Alert archive / North Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 1491

June 26, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Jun 26, 2005, 6:12 PM MDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 26, 2005, 6:12 PM MDT (00:12 UTC)
Expired
Jun 26, 2005, 8:15 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
All 42 counties

Carter County, MT, Dawson County, MT, Fallon County, MT, Powder River County, MT, Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Wibaux County, MT, Adams County, ND, Benson County, ND, Billings County, ND, Bottineau County, ND, Bowman County, ND, Burke County, ND, Cavalier County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, Hettinger County, ND, McHenry County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Mountrail County, ND, Pembina County, ND, Pierce County, ND, Ramsey County, ND, Renville County, ND, Rolette County, ND, Slope County, ND, Stark County, ND, Towner County, ND, Walsh County, ND, Ward County, ND, Williams County, ND, Butte County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Perkins County, SD, Campbell County, WY, Crook County, WY

The radar

The Bismarck radar (KBIS), 74 km from the middle of the area, began a volume at 00:11 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.2 hours before the alert went out and 78 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 2005-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2883 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 2005-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2883 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
888 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
1.0
Supercell composite
5.1

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.

IssuedProductOfficeCountiesLasted
Jun 27, 3:10 PM MDTMesoscale DiscussionSPCBig Horn, Broadwater, Carbon, Cascade, Chouteau, Fergus and 21 more2 hr
Jun 27, 4:20 PM MDTSevere Thunderstorm WatchSPCBig Horn, Cascade, Fergus, Golden Valley, Judith Basin, Meagher and 10 more8 hr
Jun 26, 6:08 PM MDTMesoscale DiscussionSPCBarnes, Burleigh, Cass, Dickey, Eddy, Emmons and 19 more2 hr
Jun 26, 7:15 PM MDTSevere Thunderstorm WatchSPCBarnes, Benson, Burleigh, Cass, Cavalier, Dickey and 28 more8 hr
Jun 26, 8:58 PM MDTMesoscale DiscussionSPCBarnes, Benson, Burleigh, Cass, Cavalier, Dickey and 28 more92 min
Jun 26, 10:45 PM MDTSevere Thunderstorm WatchSPCRichland6 hr
Jun 27, 2:08 PM MDTMesoscale DiscussionSPCCuster, Fall River, Lawrence, Oglala Lakota2 hr
Jun 27, 2:30 PM MDTSevere Thunderstorm WatchSPCBennett, Butte, Custer, Fall River, Jackson, Lawrence and 3 more7 hr

Nearby

Mesoscale Discussions in North Dakota, 2005Mesoscale Discussions in Montana, 2005Mesoscale Discussions in South Dakota, 2005Every 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.