Alert archive / Montana / Flash Flood Warnings in 1996

Flash Flood Warning 2, NWS Missoula, MT

July 29, 1996Silver Bow County, Montana

NWS Missoula, MT issued this flash flood warning at Jul 29, 1996, 4:26 PM MDT for Silver Bow County, Montana. It was in force for 3 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 29, 1996, 4:26 PM MDT (22:26 UTC)
Expired
Jul 29, 1996, 7:30 PM MDT
In force
3 hr
Issued by
NWS Missoula, MT
Area
Whole counties

County Silver Bow County, MT

The radar

The Missoula radar (KMSX), 162 km from the middle of the area, began a volume at 22:30 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 12:00Z, 10.4 hours before the alert went out and 234 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 12:00Z on 1996-07-29Temperature 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, Great_falls, MT at 12:00Z on 1996-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -44 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
2514 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-44 m²/s²
0-3 km storm-relative helicity
-5 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 KMSO 292227
FFWMSO
MTC093-300130-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
426 PM MDT MON JUL 29 1996
 
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  730 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHWEST MONTANA
 
   ...SILVER BOW COUNTY
 
HEAVY RAIN OVER THE PAST HOUR HAS CREATED FLASH FLOODING CONDITIONS
ALONG BASIN CREEK SOUTH OF BUTTE. SPOTTERS REPORT THAT FLOODING IS
OCCURRING AND IS IN DANGER OF WASHING AWAY A BRIDGE ALONG BASIN CREEK 7
MILES SOUTH OF BUTTE. DOPPLER RADAR ESTIMATES THAT OVER 1 AND 1/2 INCHES
OF RAIN HAVE FALLEN IN THIS AREA.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THEZ WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
END/BARKER
 
&

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 1:10 PM MDTSevere Thunderstorm WarningMSOBeaverhead, Deer Lodge, Silver Bow65 min
Jul 29, 3:18 PM MDTSevere Thunderstorm WarningMSOSilver Bow57 min

Nearby

Flash Flood Warnings in Montana, 1996Every flash flood warning in 1996

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.