Alert archive / North Dakota / Mesoscale Discussions in 2006

Mesoscale Discussion 1867

August 24, 200628 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 24, 2006, 8:00 AM CDT for 28 counties in North Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Aug 24, 2006, 8:00 AM CDT (13:00 UTC)
Expired
Aug 24, 2006, 10:00 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 28 counties

Benson County, ND, Bottineau County, ND, Burke County, ND, Burleigh County, ND, Dunn County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grant County, ND, Kidder County, ND, Logan County, ND, McHenry County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Pierce County, ND, Ramsey County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Sioux County, ND, Stark County, ND, Stutsman County, ND, Ward County, ND, Wells County, ND

The radar

The Bismarck radar (KBIS), 54 km from the middle of the area, began a volume at 13:01 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, 1.0 hours before the alert went out and 55 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 2006-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2789 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 2006-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
2789 J/kg
Mixed-layer CIN
-137 J/kg
Mixed-layer LCL
568 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
208 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

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 23, 8:05 PM CDTMesoscale DiscussionSPCAdams, Billings, Burleigh, Dunn, Emmons, Grant and 8 more85 min
Aug 24, 4:14 AM CDTMesoscale DiscussionSPCBillings, Burke, Divide, Dunn, Golden Valley, McKenzie and 8 more91 min
Aug 24, 4:42 AM CDTSevere Thunderstorm WatchSPCBillings, Bottineau, Burke, Burleigh, Divide, Dunn and 20 more7 hr
Aug 24, 11:52 AM CDTSevere Thunderstorm WatchSPCAdams, Barnes, Benson, Bottineau, Burke, Burleigh and 31 more5 hr
Aug 24, 2:57 PM CDTMesoscale DiscussionSPCBarnes, Benson, Burleigh, Cass, Dickey, Eddy and 16 more2 hr
Aug 24, 3:40 PM CDTTornado WatchSPCBarnes, Benson, Cass, Dickey, Eddy, Emmons and 15 more6 hr
Aug 24, 6:03 PM CDTMesoscale DiscussionSPCBarnes, Cass, Dickey, LaMoure, Ransom, Richland and 1 more87 min

Nearby

Mesoscale Discussions in North Dakota, 2006Every mesoscale discussion in 2006

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.