Alert archive / Minnesota / Mesoscale Discussions in 2013

Mesoscale Discussion 1384

July 12, 201329 counties in Minnesota; 5 counties in North Dakota; 10 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 12, 2013, 6:28 PM CDT for 29 counties in Minnesota; 5 counties in North Dakota; 10 counties in South Dakota. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Jul 12, 2013, 6:28 PM CDT (23:28 UTC)
Expired
Jul 12, 2013, 8:00 PM CDT
In force
92 min
Issued by
the Storm Prediction Center
All 44 counties

Becker County, MN, Beltrami County, MN, Big Stone County, MN, Cass County, MN, Chippewa County, MN, Clay County, MN, Clearwater County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Koochiching County, MN, Lac qui Parle County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Pope County, MN, Red Lake County, MN, Roseau County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Yellow Medicine County, MN, Cass County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Traill County, ND, Brown County, SD, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Grant County, SD, Hamlin County, SD, Marshall County, SD, Roberts County, SD, Spink County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 147 km from the middle of the area, began a volume at 23:31 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

International Fa, MN (KINL), launched 12:00Z, 11.5 hours before the alert went out and 219 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, International Fa, MN at 12:00Z on 2013-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 58 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, International Fa, MN at 12:00Z on 2013-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 182 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
58 J/kg
Mixed-layer CIN
-429 J/kg
Mixed-layer LCL
1187 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
182 m²/s²
0-3 km storm-relative helicity
181 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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, 3:00 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Big Stone, Clay, Clearwater, Grant and 11 more60 min
Jul 12, 3:55 PM CDTSevere Thunderstorm WatchSPCBecker, Beltrami, Big Stone, Cass, Chippewa, Clay and 26 more8 hr
Jul 11, 7:34 PM CDTMesoscale DiscussionSPCAdams, Billings, Bottineau, Bowman, Burke, Dunn and 17 more116 min

Nearby

Mesoscale Discussions in Minnesota, 2013Mesoscale Discussions in South Dakota, 2013Mesoscale Discussions in North Dakota, 2013Every mesoscale discussion in 2013

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.