Alert archive / Montana / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 20, NWS Great Falls, MT

June 25, 1996Lewis and Clark County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 25, 1996, 6:12 PM MDT for Lewis and Clark County, Montana. It was in force for 33 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: Jun 25, 1996, 6:12 PM MDT (00:12 UTC)
Expired: Jun 25, 1996, 6:45 PM MDT
In force: 33 min
Issued by: NWS Great Falls, MT
Area: Whole counties

County Lewis and Clark County, MT

The radar

The Great Falls radar (KTFX), 85 km from the middle of the area, began a volume at 00:17 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.

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 0.2 hours before the alert went out and 140 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: 27 J/kg
Mixed-layer CIN: -212 J/kg
Mixed-layer LCL: 1083 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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, Jun 25, 5:29 PM MDT, 43 minutes before

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Special weather statement, Jun 25, 6:08 PM MDT, 4 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 6:47 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark, Meagher	43 min
Jun 25, 7:17 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau	43 min
Jun 25, 7:33 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Meagher	42 min
Jun 25, 8:08 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	52 min
Jun 25, 9:05 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	40 min
Jun 26, 4:00 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark, Teton	45 min
Jun 26, 4:33 PM MDT	Tornado Warning	TFX	Cascade, Lewis and Clark	42 min
Jun 26, 4:49 PM MDT	Severe Thunderstorm Warning	TFX	Teton	41 min
Jun 26, 5:53 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	52 min

Nearby

Severe Thunderstorm Warnings in Montana, 1996 Every severe thunderstorm warning in 1996

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; radar from the NEXRAD Level II archive.