Alert archive / North Dakota / Mesoscale Discussions in 2016

Mesoscale Discussion 1470

August 3, 201628 counties in North Dakota; 6 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 3, 2016, 2:52 PM CDT for 28 counties in North Dakota; 6 counties in South Dakota. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued
Aug 3, 2016, 2:52 PM CDT (19:52 UTC)
Expired
Aug 3, 2016, 3:45 PM CDT
In force
53 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 34 counties

Benson County, ND, Bottineau County, ND, Burleigh County, ND, Cavalier County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grant County, ND, Griggs County, ND, Kidder County, ND, Logan County, ND, McHenry County, ND, McIntosh County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Nelson County, ND, Oliver County, ND, Pierce County, ND, Ramsey County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Sioux County, ND, Stutsman County, ND, Towner County, ND, Ward County, ND, Wells County, ND, Campbell County, SD, Corson County, SD, Dewey County, SD, Meade County, SD, Perkins County, SD, Ziebach County, SD

The radar

The Bismarck radar (KBIS), 26 km from the middle of the area, began a volume at 19:55 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, 7.9 hours before the alert went out and 26 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 2016-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 58 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 2016-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.193958Sfc1 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
58 J/kg
Mixed-layer CIN
-522 J/kg
Mixed-layer LCL
1927 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 3, 3:38 PM CDTTornado WatchSPCBarnes, Benson, Bottineau, Burleigh, Cass, Cavalier and 34 more7 hr
Aug 3, 6:29 PM CDTMesoscale DiscussionSPCBarnes, Benson, Burleigh, Cass, Cavalier, Dickey and 23 more91 min
Aug 2, 8:10 PM CDTMesoscale DiscussionSPCButte, Haakon, Jones, Lawrence, Meade, Mellette and 2 more3 hr
Aug 3, 3:39 PM CDTSevere Thunderstorm WatchSPCBrown, Buffalo, Campbell, Corson, Day, Dewey and 14 more7 hr
Aug 3, 6:40 PM CDTMesoscale DiscussionSPCBennett, Gregory, Jackson, Mellette, Todd, Tripp2 hr

Nearby

Mesoscale Discussions in North Dakota, 2016Mesoscale Discussions in South Dakota, 2016Every mesoscale discussion in 2016

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.