Alert archive / North Dakota / Mesoscale Discussions in 2016

Mesoscale Discussion 788

May 30, 20165 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at May 30, 2016, 1:14 PM CDT for 5 counties in North Dakota. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: May 30, 2016, 1:14 PM CDT (18:14 UTC)
Expired: May 30, 2016, 2:15 PM CDT
In force: 61 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Benson County, ND, Eddy County, ND, Foster County, ND, Sheridan County, ND, Wells County, ND

The radar

The Minot AFB radar (KMBX), 101 km from the middle of the area, began a volume at 18:15 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 231May 30, 2:50 PM CDT

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 6.2 hours before the alert went out and 102 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: 197 J/kg
Mixed-layer CIN: -196 J/kg
Mixed-layer LCL: 1274 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
May 30, 2:16 PM CDT	Mesoscale Discussion	SPC	Barnes, Dickey, Emmons, Griggs, Kidder, LaMoure and 5 more	59 min
May 30, 2:48 PM CDT	Severe Thunderstorm Watch	SPC	Barnes, Burleigh, Cass, Dickey, Eddy, Emmons and 19 more	7 hr
May 30, 6:37 PM CDT	Mesoscale Discussion	SPC	Barnes, Cass, Dickey, Emmons, Griggs, Kidder and 9 more	113 min

Nearby

Mesoscale Discussions in North Dakota, 2016 Every 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.