Alert archive / North Dakota / Mesoscale Discussions in 2012

Mesoscale Discussion 1456

July 12, 201212 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 12, 2012, 5:15 PM CDT for 12 counties in North Dakota. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued
Jul 12, 2012, 5:15 PM CDT (22:15 UTC)
Expired
Jul 12, 2012, 6:15 PM CDT
In force
60 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Barnes County, ND, Cass County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Kidder County, ND, Ransom County, ND, Sheridan County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Wells County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 98 km from the middle of the area, began a volume at 22:19 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 12:00Z, 10.3 hours before the alert went out and 185 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 2012-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 277 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 2012-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -56 square meters per square second.1939Sfc1 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
277 J/kg
Mixed-layer CIN
-275 J/kg
Mixed-layer LCL
1276 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-56 m²/s²
0-3 km storm-relative helicity
-33 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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
Jul 12, 2:17 PM CDTMesoscale DiscussionSPCBarnes, Cass, Dickey, Eddy, Foster, Grand Forks and 12 more88 min

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; radar from the NEXRAD Level II archive.