Alert archive / Washington / Tornado Warnings in 1998

Tornado Warning 5, NWS Spokane, WA

July 10, 1998Spokane County, Washington

NWS Spokane, WA issued this tornado warning at Jul 10, 1998, 11:12 PM PDT for Spokane County, Washington. It was in force for 48 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: Jul 10, 1998, 11:12 PM PDT (06:12 UTC)
Expired: Jul 11, 1998, 12:00 AM PDT
In force: 48 min
Issued by: NWS Spokane, WA
Area: Whole counties

County Spokane County, WA

The radar

The Spokane radar (KOTX), 18 km from the middle of the area, began a volume at 06:12 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.

Issued	Product	Office	Lasted
Jul 10, 9:00 PM PDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 6.2 hours before the alert went out and 76 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 199 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1962 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 97 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.

396 
WFUS1 KGEG 110611 RRA
TORGEG
WAC063-110700-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
1112 PM PDT FRI JUL 10 1998

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN SPOKANE COUNTY IN EAST CENTRAL WASHINGTON

* UNTIL MIDNIGHT PDT

* AT 1111 PM PDT... SEVERE WEATHER 18 MILES NORTH OF SPOKANE OR 8
  MILES EAST OF DEER PARK... WAS REPORTED BY SPOTTERS... MOVING
  NORTHEAST 25 MPH.

* THE TORNADO IS EXPECTED TO REMAIN OVER RURAL AREAS.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

BA/DR

The office that day

Everything else NWS Spokane, WA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 7:23 PM PDT	Severe Thunderstorm Warning	OTX	Asotin	62 min
Jul 10, 7:41 PM PDT	Severe Thunderstorm Warning	OTX	Grant	64 min
Jul 10, 7:56 PM PDT	Severe Thunderstorm Warning	OTX	Adams	64 min
Jul 10, 8:40 PM PDT	Severe Thunderstorm Warning	OTX	Lincoln	65 min
Jul 10, 8:47 PM PDT	Severe Thunderstorm Warning	OTX	Grant	48 min
Jul 10, 9:11 PM PDT	Tornado Warning	OTX	Adams	64 min
Jul 10, 9:19 PM PDT	Severe Thunderstorm Warning	OTX	Ferry, Okanogan	61 min
Jul 10, 9:33 PM PDT	Severe Thunderstorm Warning	OTX	Lincoln, Spokane	62 min
Jul 10, 10:32 PM PDT	Severe Thunderstorm Warning	OTX	Lincoln, Spokane, Stevens	63 min
Jul 10, 11:33 PM PDT	Severe Thunderstorm Warning	OTX	Pend Oreille, Spokane	67 min
Jul 11, 12:00 AM PDT	Tornado Warning	OTX	Pend Oreille, Spokane	60 min

Nearby

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