Alert archive / Montana / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 2, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jun 24, 1999, 5:48 PM MDT for Flathead County, Lake County, Sanders County, Montana. It was in force for 42 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 24, 1999, 5:48 PM MDT (23:48 UTC)
- Expired
- Jun 24, 1999, 6:30 PM MDT
- In force
- 42 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
Counties Flathead County, MT, Lake County, MT, Sanders County, MT
The radar
The Missoula radar (KMSX), 98 km from the middle of the area, began a volume at 23:50 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 24, 5:48 PM MDT | Hail 0.75 | Paradise, MT | |
| Jun 24, 6:23 PM MDT | Hail 0.75 | Round Butte, MT |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 11.8 hours before the alert went out and 149 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
- 7 J/kg
- Mixed-layer CIN
- -273 J/kg
- Mixed-layer LCL
- 1458 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSO 242350 RRA SVRMSO MTC029-047-089-250030- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 548 PM MDT THU JUN 24 1999 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN LAKE COUNTY IN NORTHWEST MONTANA SOUTH CENTRAL FLATHEAD COUNTY IN NORTHWEST MONTANA EAST CENTRAL SANDERS COUNTY IN WEST CENTRAL MONTANA * UNTIL 630 PM MDT * AT 548 PM MDT...SPOTTERS REPORTED A SEVERE THUNDERSTORM WITH 3/4 INCH DIAMETER HAIL ABOUT 2 MILES NORTHWEST OF PARADISE...OR 15 MILES NORTH OF SUPERIOR...MOVING NORTHEAST AT 45 MPH. * THE SEVERE THUNDERSTORM WILL BE... 3 MILES SOUTHEAST OF BIG ARM...6 MILES NORTHWEST OF POLSON AT 625 PM MDT LARGE HAIL IS LIKELY WITH THIS SEVERE THUNDERSTORM. DAMAGING STRONG WINDS IN EXCESS OF 55 MPH ARE POSSIBLE ALONG WITH DEADLY LIGHTNING AND HEAVY RAINFALL. FOR YOUR PROTECTION...STAY INDOORS AWAY FROM WINDOWS. LAT...L ON 4750 11489 4737 11471 4793 11366 4814 11393
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 24, 2:30 PM MDT, 3 hours 18 minutes earlier.
Area forecast discussion, Jun 24, 2:30 PM MDT, 3 hours 18 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 230 PM MDT THU JUN 24 1999 LATEST SATELLITE AND 88D LOOPS SHOWING AN AREA OF CONVECTION DEVELOPING OVER IDAHO ZONES 5 AND 6 AS WELL AS EASTERN OREGON/WASHINGTON. MODELS IN GOOD AGREEMENT WITH THUNDERSTORM EVENT THIS AFTERNOON AND EVENING ACROSS MUCH OF CWA. BEST POTENTIAL FOR STRONG TO SEVERE STORMS APPEARS TO BE OVER EASTERN WASHINGTON/OREGON AND NORTHERN IDAHO EARLY AND POSSIBLY LATER IN NORTHWEST MONTANA AND CENTRAL IDAHO. LI OF -3 TO -4...CAPE NEAR 1000 J/KG AND LOW LEVEL SHEAR MAY SUPPORT STRONG STORMS AND ISOLATED SEVERE STORMS IN THOSE AREAS LATE THIS AFTERNOON AND EVENING. A COOL SHOWER REGIME CONTINUES FOR FRIDAY AND SATURDAY AS MAIN UPPER TROUGH REMAINS OVER CWA. SO WILL GO WITH COOLER TEMPERATURES AND LOW POPS. MATHEWSON EXTENDED...MRF/UK SIMILAR SOLUTIONS AND PREFERRED. UPPER TROF EXITING SUNDAY MORNING WITH AMPLIFYING RIDGING MAINTAINING DRYING OVER WESTERN MONTANA THROUGH DAY 4. ON DAY 5..NEXT S/W OVER NORTHWEST PROVIDING WARMING TEMPS AND A SLIGHT CHANCE OF MOUNTAIN SHOWERS NORTH. STOLL
Nearby
Severe Thunderstorm Warnings in Montana, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.