Alert archive / Idaho / Flash Flood Warnings in 1991

Flash Flood Warning 1, NWS Spokane, WA

June 20, 1991Clearwater County, Latah County, Shoshone County, Idaho

NWS Spokane, WA issued this flash flood warning at Jun 20, 1991, 1:08 AM PDT for Clearwater County, Latah County, Shoshone County, Idaho. It was in force for 82 min.

The area

The counties it named.

The facts

Issued
Jun 20, 1991, 1:08 AM PDT (08:08 UTC)
Expired
Jun 20, 1991, 2:30 AM PDT
In force
82 min
Issued by
NWS Spokane, WA
Area
Whole counties

Counties Clearwater County, ID, Latah County, ID, Shoshone County, ID

The nearest sounding before it

Spokane Intl Airport, WA (KGEG), launched 00:00Z, 8.1 hours before the alert went out and 131 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 Intl Airport, WA at 00:00Z on 1991-06-20Temperature 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 Intl Airport, WA at 00:00Z on 1991-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 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
1426 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
198 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 1:08 AM PDTFlash Flood WarningOTXBenewah82 min

Nearby

Flash Flood Warnings in Idaho, 1991Every flash flood warning in 1991

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.