Alert archive / Idaho / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 27, NWS Spokane, WA

July 20, 1995Clearwater County, Idaho County, Idaho

NWS Spokane, WA issued this severe thunderstorm warning at Jul 20, 1995, 6:52 PM PDT for Clearwater County, Idaho County, Idaho. It was in force for 38 min.

The area

The counties it named.

The facts

Issued
Jul 20, 1995, 6:52 PM PDT (01:52 UTC)
Expired
Jul 20, 1995, 7:30 PM PDT
In force
38 min
Issued by
NWS Spokane, WA
Area
Whole counties

Counties Clearwater County, ID, Idaho County, ID

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 1.9 hours before the alert went out and 172 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 1995-07-21Temperature 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 1995-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.1939Sfc1 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
3292 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
48 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 
TTAA00 KBOI 210152 RRA
SVRLWS
IDC035-049-210230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BOISE ID
652 PM PDT THU JUL 20 1995
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  730 PM PDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTH CENTRAL IDAHO
 
   ...EASTERN CLEARWATER COUNTY...NORTHEASTERN IDAHO COUNTY
 
AT 645 PM PDT MISSOULA RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
FROM 15 MILES EAST OF HEADQUARTERS IN CLEARWATER COUNTY TO 20 MILES
SOUTH OF LOLO PASS IN NORTHEAST IDAHO COUNTY.  THE STORMS WERE
MOVING EAST AT ABOUT 10 MPH.
 
THESE STORMS ARE CAPABLE OF PRODUCING LARGE HAIL...DAMAGING WINDS
AND VERY HEAVY RAIN IN THE NORTH FORK OF THE CLEARWATER DRAINAGE...
THE LOCHSA RIVER DRAINAGE ABOVE LOWELL AND IN THE NORTHERN SELWAY-
BITTERROOT WILDERNESS AREA UNTIL 730 PM PDT.
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING. d DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 5:47 PM PDTSevere Thunderstorm WarningOTXClearwater, Idaho58 min

Nearby

Severe Thunderstorm Warnings in Idaho, 1995Every severe thunderstorm warning in 1995

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.