Alert archive / Idaho / Flash Flood Warnings in 1998

Flash Flood Warning 8, NWS Spokane, WA

July 30, 1998Bonner County, Boundary County, Idaho; Pend Oreille County, Washington

NWS Spokane, WA issued this flash flood warning at Jul 30, 1998, 2:19 PM PDT for Bonner County, Boundary County, Idaho; Pend Oreille County, Washington. It was in force for 96 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 30, 1998, 2:19 PM PDT (21:19 UTC)
Expired
Jul 30, 1998, 3:55 PM PDT
In force
96 min
Issued by
NWS Spokane, WA
Area
Whole counties

Counties Bonner County, ID, Boundary County, ID, Pend Oreille County, WA

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 9.3 hours before the alert went out and 97 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 12:00Z on 1998-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 8 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, Spokane, WA at 12:00Z on 1998-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 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
8 J/kg
Mixed-layer CIN
-342 J/kg
Mixed-layer LCL
1869 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
43 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 KGEG 302123
FFWGEG
IDC017-021-WAC051-302255-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
219 PM PDT THU JUL 30 1998

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BONNER COUNTY IN NORTHERN IDAHO
  BOUNDARY COUNTY IN NORTHERN IDAHO
  PEND ORIELLE COUNTY IN NORTHEASTERN WASHINGTON

* UNTIL 355 PM PDT

* AT 215 PM PDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A THUNDERSTORM WITH VERY HEAVY RAIN BETWEEN DIAMOND LAKE AND
  SANDPOINT, AND NEAR METALINE FALLS.... MOVING SLOWLY NORTH.

* THUNDERSTORMS WILL PRODUCE SMALL HAIL AND VERY HEAVY RAIN.
  FLOODING OF DITCHES AND ROADWAYS IS LIKELY.

DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

BA

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 1:25 PM PDTFlash Flood WarningOTXShoshone95 min
Jul 29, 6:44 PM PDTFlash Flood WarningOTXLincoln2 hr
Jul 30, 1:20 PM PDTSevere Thunderstorm WarningOTXPend Oreille50 min

Nearby

Flash Flood Warnings in Idaho, 1998Flash Flood Warnings in Washington, 1998Every flash flood warning 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.