Alert archive / North Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1905

August 27, 20076 counties in Minnesota; 17 counties in North Dakota; Campbell County, McPherson County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2007, 12:55 PM CDT for 6 counties in Minnesota; 17 counties in North Dakota; Campbell County, McPherson County, South Dakota. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued
Aug 27, 2007, 12:55 PM CDT (17:55 UTC)
Expired
Aug 27, 2007, 2:00 PM CDT
In force
65 min
Issued by
the Storm Prediction Center
All 25 counties

Becker County, MN, Clay County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, Grant County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sioux County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Campbell County, SD, McPherson County, SD

The radar

The Aberdeen radar (KABR), 132 km from the middle of the area, began a volume at 17:55 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 12:00Z, 5.9 hours before the alert went out and 158 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 12:00Z on 2007-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 13 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 12:00Z on 2007-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -19 square meters per square second.1939587897Sfc1 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
13 J/kg
Mixed-layer CIN
-915 J/kg
Mixed-layer LCL
1321 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
-19 m²/s²
0-3 km storm-relative helicity
233 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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
Aug 26, 8:04 PM CDTMesoscale DiscussionSPCKittson, Marshall, Pennington, Polk, Red Lake, Roseau116 min
Aug 26, 10:25 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Koochiching, Mahnomen and 4 more65 min
Aug 27, 1:43 AM CDTMesoscale DiscussionSPCAnoka, Chisago, Dakota, Dodge, Fillmore, Goodhue and 12 more92 min
Aug 27, 7:10 AM CDTMesoscale DiscussionSPCWilkin95 min
Aug 27, 10:14 AM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Hubbard, Itasca and 8 more91 min
Aug 27, 2:29 PM CDTSevere Thunderstorm WatchSPCAitkin, Becker, Beltrami, Cass, Clay, Clearwater and 15 more8 hr
Aug 27, 5:34 PM CDTMesoscale DiscussionSPCAitkin, Becker, Carlton, Cass, Clay, Clearwater and 8 more116 min
Aug 27, 6:19 PM CDTSevere Thunderstorm WatchSPCCarlton, Cook, Lake, Pine, Saint Louis7 hr
Aug 26, 11:07 PM CDTMesoscale DiscussionSPCAdams, Burleigh, Emmons, Grant, Hettinger, Kidder and 2 more113 min
Aug 27, 3:02 AM CDTMesoscale DiscussionSPCDickey, Emmons, LaMoure, Logan, McIntosh, Ransom and 2 more88 min
Aug 27, 3:14 AM CDTSevere Thunderstorm WatchSPCBarnes, Burleigh, Cass, Dickey, Emmons, Griggs and 10 more7 hr

Nearby

Mesoscale Discussions in North Dakota, 2007Mesoscale Discussions in Minnesota, 2007Mesoscale Discussions in South Dakota, 2007Every mesoscale discussion in 2007

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.