Alert archive / Montana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 41, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 30, 1998, 2:09 PM MDT for Mineral County, Montana. It was in force for 46 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 30, 1998, 2:09 PM MDT (20:09 UTC)
- Expired
- Jul 30, 1998, 2:55 PM MDT
- In force
- 46 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Mineral County, MT
The radar
The Missoula radar (KMSX), 78 km from the middle of the area, began a volume at 20:13 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
Spokane, WA (KOTX), launched 12:00Z, 8.2 hours before the alert went out and 122 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
- 8 J/kg
- Mixed-layer CIN
- -342 J/kg
- Mixed-layer LCL
- 1869 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
167 WUUS1 KMSO 302012 RRA SVRMSO MTC061-302055- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 209 PM MDT THU JUL 30 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN MINERAL COUNTY IN WEST CENTRAL MONTANA * UNTIL 255 PM MDT * AT 205 PM MDT...SEVERE THUNDERSTORM INDICATED 5 MILES SOUTHEAST OF LOOKOUT PASS...BY NATIONAL WEATHER SERVICE DOPPLER RADAR... MOVING NORTHWEST AT 10 MPH. * SEVERE THUNDERSTORM WILL BE NEAR... INTERSTATE 90 NEAR LOOKOUT PASS AT 230 PM MDT SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH... DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. 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. WHITMORE
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 30, 9:00 AM MDT, 5 hours 9 minutes earlier.
Area forecast discussion, Jul 30, 9:00 AM MDT, 5 hours 9 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 900 AM MDT THU JUL 30 1998 NO CHANGES TO MT ZONES. 03Z ETA RUN NICELY SHOWS EXTENSION OF VORT LOBE ROTATING NORTHWARD FROM UPPER LOW ALONG NORTHERN CALIF COAST. SHORTWAVE NOTED IN S-CENTRAL IDA AND LAYERED MOISTURE BAND CENTRAL IDA...SYSTEM MOVES ACROSS FORECAST AREA THIS AFTERNOON IN GOOD TIMING OF AFTERNOON HEATING. NEARBY RAOBS SHOW LARGE CAPES TODAY AFTER WARMING OF LOWEST 100 MB. WEAK SHEAR AVAILABLE FOR SEVERE STORMS BUT STRONG LIFT ASSOCIATED WITH SHORTWAVE AND SLOW CELL MOVEMENT SHOULD RESULT IN GOOD PRECIP MAKERS AND POTENTIAL HAIL. STRONGER DYNAMICS TODAY NEAR UPPER LOW ACROSS EASTERN ORE...BUT LEFTOVER CONVECTION MAY HOLD TOGETHER LATE TONIGHT AS IT MOVES OVER CWA. UPPER TROUGH MOVES INLAND FRIDAY AND WILL KEEP ACTIVE SHOWER/T-STORM PATTERN W OF DIVIDE WITH BETTER CHANCE OF SEVERE E OF DIVIDE. MORNING CLOUDS AND SHOWERS ACROSS IDA ZONES MAY HAMPER MAX TEMPS SLIGHTLY...WILL SEND CHANGES. BOLDT ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 087/060 086/... ... 28653 FCA TW 085/059 084/057 080 28553 POL .. 084/062 083/... ... 28553 MSO TW 086/059 084/057 082 28554 HMM .. 088/060 086/... ... 28554 BTM .. 081/054 080/... ... 28555 S80 .. 086/058 089/... ... 28653 P69 .. 093/062 093/... ... 28653 SMN .. 090/053 088/... ... 28553
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; radar from the NEXRAD Level II archive.