Alert archive / Montana / Flash Flood Warnings in 2003

Flash Flood Warning 1, NWS Missoula, MT

May 30, 2003Ravalli County, Montana

NWS Missoula, MT issued this flash flood warning at May 30, 2003, 9:43 PM MDT for Ravalli County, Montana. It was in force for 92 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 30, 2003, 9:43 PM MDT (03:43 UTC)
Expired
May 30, 2003, 11:15 PM MDT
In force
92 min
Issued by
NWS Missoula, MT
Area
Counties, with a storm outline in the text

County Ravalli County, MT

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 3.7 hours before the alert went out and 219 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 2003-05-31Temperature 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 2003-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 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
633 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-25 m²/s²
0-3 km storm-relative helicity
4 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 
WGUS55 KMSO 310344
FFWMSO
MTC081-310515-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
943 PM MDT FRI MAY 30 2003

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN RAVALLI COUNTY IN WEST CENTRAL MONTANA

* UNTIL 1115 PM MDT

* AT 943 PM MDT...SPOTTERS REPORTED STORMS WITH VERY HEAVY RAIN 
  FROM FLORENCE TO JUST NORTH OF VICTOR...MOVING SLOWLY TO THE EAST.

A FLASH FLOOD WARNING MEANS FLOODING IS IMMINENT OR OCCURRING. IF YOU
ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS
LIVING ALONG RIVERS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO
PROTECT LIFE AND PROPERTY. DO NOT CROSS FLOODED ROADWAYS.

RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF RESIDENTIAL
AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS DITCHES AND LOW
LYING AREAS.

LAT...LON 4643 11420 4644 11400 4657 11395 4663 11394
          4665 11396 4665 11412

Nearby

Flash Flood Warnings in Montana, 2003Every flash flood warning in 2003

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.