Alert archive / Montana / Flash Flood Warnings in 2004

Flash Flood Warning 3, NWS Great Falls, MT

June 29, 2004Lewis and Clark County, Montana

NWS Great Falls, MT issued this flash flood warning at Jun 29, 2004, 6:15 PM MDT for Lewis and Clark County, Montana. It was in force for 105 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
Jun 29, 2004, 6:15 PM MDT (00:15 UTC)
Expired
Jun 29, 2004, 8:00 PM MDT
In force
105 min
Issued by
NWS Great Falls, MT
Area
Counties, with a storm outline in the text

County Lewis and Clark County, MT

The radar

The Missoula radar (KMSX), 99 km from the middle of the area, began a volume at 00:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 0.3 hours before the alert went out and 161 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, Great_falls, MT at 00:00Z on 2004-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 143 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, Great_falls, MT at 00:00Z on 2004-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -19 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
143 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
2411 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
-19 m²/s²
0-3 km storm-relative helicity
33 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 KTFX 300047 CCA
FFWTFX
MTC049-300200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTED EXPIRATION TIME
NATIONAL WEATHER SERVICE GREAT FALLS MT
615 PM MDT TUE JUN 29 2004

THE NATIONAL WEATHER SERVICE IN GREAT FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR THE SNOW TALON BURN AREA IN THE COPPER     
  CREEK CANYON NORTHEAST OF LINCOLN IN CENTRAL LEWIS AND CLARK       
  COUNTY OF WEST CENTRAL MONTANA

* UNTIL 800 PM MDT

* AT 605 PM MDT...THUNDERSTORMS WITH VERY HEAVY RAIN WERE OVER THE
  COPPER CREEK CANYON. LITTLE MOVEMENT WAS OBSERVED WITH THESE
  THUNDERSTORMS. RAINFALL OF OVER ONE INCH PER HOUR IS LIKELY
  ALONG WITH FREQUENT CLOUD TO GROUND LIGHTNING AND SMALL HAIL.

* THE THUNDERSTORMS ARE EXPECTED TO REMAIN OVER THE BURN AREA        
  THROUGH 700 PM. 

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN 
THE WARNED AREA. FLASH FLOODING OF STREAMS AND DEBRIS FLOWS
ARE POSSIBLE AS A RESULT OF THE HEAVY RAIN IN THE BURN AREA.

LAT...LON 4713 11284 4701 11265 4716 11244 4728 11265

$$

Nearby

Flash Flood Warnings in Montana, 2004Every flash flood warning in 2004

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; radar from the NEXRAD Level II archive.