Alert archive / Idaho / Tornado Warnings in 1998

Tornado Warning 2, NWS Boise, ID

May 10, 1998Ada County, Idaho

NWS Boise, ID issued this tornado warning at May 10, 1998, 6:19 PM MDT for Ada County, Idaho. It was in force for 46 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 10, 1998, 6:19 PM MDT (00:19 UTC)
Expired
May 10, 1998, 7:05 PM MDT
In force
46 min
Issued by
NWS Boise, ID
Area
Whole counties

County Ada County, ID

The nearest sounding before it

Boise Airport, ID (KBOI), launched 00:00Z, 0.3 hours before the alert went out and 14 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 1998-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 1998-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -39 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
785 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-39 m²/s²
0-3 km storm-relative helicity
-11 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.

538 
WFUS1 KBOI 110021 RRA
TORBOI
IDC001-110105-

BULLETIN -- IMMEDIATE BROADCAST REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BOISE ID
619 PM MDT SUN MAY 10 1998

THE NATIONAL WEATHER SERVICE IN BOISE HAS ISSUED A

* TORNADO WARNING FOR:
  CENTRAL AND EAST CENTRAL ADA COUNTY - SOUTHWESTERN IDAHO

* UNTIL 705 PM MDT

* AT 616 PM MDT... A TORNADO WAS INDICATED 16 MILES SOUTHEAST OF
  BOISE OR 4 MILES NORTHWEST OF I-84 STAGE STOP... BY BOISE
  DOPPLER RADAR... MOVING WEST 5 MPH.

* NO CITIES ARE IN THE PROJECTED PATH OF THIS STORM.

A TORNADO WAS OBSERVED IN THIS LOCATION BY THE BOISE AIRPORT
TOWER AND THE NATIONAL WEATHER SERVICE EMPLOYEES FROM 540PM TO
610 PM. IF YOU ARE IN THE PATH OF A TORNADO... SEEK SHELTER IN A
BASEMENT OR IN AN INTERIOR ROOM ON THE LOWEST FLOOR.  AVOID
WINDOWS.

&

Nearby

Tornado Warnings in Idaho, 1998Every tornado warning in 1998Tornadoes 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.