Alert archive / North Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 898

May 17, 20057 counties in Montana; 9 counties in North Dakota; Harding County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 17, 2005, 5:20 PM MDT for 7 counties in Montana; 9 counties in North Dakota; Harding County, South Dakota. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: May 17, 2005, 5:20 PM MDT (23:20 UTC)
Expired: May 17, 2005, 6:45 PM MDT
In force: 85 min
Issued by: the Storm Prediction Center

Counties Daniels County, MT, Dawson County, MT, Fallon County, MT, Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Golden Valley County, ND, Hettinger County, ND, McKenzie County, ND, Slope County, ND, Stark County, ND, Williams County, ND, Harding County, SD

The radar

The Bismarck radar (KBIS), 239 km from the middle of the area, began a volume at 23:23 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.3 hours before the alert went out and 243 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: 812 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 17, 11:53 AM MDT	Mesoscale Discussion	SPC	Carter, Custer, Daniels, Dawson, Fallon, Garfield and 8 more	2 hr
May 17, 1:30 PM MDT	Severe Thunderstorm Watch	SPC	Carter, Custer, Daniels, Dawson, Fallon, Garfield and 8 more	8 hr
May 17, 12:29 PM MDT	Mesoscale Discussion	SPC	Bennett, Todd, Tripp	2 hr
May 17, 12:50 PM MDT	Severe Thunderstorm Watch	SPC	Bennett, Butte, Corson, Dewey, Haakon, Harding and 11 more	8 hr
May 17, 4:29 PM MDT	Mesoscale Discussion	SPC	Brule, Buffalo, Dewey, Gregory, Haakon, Hughes and 10 more	31 min
May 17, 4:45 PM MDT	Severe Thunderstorm Watch	SPC	Brule, Buffalo, Campbell, Charles Mix, Corson, Dewey and 14 more	6 hr

Nearby

Mesoscale Discussions in North Dakota, 2005 Mesoscale Discussions in Montana, 2005 Mesoscale Discussions in South Dakota, 2005 Every mesoscale discussion in 2005

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.