Alert archive / North Dakota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 218, NWS Bismarck, ND

July 18, 2008Hettinger County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 18, 2008, 6:24 PM MDT for Hettinger County, North Dakota. It was in force for 66 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: Jul 18, 2008, 6:24 PM MDT (00:24 UTC)
Expired: Jul 18, 2008, 7:30 PM MDT
In force: 66 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon

County Hettinger County, ND

The radar

The Bismarck radar (KBIS), 135 km from the middle of the area, began a volume at 00:25 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
Jul 18, 1:33 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 0.4 hours before the alert went out and 265 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: 796 J/kg
Mixed-layer CIN: -134 J/kg
Mixed-layer LCL: 1821 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 18, 2:32 PM MDT, 3 hours 52 minutes earlier.

Area forecast discussion, Jul 18, 2:32 PM MDT, 3 hours 52 minutes before

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Hazardous weather outlook, Jul 18, 1:50 PM MDT, 4 hours 34 minutes before

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In the hours before

Local storm report, Jul 18, 5:52 PM MDT, 32 minutes before

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The office that day

Everything else NWS Bismarck, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 12:24 PM MDT	Severe Thunderstorm Warning	BIS	Williams	66 min
Jul 19, 12:56 PM MDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	64 min
Jul 19, 1:59 PM MDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	61 min
Jul 19, 2:56 PM MDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, Mountrail	64 min
Jul 19, 3:10 PM MDT	Tornado Warning	BIS	Dunn, McKenzie, Mountrail	35 min
Jul 19, 3:45 PM MDT	Tornado Warning	BIS	Dunn	30 min
Jul 19, 4:17 PM MDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer	43 min
Jul 19, 4:38 PM MDT	Severe Thunderstorm Warning	BIS	Emmons, McIntosh	52 min
Jul 19, 4:52 PM MDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer, Morton, Oliver, Stark	38 min
Jul 19, 5:18 PM MDT	Severe Thunderstorm Warning	BIS	Mercer, Morton, Oliver	42 min
Jul 19, 5:29 PM MDT	Severe Thunderstorm Warning	BIS	Emmons, McIntosh	31 min
Jul 19, 5:52 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton, Oliver	53 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2008 Every severe thunderstorm warning in 2008

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.