Alert archive / Montana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 2, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 27, 1990, 6:41 PM MDT for Wheatland County, Montana. It was in force for 64 min.
The area
The counties it named.
The facts
- Issued
- Jun 27, 1990, 6:41 PM MDT (00:41 UTC)
- Expired
- Jun 27, 1990, 7:45 PM MDT
- In force
- 64 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
County Wheatland 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 (KTFX), launched 00:00Z, 0.7 hours before the alert went out and 125 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
- 3589 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 213 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 KBIL 280041
SVRBIL
MTC037-065-107-069-280145-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BILLINGS MT
641 PM MDT WED JUN 27 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 745 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE STATE OF MONTANA
NORTHERN GOLDEN VALLEY...NORTHWEST MUSSELSHELL...EASTERN
WHEATLAND...SOUTHWEST PETROLEUM...INCLUDING THE CITY OF
HARLOWTON
AT 630 PM THIS WEDNESDAY EVENING RADAR SHOWS THUNDERSTORMS
DEVELOPING RAPIDLY IN AN AREA FROM CENTRAL WHEATLAND COUNTY
NORTHEAST TO EXTREME SOUTHWEST PETROLLEUM COUNTY. HALF INCH
HAIL FELL IN HARLOWTON A LITTLE AFTER 6 PM AND RADAR SHOWS
THESE STORMS TO BE INCREASING IN INTENSITY AND MOVING NORTHEAST
AT 30 MPH.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...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 ROADWAYS QUICKLY...
AVOID DRIVING INTO AREAS WHERE WATER COVERS THE ROAD.
PEOPLE IN THIS WARNING AREA SHOULD BE ALERT FOR HEAVY RAINS...
STRONG GUSTY WINDS..HAIL AND PLENTY OF LIGHTNING. IF THREATENING
WEATHER IS SIGHTED GO TO A SAFE IMMEDIATELY. WHEN ITS SAFE
PLEASE RELAY YOUR REPORT OF SEVERE WEATHER TO THE NEAREST LAW
ENFORCEMENT AGENCY.
END/MOSHIERWhat 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 27, 2:48 PM MDT, 3 hours 53 minutes before
MTC007-043-049-272145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HELENA MT 249 PM MDT WED JUN 27 1990 RADAR REPORTS AND SURFACE OBSERVATIONS SHOW A VERY STRONG THUNDERSTORM TO THE SOUTH AND SOUTHWEST OF HELENA THIS WEDNESDAY AFTERNOON. THIS STORM IS MOVING TO THE NORTHEAST AT ABOUT 15 MPH. THIS STORM COULD VERY LIKELY PRODUCE STRONG GUSTY WINDS IN EXCESS OF 40 MPH...SMALL HAIL AND DANGEROUS LIGHTNING. ALL PERSONS IN THE PATH OF THIS STORM SHOULD SECURE ANY ARTICLES THAT COULD BLOW AWAY AND USE EXTREME CAUTION.
Special weather statement, Jun 27, 3:20 PM MDT, 3 hours 21 minutes before
MTC007-043-049-272215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HELENA MT 320 PM MDT WED JUN 27 1990 STRONG THUNDERSTORMS CONTINUE TO AFFECT THE HELENA AREA THIS WEDNESDAY AFTERNOON. ONE STORM TO THE NORTHWEST OF THE CITY HAS PRODUCED SOME SM MODERATE RAINFALL. THE LARGEST STORM IS STILL TO THE SOUTH AND SOUTHWE THE POSSIBILITY OF STRONG WINDS STILL EXIST ALONG WITH THE SMALL HAIL. ANYONE WHO IS IN THE PATH OF THESE STORMS MAY WISH/ TO SECURE ANY LIGHT ITEMS AND PROTECT FRAGILE ITEMS BUT SHOULD TAKE COVER BEFORE THE STORM ARRIVES. LIGHTNING CAN STRIKE MILES AHEAD OF OR TO THE SIDE OF THUNDERSTORMS.
Special weather statement, Jun 27, 3:22 PM MDT, 3 hours 19 minutes before
MTC007-043-049-272215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HELENA MT 320 PM MDT WED JUN 27 1990 STRONG THUNDERSTORMS CONTINUE TO AFFECT THE HELENA AREA THIS WEDNESDAY AFTERNOON. ONE STORM TO THE NORTHWEST OF THE CITY HAS PRODUCED SOME SM HAIL AND MODERATE RAINFALL. THE LARGEST STORM IS STILL TO THE SOUTH AND SOUTHWEST OF HELENA PROPER AND IS MOVING TO THE NORTHEAST AT 15 M THE POSSIBILITY OF STRONG WINDS STILL EXIST ALONG WI2TH THE SMALL HAIL. ANYONE WHO IS IN THE PATH OF THESE STORMS MAY WISH TO SECURE ANY LIGHT ITEMS AND PROTECT FRAGILE ITEMS BUT SHOULD TAKE COVER BEFORE THE STORM ARRIVES. LIGHTNING CAN STRIKE MILES AHEAD OF OR TO THE SIDE OF THUNDERSTORMS.
Special weather statement, Jun 27, 6:39 PM MDT, 2 minutes before
MTZ003-005-006-280200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 620 PM MDT WED JUN 27 1990 SCATTERED THUNDERSTORMS WERE OCCURRING ACROSS PARTS OF CENTRAL AND NORTHWEST MONTANA EAST OF THE DIVIDE. SOME OF THE STORMS WERE STRONG ...WITH BRIEF HEAVY RAIN...GUSTY WINDS...SMALL HAIL AND FREQUENT LIGHTNING. AT 615 PM MDT THE STRONGEST THUNDERSTORMS WERE IN SOUTHERN TOOLE...EASTERN PONDERA...NORTHEAST CHOUTEAU...AND SOUTHERN LIBERTY COUNTIES. OTHER STRONG STORMS WERE APPROACHING SOUTHERN FERGUS COUNTY FROM THE SOUTHWEST. THE THUNDERSTORMS WERE MOVING NORTHEAST AT AROUND 30 MILES AN HOUR. RESIDENTS OF CENTRAL...NORTHCENTRAL...AND NORTHWEST MONTANA EAST OF THE CONTINENTAL DIVIDE SHOULD REMAIN ALERT FOR THE POSSIBILITY OF STRONG THUNDERSTORMS THIS EVENING...AND CONTINUE TO LISTEN TO THIS STATION FOR LATER STATEMENTS. END
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 6:41 PM MDT | Severe Thunderstorm Warning | TFX | Golden Valley, Musselshell, Petroleum | 64 min |
Nearby
Severe Thunderstorm Warnings in Montana, 1990Every severe thunderstorm warning in 1990
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.