Alert archive / Idaho / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 13, NWS Boise, ID

May 6, 1998Jerome County, Twin Falls County, Idaho

NWS Boise, ID issued this severe thunderstorm warning at May 6, 1998, 6:06 PM MDT for Jerome County, Twin Falls County, Idaho. It was in force for 59 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 6, 1998, 6:06 PM MDT (00:06 UTC)
Expired
May 6, 1998, 7:05 PM MDT
In force
59 min
Issued by
NWS Boise, ID
Area
Whole counties

Counties Jerome County, ID, Twin Falls County, ID

The radar

The Pocatello radar (KSFX), 159 km from the middle of the area, began a volume at 00:08 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 00:00Z, 0.1 hours before the alert went out and 183 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 00:00Z on 1998-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 620 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 00:00Z on 1998-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 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
620 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
1764 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
24 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.

189 
WUUS1 KBOI 070005 RRA
SVRBOI
IDC053-083-070105-

BULLETIN -- IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BOISE ID
606 PM MDT WED MAY 6 1998

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR:
  JEROME COUNTY - SOUTH CENTRAL IDAHO
  EASTERN TWIN FALLS COUNTY - SOUTH CENTRAL IDAHO

* UNTIL 705 PM MDT

* AT 601 PM MDT... A SEVERE THUNDERSTORM WAS INDICATED 16 MILES
  EAST OF TWIN FALLS OR 8 MILES NORTH OF MURTAUGH... BY BOISE
  DOPPLER RADAR... MOVING SOUTHWEST 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MURTAUGH AT 620 PM MDT
  KIMBERLY AT 640 PM MDT
  TWIN FALLS AT 645 PM MDT
  ROCK CREEK AT 650 PM MDT

WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING AWAY FROM WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 6:35 PM MDTSevere Thunderstorm WarningBOIBoise60 min
May 6, 7:33 PM MDTSevere Thunderstorm WarningBOIBoise62 min
May 6, 8:32 PM MDTSevere Thunderstorm WarningBOIBoise63 min

Nearby

Severe Thunderstorm Warnings in Idaho, 1998Every severe thunderstorm warning in 1998

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.