Alert archive / Montana / Flash Flood Warnings in 2001

Flash Flood Warning 2, NWS Missoula, MT

July 15, 2001Ravalli County, Montana

NWS Missoula, MT issued this flash flood warning at Jul 15, 2001, 3:31 PM MDT for Ravalli County, Montana. It was in force for 2 hr. 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 15, 2001, 3:31 PM MDT (21:31 UTC)
Expired
Jul 15, 2001, 6:00 PM MDT
In force
2 hr
Issued by
NWS Missoula, MT
Area
Whole counties

County Ravalli County, MT

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 9.5 hours before the alert went out and 250 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 2001-07-15Temperature 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 12:00Z on 2001-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 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
2345 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
39 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 152137
FFWMSO

MTC-081-160000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
331 PM MDT SUN JUL 15 2001

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

* FLASH FLOOD WARNING FOR DICKSON...LAIRD...NORTH FORK               
  RYE...SLEEPING AND LITTLE SLEEPING CHILD CREEKS...
  SOUTHERN RAVALLI COUNTY IN WEST CENTRAL MONTANA 

* UNTIL 600 PM MDT

* AT 331 PM MDT...RADAR INDICATED AND SPOTTERS CONFIRMED             
  THUNDERSTORMS WITH VERY HEAVY RAINFALL 14 MILES NORTHEAST OF       
  CONNER...OR 20 MILES SOUTHEAST OF HAMILTON...MOVING NORTHEAST AT   
  20 MPH. 

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.

THIS STORM PRODUCED ONE HALF AN INCH OF ^RAIN IN ONE HALF HOUR IN THE 
TOWN OF CONNER AT 330 PM PDT. 

CAMPING SHOULD BE AVOIDED ALONG CREEKS OR STREAMS DURING THREATENING
RAINS. EVEN SMALL STREAMS CAN BE DEADLY TORRENTS OF WATER DURING A
FLASH FLOOD.

NESTER

The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 15, 4:20 PM MDTSevere Thunderstorm WarningMSOMissoula30 min
Jul 15, 4:31 PM MDTSevere Thunderstorm WarningMSOGranite44 min

Nearby

Flash Flood Warnings in Montana, 2001Every flash flood warning in 2001

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.