Alert archive / North Dakota / Mesoscale Discussions in 2012

Mesoscale Discussion 1318

June 30, 20126 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2012, 3:48 AM CDT for 6 counties in North Dakota. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Jun 30, 2012, 3:48 AM CDT (08:48 UTC)
Expired
Jun 30, 2012, 5:15 AM CDT
In force
87 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties McHenry County, ND, McLean County, ND, Mountrail County, ND, Sheridan County, ND, Ward County, ND, Wells County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 8.8 hours before the alert went out and 152 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 2012-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 82 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 2012-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.193958Sfc1 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
82 J/kg
Mixed-layer CIN
-196 J/kg
Mixed-layer LCL
2477 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
144 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 30, 3:53 PM CDTMesoscale DiscussionSPCSioux97 min
Jun 30, 4:57 PM CDTSevere Thunderstorm WatchSPCBurleigh, Emmons, Kidder, Logan, McIntosh, Sioux5 hr

Nearby

Mesoscale Discussions in North Dakota, 2012Every mesoscale discussion in 2012

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.