Alert archive / Montana / Flash Flood Warnings in 2001
Flash Flood Warning 8, NWS Missoula, MT
NWS Missoula, MT issued this flash flood warning at Jul 21, 2001, 8:00 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 outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jul 21, 2001, 8:00 PM MDT (02:00 UTC)
- Expired
- Jul 21, 2001, 10:00 PM MDT
- In force
- 2 hr
- Issued by
- NWS Missoula, MT
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Ravalli County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 2.0 hours before the alert went out and 232 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.
- Mixed-layer CAPE
- 64 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 2067 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS55 KMSO 220202 FFWMSO MTC081-220400- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MISSOULA MT 800 PM MDT SAT JUL 21 2001 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS REISSUED A * FLASH FLOOD WARNING FOR THE SLEEPING CHILD CREEK...LITTLE SLEEPING CHILD CREEK...AND SKALKAHO CREEK... IN EASTERN RAVALLI COUNTY IN WEST CENTRAL MONTANA * UNTIL 1000 PM MDT * AT 800 PM MDT...RADAR INDICATED A STRONG THUNDERSTORM WITH VERY HEAVY RAINFALL 10 MILES EAST OF HAMILTON...MOVING NORTH AT 20 MPH. THIS STORM WILL MOVE ACROSS THE SLEEPING CHILD CREEK...LITTLE SLEEPING CHILD CREEK...AND SKALKAHO CREEK AREAS CREATING MORE WATER RUNOFF AND POSSIBLE MUDSLIDES. THE RIVER GAGE ON LAIRD CREEK NEAR SULA JUMPED TO 8.59 FEET AT 730 PM MDT. FLOODING AND MUDSLIDES HAD BEEN REPORTED IN THIS AREA EARLIER...HOWEVER WATER IS RECEDING AS OF 800 PM MDT. 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. CAMPING SHOULD BE AVOIDED ALONG CREEKS OR STREAMS DURING THREATENING RAINS. EVEN SMALL STREAMS CAN BE DEADLY TORRENTS OF WATER DURING A FLASH FLOOD. LAT...LON 4613 11413 4609 11387 4700 11345 4707 11396
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Missoula, MT wrote its last area forecast discussion before this flash flood warning went out at Jul 21, 1:50 PM MDT, 6 hours 10 minutes earlier.
Area forecast discussion, Jul 21, 1:50 PM MDT, 6 hours 10 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 150 PM MDT SAT JUL 21 2001 .SHORT TERM...AVN HANDLING EJECTING SHORTWAVE MOVING INTO SOUTHEAST OREGON AT BASE OF TROUGH BETTER THAN 12Z ETA. THIS FEATURE HOLDS TOGETHER INTO THE LATE EVENING TO ENHANCE CONVECTION CURRENTLY FIRING OVER SOUTHERN ZONES. PWATS DOWN FROM YESTERDAY AND STILL A LITTLE UNCERTAIN ABOUT MODEL DIFFERENCES THIS EVENING...SO NO FLASH FLOOD WATCH PLANNED. WITH DRIER AIR AROUND CLOUDBASE LEVEL AND LOWER WETBULB ZEROES...WILL THROW IN MENTION OF GUSTY WINDS AND HAIL FOR SOME AREAS. MORE DISORGANIZED SHORTWAVE ENERGY DROPPING DOWN FROM SOUTHWEST CANADA WILL KEEP SHOWERS AND A FEW THUNDERSTORMS GOING THROUGH THE MORNING ACROSS THE NORTHERN ZONES. FOR THE REMAINDER OF THE SHORT TERM...STILL DEALING WITH TROUGH FOR CONTINUED INSTABILITY AND WEAK DYNAMICS SUPPORTING SHOWERS AND THUNDERSTORMS. LITTLE BETTER CHANCE IN NORTHWEST MONTANA TOMORROW AS NORTHERN WAVE AXIS DROPS THROUGH...SO WILL GO CATEGORICAL CONVECTIVE WORDING THERE...OTHERWISE ISOLATED TO SCATTERED ACROSS THE BOARD. SIGLER .EXTENDED...WEAK TROUGH LIFTS NORTH DAY3/4 (TUE/WED) WITH RISING HEIGHTS AND WARMING TREND. WILL KEEP SLIGHT CHANCE POPS MENTIONED THROUGH DAY5 (THU) WITH MODELS ADVERTISING GENERAL TROFINESS OVER REGION. UPPER RIDGE OVER THE 4-CORNERS AREA RE-ESTABLISHING ITSELF TOWARD THE END OF THE PERIOD...FOR TYPICAL WARM DRY CONDITIONS. MSJ .MSO...NONE.
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 6:10 PM MDT | Flash Flood Warning | MSO | Ravalli | 110 min |
| Jul 21, 6:30 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Ravalli | 45 min |
| Jul 21, 6:53 PM MDT | Flash Flood Warning | MSO | Ravalli | 112 min |
| Jul 21, 7:08 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 52 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.