Alert archive / Montana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 28, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 9, 1998, 6:30 AM MDT for Lincoln County, Sanders County, Montana. It was in force for 60 min. 1 report 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
- Jul 9, 1998, 6:30 AM MDT (12:30 UTC)
- Expired
- Jul 9, 1998, 7:30 AM MDT
- In force
- 60 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
Counties Lincoln County, MT, Sanders County, MT
The radar
The Missoula radar (KMSX), 153 km from the middle of the area, began a volume at 12:30 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 9, 6:35 AM MDT | Hail 0.75 | Noxon, 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, 0.5 hours before the alert went out and 96 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2636 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
862 WUUS1 KMSO 091237 RRA SVRMSO MTC053-089-091330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 630 AM MDT THU JUL 9 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN LINCOLN COUNTY IN NORTHWESTERN MONTANA WESTERN SANDERS COUNTY IN WEST CENTRAL MONTANA * UNTIL 730 AM MDT * AT 630 AM MDT...SEVERE THUNDERSTORM INDICATED 5 MIILES NORTHWEST OF NOXON...BY NATIONAL WEATHER SERVICE DOPPLER RADAR...MOVING NORTHEAST AT 30 MPH. * SEVERE THUNDERSTORM WILL BE NEAR... CABINET WILDERNESS AREA BY 645 AM MDT DESTRUCTIVE HAIL...DAMAGING WINDS...DEADLY LIGHTNING...AND VERY HEAVY RAIN ARE ALL LIKELY WITH THIS STORM. FOR YOUR PROTECTION... MOVE INSIDE A STRONG BUILDING...AND STAY AWAY FROM WINDOWS. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
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 9, 2:45 AM MDT, 3 hours 45 minutes earlier.
Area forecast discussion, Jul 9, 2:45 AM MDT, 3 hours 45 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 245 AM MDT THU JUL 9 1998 WV IMAGERY SHOWING EASTERN PACIFIC TROF CONTINUING TO DEEPEN BETWEEN 140W-130W. MODELS SIMILAR IN SWINGING TROF INLAND ON FRIDAY AND THRU WESTERN MT LATE SATURDAY. MODELS DIFFER ON DEPTH OF THE TROF... HOWEVER ALL HAVE FLOW ALOFT BACKING WITH REGION REMAINING UNDER INCREASINGLY UNSTABLE SW FLOW. ISOLATED ACTIVITY AGAIN TODAY WITH CONVECTIVE POTENTIAL FAVORING WESTERN/NORTHERN PORTIONS OF CWA. SPC INDICATING SLIGHT RISK. MODELS HAVE WEAK S/WV ROTATING NORTH THRU ROCKIES ON FRIDAY. DYNAMICS AND INCREASED RH GOOD FOR MORE CLOUDS AND SCATTERED POPS. NGM HINTING AT TAPPING INTO SUBTROPICAL MOISTURE OVER DESERT SW. GIVEN DEEP SOUTHERLY FLOW THIS DISTINCTLY POSSIBLE ON FRIDAY. CONTINUED WARM...THERMAL TROF OVER REGION WITH 25 DEG C H85 TEMPS BOTH TODAY AND FRIDAY. HOWEVER LIKE MOS TREND OF A FEW DEGREES COOLER TOMORROW DUE TO CLOUD COVER/SHOWERS. SHOWERY...COOLER AND BREEZY ON SATURDAY. DF ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 088/057 085/... ... 31223 FCA BE 086/056 081/054 078 31224 POL .. 087/060 082/... ... 31224 MSO BE 088./059 085/058 080 31224 HMM .. 091/058 092/... ... 31224 BTM .. 085/051 080/... ... 31224 S80 .. 087/059 082/... ... 31234 P69 .. 093/062 088/... ... 31234 SMN .. 090/057 088/... ... 31224
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.