Alert archive / Montana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 39, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 28, 1998, 2:31 PM MDT for Lincoln County, Montana. It was in force for 59 min. 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 28, 1998, 2:31 PM MDT (20:31 UTC)
- Expired
- Jul 28, 1998, 3:30 PM MDT
- In force
- 59 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Lincoln County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 8.5 hours before the alert went out and 119 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
- 128 J/kg
- Mixed-layer CIN
- -346 J/kg
- Mixed-layer LCL
- 2575 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
203 WUUS1 KMSO 282039 RRA SVRMSO MTC053-282130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 231 PM MDT TUE JUL 28 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN LINCOLN COUNTY IN NORTHWESTERN MONTANA * UNTIL 330 PM MDT * AT 230 PM MDT...A LINE OF SEVERE THUNDERSTORMS WAS INDICATED 10 MILES WEST OF FORTINE...SOUTH TO 15 MILES EAST OF LIBBY. THESE STORMS WERE MOVING SLOWLY TO THE NORTHEAST AT 5 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... EUREKA AT 300 PM MDT FORTINE AT 300 PM MDT THESE SEVERE THUNDERSTORMS WILL PRODUCE VERY HEAVY RAIN AND LARGE HAIL. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. FELSCH
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 Jul 28, 2:15 PM MDT, 16 minutes earlier.
Area forecast discussion, Jul 28, 2:15 PM MDT, 16 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 215 PM MDT TUE JUL 28 1998 VORT LOBE ABSENT IN MODELS WHERE WATER VAPOR SHOWS OVER OREGON. BUT IT IS BEING SHEARED WESTWARD AND WILL BE NON-FACTOR FOR CWA EXCEPT MAYBE FOR WEST BOUNDARY OF WEST CENTRAL ID BY EVE. CONVECTION INCREASING UNDERNEATH AND AHEAD OF THE ID PANHANDLE UPPER TROUGH THEN MODELS SHOW DEEPEST MOISTURE RETREATING TO NEAR DIVIDE AFTER THE TROUGH PASSES BY WED MORNING. THEY IMPLY BEST DYNAMICS BY THIS EVE WILL BE IN SOUTHEAST B.C. AND ALSO TOWARD YELLOWSTONE. FIGURE THE RAIN WILL END FIRST IN NORTH CENTRAL ID AND LAST FOR BTM BY MIDNIGHT OR LATER. BUT 8H TROUGH TO SET UP TONIGHT BETWEEN MSO AND DIVIDE AND COULD KEEP CONVECTION GOING LONGER. THIS TROUGH MIGRATES WESTWARD WITHOUT THE EAST-OF-THE-DIVIDE MOISTURE AS THE UPPER LOW NEAR 40N/131W MOVES ONSHORE THU. MODELS AGREE WELL THIS POINT AND WILL NOT FIGHT IT. EASTERLY WINDS POSSIBLE ON WED NIGHT/FRI BUT SURFACE GRADIENT QUESTIONABLE ATTM AND WILL NOT MENTION WIND. MOS/ AVN GUIDANCE NUMBERS ARE VERY CLOSE AND YESTERDAYS MOS IS VERIFYING WELL ATTM. WILL STICK CLOSE EXCEPT WHEN PERSISTENCE LOOKS BETTER ...MAINLY FOR MIN TEMPS TONIGHT. BELIEVE SOUTHEAST WILL BE UNDER THE GUN LONGEST BUT DO NOT THINK AN EXPANSION OF FLASH FLOOD WATCH AREA IS NECESSARY ATTM. FLASH FLOOD WATCH ID ZONES 9-10 TIL 9PM. URBAN/SMALL STREAM WARNING THRU EVE FOR GRANITE COUNTY MT. GV ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 061/085 060/084 ... 355331 FCA BB 061/082 059/083 054 356431 POL .. 064/084 062/084 ... 356432 MSO BB 062/086 061/086 060 356322 HMM .. 065/087 060/088 ... 356322 BTM .. 058/8080 052/080 ... 357532 S80 .. 061/091 061/088 ... 352112 P69 .. 064/095 063/091 ... 353112 SMN .. 062/094 062/092 ... 353212
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 1:52 PM MDT | Severe Thunderstorm Warning | MSO | Lake, Missoula | 63 min |
| Jul 28, 3:26 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 59 min |
Nearby
Severe Thunderstorm Warnings in Montana, 1998Every severe thunderstorm warning in 1998
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.