribou39 min
Jul 10, 3:54 PM MDTSevere Thunderstorm WarningPIHCassia, Oneida36 min

Nearby

Tornado Warnings in Idaho, 1997Every tornado warning in 1997Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.