Alert archive / North Dakota / Mesoscale Discussions in 2016

Mesoscale Discussion 1456

July 31, 20164 counties in Montana; 27 counties in North Dakota; 4 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 31, 2016, 1:27 PM MDT for 4 counties in Montana; 27 counties in North Dakota; 4 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 31, 2016, 1:27 PM MDT (19:27 UTC)
Expired
Jul 31, 2016, 3:30 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 35 counties

Fallon County, MT, Richland County, MT, Sheridan County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bottineau County, ND, Bowman County, ND, Burke County, ND, Burleigh County, ND, Divide County, ND, Dunn County, ND, Emmons County, ND, Golden Valley County, ND, Grant County, ND, Hettinger 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, Renville County, ND, Sheridan County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Ward County, ND, Williams County, ND, Corson County, SD, Harding County, SD, Perkins County, SD, Ziebach County, SD

The radar

The Bismarck radar (KBIS), 123 km from the middle of the area, began a volume at 19:28 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, 7.5 hours before the alert went out and 127 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 2016-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 263 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 2016-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 square meters per square second.1939Sfc1 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
263 J/kg
Mixed-layer CIN
-263 J/kg
Mixed-layer LCL
1097 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
95 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
Jul 31, 2:24 PM MDTSevere Thunderstorm WatchSPCCarter, Fallon, Wibaux8 hr
Jul 31, 4:42 PM MDTMesoscale DiscussionSPCCarter, Dawson, Fallon, Richland, Roosevelt, Sheridan and 1 more2 hr
Jul 30, 6:28 PM MDTMesoscale DiscussionSPCGregory, Todd, Tripp92 min
Jul 30, 6:34 PM MDTMesoscale DiscussionSPCDewey, Hughes, Hyde, Jones, Lyman, Potter and 3 more86 min
Jul 30, 6:48 PM MDTSevere Thunderstorm WatchSPCBuffalo, Hughes, Hyde, Jones, Lyman, Potter and 2 more4 hr
Jul 30, 8:32 PM MDTSevere Thunderstorm WatchSPCBennett, Custer, Fall River, Jackson, Mellette, Oglala Lakota and 3 more7 hr
Jul 30, 8:50 PM MDTMesoscale DiscussionSPCHughes, Hyde, Jones, Lyman, Stanley55 min
Jul 30, 10:03 PM MDTMesoscale DiscussionSPCBennett, Haakon, Jackson, Jones, Mellette, Oglala Lakota and 2 more117 min
Jul 30, 11:53 PM MDTMesoscale DiscussionSPCCharles Mix, Gregory, Tripp97 min
Jul 31, 12:00 PM MDTMesoscale DiscussionSPCButte, Custer, Fall River, Lawrence, Meade, Oglala Lakota and 1 more90 min
Jul 31, 2:48 PM MDTSevere Thunderstorm WatchSPCBennett, Butte, Custer, Fall River, Haakon, Harding and 7 more7 hr

Nearby

Mesoscale Discussions in North Dakota, 2016Mesoscale Discussions in Montana, 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.