Alert archive / Montana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 6, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at May 26, 1998, 4:05 PM MDT for Granite County, Montana. It was in force for 30 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
- May 26, 1998, 4:05 PM MDT (22:05 UTC)
- Expired
- May 26, 1998, 4:35 PM MDT
- In force
- 30 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Granite County, MT
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 26, 2:45 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 10.1 hours before the alert went out and 246 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
- 6 J/kg
- Mixed-layer CIN
- -328 J/kg
- Mixed-layer LCL
- 1671 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
852 WUUS1 KMSO 262209 RRA SVRMSO MTC039-262330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 405 PM MDT TUE MAY 26 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN GRANITE COUNTY IN WEST CENTRAL MONTANA * UNTIL 435 PM MDT * AT 400 PM MDT...SEVERE THUNDERSTORM INDICATED FROM 5 MILES SOUTHWEST OF DRUMMOND TO ROCK CREEK...BY NATIONAL WEATHER SERVICE DOPPLER RADAR...MOVING NORTHWEST AT 35 MPH. * SEVERE THUNDERSTORM WILL BE NEAR... INTERSTATE 90 BETWEEN DRUMMOND AND CLINTON BY 420 PM MDT GV
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 May 26, 2:45 PM MDT, 1 hour 20 minutes earlier.
Area forecast discussion, May 26, 2:45 PM MDT, 1 hour 20 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 245 PM MDT TUE MAY 26 1998 SEVERE THUNDERSTORM WATCH ISSUED FOR WESTERN MONTANA UNTIL 8 PM TONIGHT. SATELLITE AND RADAR ARE SHOWING SOME THUNDERSTORMS POPING UP IN WESTERN MONTANA AND MOVING TO THE NORTHWEST. FROM GOES 9 SOUNDER PLOTS LIS ACROSS WESTERN MT HAVE DROPPED INTO THE +1 TO -4 RANGE...WITH CAPE VALUES AROUND 800-900 ALONG THE DIVIDE. VORT ROTATING INTO WESTERN MT FROM THE SOUTH...SHOULD SPREAD SHOWERS AND THUNDERSTORMS ACROSS OUR CWA. APPEARS THE BEST CHANCE OF STRONG THUNDERSTORMS REMAINS IN THE NORTHWEST CORNER. CWA GRADUALLY CLEARS OUT FROM THE SOUTH DURING THE DAY ON WEDNESDAY AND INTO THURSDAY...AS A WEAK RIDGE PUSHES UP FROM THE SOUTH. KOLATA ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 047/068 042/066 ... 398620 FCA RR 049/068 043/068 042 398620 POL .. 050/066 044/066 ... 398520 MSO EE 047/067 042/069 045 398310 HMM .. 045/068 040/070 ... 399310 BTM .. 039/066 035/068 ... 397310 S80 .. 043/065 043/067 ... 394311 P69 .. 042/061 044/065 ... 397311 SMN .. 041/066 043/068 ... 395111
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 4:28 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 32 min |
| May 26, 4:53 PM MDT | Severe Thunderstorm Warning | MSO | Missoula | 32 min |
| May 26, 5:18 PM MDT | Severe Thunderstorm Warning | MSO | Sanders | 47 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.