Alert archive / North Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 1397

June 20, 20056 counties in Montana; 17 counties in North Dakota; 11 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2005, 3:40 AM MDT for 6 counties in Montana; 17 counties in North Dakota; 11 counties in South Dakota. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Jun 20, 2005, 3:40 AM MDT (09:40 UTC)
Expired
Jun 20, 2005, 5:15 AM MDT
In force
95 min
Issued by
the Storm Prediction Center
All 34 counties

Carter County, MT, Custer County, MT, Fallon County, MT, Prairie County, MT, Rosebud County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Dickey County, ND, Emmons County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Morton County, ND, Ransom County, ND, Sargent County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Brown County, SD, Campbell County, SD, Corson County, SD, Dewey County, SD, Edmunds County, SD, Harding County, SD, McPherson County, SD, Perkins County, SD, Potter County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Bismarck radar (KBIS), 136 km from the middle of the area, began a volume at 09:41 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, 9.7 hours before the alert went out and 141 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 2005-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1635 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 2005-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 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
1635 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
1322 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
179 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.8

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 19, 6:55 PM MDTSevere Thunderstorm WatchSPCBig Horn, Carbon, Carter, Custer, Musselshell, Powder River and 3 more7 hr
Jun 19, 10:43 PM MDTMesoscale DiscussionSPCBig Horn, Carter, Custer, Powder River, Rosebud, Treasure and 1 more2 hr
Jun 20, 1:17 AM MDTMesoscale DiscussionSPCCarter, Custer, Dawson, Fallon, Powder River, Prairie and 3 more58 min
Jun 20, 2:00 AM MDTSevere Thunderstorm WatchSPCCarter, Custer, Fallon, Powder River, Prairie, Rosebud and 1 more5 hr
Jun 20, 3:09 PM MDTMesoscale DiscussionSPCBig Horn, Blaine, Broadwater, Cascade, Chouteau, Fergus and 16 more2 hr
Jun 20, 4:00 PM MDTSevere Thunderstorm WatchSPCBlaine, Cascade, Chouteau, Fergus, Garfield, Hill and 9 more7 hr
Jun 19, 6:02 PM MDTMesoscale DiscussionSPCBarnes, Cass, LaMoure, Ransom, Steele, Traill118 min
Jun 20, 4:20 AM MDTSevere Thunderstorm WatchSPCBarnes, Cass, Dickey, Emmons, LaMoure, Logan and 4 more5 hr
Jun 20, 5:28 AM MDTMesoscale DiscussionSPCAdams, Grant, Hettinger, Mercer, Morton, Oliver and 2 more92 min
Jun 20, 6:39 AM MDTMesoscale DiscussionSPCBarnes, Cass, Dickey, LaMoure, Ransom, Richland and 2 more96 min
Jun 20, 8:19 AM MDTMesoscale DiscussionSPCBarnes, Cass, Dickey, LaMoure, Ransom, Richland and 2 more56 min
Jun 20, 9:42 AM MDTMesoscale DiscussionSPCBarnes, Cass, Dickey, LaMoure, Ransom, Richland and 2 more63 min
Jun 20, 11:59 AM MDTMesoscale DiscussionSPCBrookings, Clark, Codington, Deuel, Grant, Hamlin and 3 more91 min
Jun 20, 12:25 PM MDTSevere Thunderstorm WatchSPCBrookings, Clark, Deuel, Hamlin, Kingsbury, Lake and 4 more7 hr
Jun 20, 1:13 PM MDTMesoscale DiscussionSPCAurora, Bennett, Brule, Buffalo, Charles Mix, Douglas and 3 more2 hr
Jun 20, 2:45 PM MDTSevere Thunderstorm WatchSPCClay, Lincoln, Union6 hr

Nearby

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