Alert archive / North Dakota / Mesoscale Discussions in 2019

Mesoscale Discussion 1913

September 2, 201920 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Sep 2, 2019, 2:47 PM CDT for 20 counties in North Dakota. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Sep 2, 2019, 2:47 PM CDT (19:47 UTC)
Expired: Sep 2, 2019, 4:15 PM CDT
In force: 88 min
Issued by: the Storm Prediction Center

Counties Benson County, ND, Burleigh County, ND, Eddy County, ND, Foster County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McHenry County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Nelson County, ND, Oliver County, ND, Pierce County, ND, Sheridan County, ND, Stutsman County, ND, Ward County, ND, Wells County, ND

The radar

The Minot AFB radar (KMBX), 77 km from the middle of the area, began a volume at 19:47 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.

Severe Thunderstorm Watch 632Sep 2, 4:05 PM CDT

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 7.8 hours before the alert went out and 365 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 847 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 194 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.

Issued	Product	Office	Counties	Lasted
Sep 2, 10:54 AM CDT	Mesoscale Discussion	SPC	Burke, Divide, Dunn, McKenzie, Mountrail, Williams	96 min
Sep 2, 1:25 PM CDT	Severe Thunderstorm Watch	SPC	Burleigh, Dickey, Foster, Kidder, LaMoure, Logan and 10 more	5 hr
Sep 2, 3:34 PM CDT	Mesoscale Discussion	SPC	Barnes, Cass, Dickey, Griggs, LaMoure, McIntosh and 6 more	86 min
Sep 2, 4:06 PM CDT	Severe Thunderstorm Watch	SPC	Barnes, Cass, Eddy, Griggs, Ransom, Richland and 3 more	5 hr
Sep 2, 6:25 PM CDT	Mesoscale Discussion	SPC	Richland, Sargent	95 min

Nearby

Mesoscale Discussions in North Dakota, 2019 Every mesoscale discussion in 2019

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.