Alert archive / Montana / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 6, NWS Missoula, MT

May 31, 1993Mineral County, Sanders County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at May 31, 1993, 4:26 PM MDT for Mineral County, Sanders County, Montana. It was in force for 64 min.

The area

The counties it named.

The facts

Issued: May 31, 1993, 4:26 PM MDT (22:26 UTC)
Expired: May 31, 1993, 5:30 PM MDT
In force: 64 min
Issued by: NWS Missoula, MT
Area: Whole counties

Counties Mineral County, MT, Sanders County, MT

The nearest sounding before it

Spokane Intl Airport, WA (KGEG), launched 12:00Z, 10.4 hours before the alert went out and 184 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1796 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 206 m²/s²
0-3 km storm-relative helicity: 266 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, May 31, 11:00 AM MDT, 5 hours 26 minutes before

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Special weather statement, May 31, 4:00 PM MDT, 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA, MT
400 PM MDT MON MAY 31 1993

...THUNDERSTORMS AND RAINSHOWERS INCREASING IN COVERAGE AND INTENSITY...

THE AREA OF THUNDERSTORMS AND RAIN SHOWERS TO THE SOUTHWEST OF MISSOULA
COUNTY...LOCATED IN IDAHO COUNTY IDAHO...ARE RAPIDLY INCREASING IN BOTH
INTENSITY AND COVERAGE.  THESE STORMS ARE FORECAST TO MOVE NORTHEAST AT
25 TO 30 MPH.  THESE STORMS SHOULD MOVE INTO MONTANA WITHIN THE NEXT ONE
TO TWO HOURS.  NATIONAL WEATHER WERVICE WILL CONTINUE TO MONITOR THESE
AND ISSUE UPDATES AS REQUIRED.  THUNDERSTORMS CAN AND DO PRODUCE LIGHTNING
...HEAVY RAIN AND HAIL.  BE PREPARED TO TAKE PROTECTIVE ACTION......
END/HARDY

WWUS35KMKE,

Special weather statement, May 31, 4:04 PM MDT, 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA, MT
400 PM MDT MON MAY 31 1993

...THUNDERSTORMS AND RAINSHOWERS INCREASING IN COVERAGE AND INTENSITY...

THE AREA OF THUNDERSTORMS AND RAIN SHOWERS TO THE SOUTHWEST OF MISSOULA
COUNTY...LOCATED IN IDAHO COUNTY IDAHO...ARE RAPIDLY INCREASING IN BOTH
INTENSITY AND COVERAGE.  THESE STORMS ARE FORECAST TO MOVE NORTHEAST AT
25 TO 30 MPH.  THESE STORMS SHOULD MOVE INTO MONTANA WITHIN THE NEXT ONE
TO TWO HOURS.  NATIONAL WEATHER WERVICE WILL CONTINUE TO MONITOR THESE
AND ISSUE UPDATES AS REQUIRED.  THUNDERSTORMS CAN AND DO PRODUCE LIGHTNING
...HEAVY RAIN AND HAIL.  BE PREPARED TO TAKE PROTECTIVE ACTION......
END/HARDY

The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 31, 5:31 PM MDT	Severe Thunderstorm Warning	MSO	Sanders	59 min

Nearby

Severe Thunderstorm Warnings in Montana, 1993 Every severe thunderstorm warning in 1993

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.