Alert archive / Montana / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 4, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jun 15, 1987, 4:34 PM MDT for Jefferson County, Lewis and Clark County, Powell County, Montana. It was in force for 116 min.
The area
The counties it named.
The facts
- Issued
- Jun 15, 1987, 4:34 PM MDT (22:34 UTC)
- Expired
- Jun 15, 1987, 6:30 PM MDT
- In force
- 116 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
Counties Jefferson County, MT, Lewis and Clark County, MT, Powell County, MT
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Great Falls, MT (KGTF), launched 12:00Z, 10.6 hours before the alert went out and 123 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
- 3179 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 46 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 KHLN 152234
SVRHLN
MTC043-049-077-160030-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HELENA MONTANA
434 PM MDT MON JUN 15 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 630 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN SOUTHWEST MONTANA
...JEFFERSON...LEWIS AND CLARK...POWELL
THUNDERSTORMS MOVING INTO THIS AREA PRODUCED WINDS TO 59 MPH AS THEY
MOVED THROUGH THE DILLON AREA ALONG WITH SMALL HAIL. WINDS GUSTED TO
63 MPH IN BUTTE AT 4:15 PM AS THE THUNDERSTORMS MOVED THROUGH. THESE
STORMS ARE MOVING TOWARDS THE NORTHEAST AT 35 MPH. PEOPLE IN THESE
COUNTIES SHOULD BE PREPARED TO TAKE APPRO]PRIATE ACTION.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.
In the hours before
Special weather statement, Jun 15, 3:34 PM MDT, 1 hour before
<<<<<<<<^GTFSPSMSO SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 3.30PM MONDAY JUNE 15, 1987 THE NATIONAL SEVERE STORMS FORECAST CENTER IN KANSAS CITY HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR ALL OR PORTIONS OF MISSOULA, MINERAL, RAVALLI, AND GRANITE COUNTIES IN MONTANA AS WELL AS NEIGHBORING COUNTIES IN IDAHO. THIS WATCH IS IN EFFECT UNTIL 10PM MDT THIS EVENING. AT 3.30 THIS AFTERNOON MISSOULA WEATHER RADAR IS SHOWING SOME VERY STRONG THUNDERSTORMS ABOUT 60 MILES SOUTH-SOUTH WEST OF MISSOULA AND THESE STORMS ARE MOVING NORTH-NORTH EAST AT ABOUT 30MPH. THESE STORMS, AS WELL AS OTHERS THAT MAY FORM OVER THE AREA IN THE NEXT FEW HOURS COULD PRODUCE STRONG WINDS AND HAI L. WE WILL CONTINUE TO WATCH THIS SYSTEM, AND ISSUE FURTHER STATEMENTS AS CONDITIONS WARRANT... GOENS/2135
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 15, 3:44 PM MDT | Severe Thunderstorm Warning | MSO | Jefferson, Madison, Silver Bow | 61 min |
| Jun 15, 4:19 PM MDT | Severe Thunderstorm Warning | MSO | Missoula, Ravalli | 116 min |
| Jun 15, 4:19 PM MDT | Severe Thunderstorm Warning | MSO | Mineral | 116 min |
Nearby
Severe Thunderstorm Warnings in Montana, 1987Every severe thunderstorm warning in 1987
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.