Alert archive / North Dakota / Mesoscale Discussions in 2017

Mesoscale Discussion 1344

July 19, 2017Dawson County, Richland County, Wibaux County, Montana; 44 counties in North Dakota; 19 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2017, 6:01 AM MDT for Dawson County, Richland County, Wibaux County, Montana; 44 counties in North Dakota; 19 counties in South Dakota. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
Jul 19, 2017, 6:01 AM MDT (12:01 UTC)
Expired
Jul 19, 2017, 8:00 AM MDT
In force
119 min
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 66 counties

Dawson County, MT, Richland County, MT, Wibaux County, MT, Adams County, ND, Barnes County, ND, Benson County, ND, Billings County, ND, Burleigh County, ND, Cass County, ND, Dickey County, ND, Dunn County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Golden Valley County, ND, Grand Forks County, ND, Grant County, ND, Griggs County, ND, Hettinger County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McHenry County, ND, McIntosh County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Nelson County, ND, Oliver County, ND, Pierce County, ND, Ramsey County, ND, Ransom County, ND, Richland County, ND, Rolette County, ND, Sargent County, ND, Sheridan County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Steele County, ND, Stutsman County, ND, Towner County, ND, Ward County, ND, Wells County, ND, Williams County, ND, Brown County, SD, Campbell County, SD, Corson County, SD, Day County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Marshall County, SD, McPherson County, SD, Perkins County, SD, Potter County, SD, Roberts County, SD, Spink County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Bismarck radar (KBIS), 50 km from the middle of the area, began a volume at 12:04 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, 0.0 hours before the alert went out and 54 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 2017-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 205 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 2017-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 137 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
205 J/kg
Mixed-layer CIN
-404 J/kg
Mixed-layer LCL
1357 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
137 m²/s²
0-3 km storm-relative helicity
323 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 19, 1:36 AM MDTMesoscale DiscussionSPCDawson, Fallon, Garfield, McCone, Petroleum, Phillips and 5 more114 min
Jul 19, 8:59 AM MDTMesoscale DiscussionSPCCavalier, Pembina, Ramsey, Rolette, Towner, Walsh3 hr
Jul 18, 6:58 PM MDTMesoscale DiscussionSPCBennett, Butte, Custer, Fall River, Haakon, Jackson and 4 more2 hr
Jul 19, 8:55 AM MDTMesoscale DiscussionSPCBeadle, Brookings, Clark, Codington, Day, Deuel and 6 more2 hr
Jul 19, 9:24 AM MDTSevere Thunderstorm WatchSPCAurora, Beadle, Brookings, Clark, Codington, Davison and 15 more4 hr
Jul 19, 11:11 AM MDTMesoscale DiscussionSPCLake, Lincoln, McCook, Minnehaha, Moody, Turner2 hr
Jul 19, 1:52 PM MDTMesoscale DiscussionSPCCharles Mix, Douglas, Gregory, Mellette, Tripp83 min
Jul 19, 3:52 PM MDTSevere Thunderstorm WatchSPCBon Homme, Charles Mix, Clay, Douglas, Gregory, Hutchinson and 4 more6 hr

Nearby

Mesoscale Discussions in North Dakota, 2017Mesoscale Discussions in South Dakota, 2017Mesoscale Discussions in Montana, 2017Every mesoscale discussion in 2017

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.