Alert archive / North Dakota / Mesoscale Discussions in 2016

Mesoscale Discussion 1340

July 20, 201613 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 20, 2016, 8:14 PM CDT for 13 counties in North Dakota. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued
Jul 20, 2016, 8:14 PM CDT (01:14 UTC)
Expired
Jul 20, 2016, 9:15 PM CDT
In force
61 min
Issued by
the Storm Prediction Center

Counties Benson County, ND, Burleigh County, ND, Cavalier County, ND, Eddy County, ND, Grant County, ND, Kidder County, ND, Morton County, ND, Oliver County, ND, Pierce County, ND, Ramsey County, ND, Sheridan County, ND, Towner County, ND, Wells County, ND

The radar

The Minot AFB radar (KMBX), 116 km from the middle of the area, began a volume at 01:16 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 nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.2 hours before the alert went out and 169 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 00:00Z on 2016-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4358 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 00:00Z on 2016-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.19395878Sfc1 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
4358 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
1684 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.2
Supercell composite
3.4

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 20, 8:41 PM CDTSevere Thunderstorm WatchSPCBarnes, Cass, Grand Forks, Griggs, Nelson, Pembina and 3 more6 hr
Jul 20, 11:16 PM CDTMesoscale DiscussionSPCBarnes, Cass, Grand Forks, Griggs, Nelson, Pembina and 3 more59 min

Nearby

Mesoscale Discussions in North 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.