Alert archive / Montana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 55, NWS Great Falls, MT

June 28, 2019Fergus County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 28, 2019, 7:42 PM MDT for Fergus County, Montana. It was in force for 48 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 28, 2019, 7:42 PM MDT (01:42 UTC)
Expired: Jun 28, 2019, 8:30 PM MDT
In force: 48 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Fergus County, MT

The radar

The Billings radar (KBLX), 164 km from the middle of the area, began a volume at 01:44 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 28, 4:45 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 1.7 hours before the alert went out and 106 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: 2556 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 252 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 28, 7:13 PM MDT, 29 minutes earlier.

Area forecast discussion, Jun 28, 7:13 PM MDT, 29 minutes before

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In the hours before

Special weather statement, Jun 28, 6:31 PM MDT, 1 hour 11 minutes before

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Special weather statement, Jun 28, 6:46 PM MDT, 56 minutes before

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Local storm report, Jun 28, 6:59 PM MDT, 43 minutes before

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Local storm report, Jun 28, 7:08 PM MDT, 34 minutes before

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Local storm report, Jun 28, 7:23 PM MDT, 19 minutes before

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Local storm report, Jun 28, 7:35 PM MDT, 7 minutes before

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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 28, 6:00 PM MDT	Special Weather Statement	TFX	Judith Basin	15 min
Jun 28, 6:11 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	22 min
Jun 28, 6:15 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin	45 min
Jun 28, 6:31 PM MDT	Special Weather Statement	TFX	Fergus	14 min
Jun 28, 6:42 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Fergus	33 min
Jun 28, 6:43 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	47 min
Jun 28, 6:46 PM MDT	Special Weather Statement	TFX	Fergus	14 min
Jun 28, 7:03 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Fergus	27 min
Jun 28, 7:16 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	44 min
Jun 28, 7:30 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Fergus	30 min
Jun 28, 7:52 PM MDT	Special Weather Statement	TFX	Judith Basin	23 min
Jun 28, 8:30 PM MDT	Special Weather Statement	TFX	Fergus	30 min

Nearby

Severe Thunderstorm Warnings in Montana, 2019 Every severe thunderstorm warning in 2019

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.