Alert archive / North Dakota / Mesoscale Discussions in 2011

Mesoscale Discussion 1636

July 16, 201113 counties in Minnesota; 27 counties in North Dakota; Campbell County, McPherson County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 16, 2011, 9:25 PM CDT for 13 counties in Minnesota; 27 counties in North Dakota; Campbell County, McPherson County, South Dakota. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Jul 16, 2011, 9:25 PM CDT (02:25 UTC)
Expired
Jul 16, 2011, 11:00 PM CDT
In force
95 min
Issued by
the Storm Prediction Center
All 42 counties

Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Kittson County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Barnes County, ND, Benson County, ND, Burleigh County, ND, Cass County, ND, Cavalier County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Nelson County, ND, Pembina County, ND, Ramsey County, ND, Ransom County, ND, Sargent County, ND, Sioux County, ND, Steele County, ND, Stutsman County, ND, Towner County, ND, Traill County, ND, Walsh County, ND, Wells County, ND, Campbell County, SD, McPherson County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 54 km from the middle of the area, began a volume at 02:25 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, 2.4 hours before the alert went out and 216 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 2011-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4274 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 2011-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 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
4274 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1100 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
205 m²/s²
Significant tornado parameter
2.4
Supercell composite
13.9

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 16, 11:37 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Hubbard, Kittson and 9 more23 min
Jul 17, 9:15 AM CDTMesoscale DiscussionSPCBecker, Clay, Clearwater, Kittson, Mahnomen, Marshall and 4 more2 hr
Jul 17, 9:58 AM CDTSevere Thunderstorm WatchSPCBecker, Beltrami, Clay, Clearwater, Hubbard, Kittson and 8 more7 hr
Jul 17, 10:24 AM CDTMesoscale DiscussionSPCBecker, Clay, Clearwater, Hubbard, Mahnomen, Norman and 5 more66 min
Jul 17, 12:49 PM CDTTornado WatchSPCBecker, Clay, Clearwater, Hubbard, Mahnomen, Norman and 3 more3 hr
Jul 17, 1:42 PM CDTMesoscale DiscussionSPCAitkin, Becker, Beltrami, Benton, Cass, Clay and 18 more93 min
Jul 17, 3:37 PM CDTTornado WatchSPCBecker, Clay, Grant, Otter Tail, Wadena, Wilkin6 hr
Jul 17, 4:34 PM CDTSevere Thunderstorm WatchSPCAitkin, Benton, Carlton, Cass, Chippewa, Cook and 19 more7 hr
Jul 17, 6:34 PM CDTMesoscale DiscussionSPCBig Stone, Traverse56 min
Jul 17, 11:01 AM CDTMesoscale DiscussionSPCBenson, Eddy, Foster, Grand Forks, Nelson, Ramsey89 min

Nearby

Mesoscale Discussions in North Dakota, 2011Mesoscale Discussions in Minnesota, 2011Mesoscale Discussions in South Dakota, 2011Every mesoscale discussion in 2011

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.