Alert archive / Idaho / Tornado Warnings in 1986

Tornado Warning 1, NWS Spokane, WA

September 14, 1986Benewah County, Idaho

NWS Spokane, WA issued this tornado warning at Sep 14, 1986, 7:40 PM PDT for Benewah County, Idaho. It was in force for 80 min.

The area

The counties it named.

The facts

Issued
Sep 14, 1986, 7:40 PM PDT (02:40 UTC)
Expired
Sep 14, 1986, 9:00 PM PDT
In force
80 min
Issued by
NWS Spokane, WA
Area
Whole counties

County Benewah County, ID

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 2.7 hours before the alert went out and 57 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, Spokane, WA at 00:00Z on 1986-09-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Spokane, WA at 00:00Z on 1986-09-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 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
3519 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-25 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.

000 
TTAAOO KGEG 150232 RRA
TORGEG
IDC009-150330-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
740 PM PDT SUN SEP 14 1986
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL  900 PM PDT FOR PEOPLE IN THE FOLLOWING COUNTIES:
 
IN NORTH IDAHO
          ..BENEWAH

A FUNNEL CLOUD WAS SPOTTED NEAR THE NORTH IDAHO TOWN OF TENSED AT 700
PM PDT BY A WEATHER SPOTTER. THERE WAS ANOTHER REPORT LATER OF A
TORNADO TOUCHING DOWN IN A PLOWED FIELD 2 MILES EAST OF FARMINGTON,
WA. SCATTERED THUNDERSTORMS WILL BE OCCURING FOR THE NEXT ONE TO TWO
HOURS IN BENEWAH COUNTY.
IF YOU ARE CAUGHT OUTSIDE, SEEK SHELTER IN A NEARBY REINFOLRCED
BUILDING.  AS A LAST RESORT, SEEK SHELTER IN A CULVERT, DITCH OR
LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

Nearby

Tornado Warnings in Idaho, 1986Every tornado warning in 1986Tornadoes in 1986

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.