Alert archive / Minnesota / Mesoscale Discussions in 2008

Mesoscale Discussion 1764

July 11, 200824 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Jul 11, 2008, 4:02 PM CDT for 24 counties in Minnesota. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Jul 11, 2008, 4:02 PM CDT (21:02 UTC)
Expired
Jul 11, 2008, 5:30 PM CDT
In force
88 min
Issued by
the Storm Prediction Center
All 24 counties

Aitkin County, MN, Beltrami County, MN, Benton County, MN, Cass County, MN, Chippewa County, MN, Clearwater County, MN, Crow Wing County, MN, Douglas County, MN, Hubbard County, MN, Itasca County, MN, Kandiyohi County, MN, Koochiching County, MN, Lake of the Woods County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Pope County, MN, Renville County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Wadena County, MN, Yellow Medicine County, MN

The radar

The Duluth radar (KDLH), 179 km from the middle of the area, began a volume at 21:06 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

Minneapolis, MN (KMPX), launched 12:00Z, 9.0 hours before the alert went out and 213 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, Minneapolis, MN at 12:00Z on 2008-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 890 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, Minneapolis, MN at 12:00Z on 2008-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 129 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
890 J/kg
Mixed-layer CIN
-362 J/kg
Mixed-layer LCL
1222 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
129 m²/s²
0-3 km storm-relative helicity
393 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

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 10, 7:36 PM CDTTornado WatchSPCBecker, Big Stone, Clay, Grant, Mahnomen, Norman and 3 more6 hr
Jul 10, 9:59 PM CDTMesoscale DiscussionSPCBecker, Big Stone, Clay, Grant, Mahnomen, Norman and 3 more91 min
Jul 10, 11:19 PM CDTSevere Thunderstorm WatchSPCBeltrami, Clearwater, Kittson, Lake of the Woods, Marshall, Pennington and 3 more8 hr
Jul 10, 11:41 PM CDTSevere Thunderstorm WatchSPCAnoka, Benton, Blue Earth, Brown, Carver, Chippewa and 30 more5 hr
Jul 11, 2:15 AM CDTMesoscale DiscussionSPCAnoka, Benton, Blue Earth, Brown, Carver, Chippewa and 32 more60 min
Jul 11, 4:11 AM CDTMesoscale DiscussionSPCKittson, Lake of the Woods, Roseau94 min
Jul 11, 6:36 AM CDTMesoscale DiscussionSPCBeltrami, Clearwater, Kittson, Lake of the Woods, Marshall, Pennington and 3 more24 min
Jul 11, 7:42 AM CDTMesoscale DiscussionSPCKoochiching, Lake of the Woods63 min
Jul 11, 12:37 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Douglas, Grant and 15 more83 min
Jul 11, 2:26 PM CDTTornado WatchSPCAitkin, Becker, Beltrami, Benton, Big Stone, Cass and 39 more6 hr
Jul 11, 3:13 PM CDTMesoscale DiscussionSPCBrown, Cottonwood, Jackson, Lyon, Martin, Murray and 5 more92 min
Jul 11, 5:08 PM CDTSevere Thunderstorm WatchSPCBlue Earth, Brown, Cottonwood, Faribault, Jackson, Le Sueur and 9 more7 hr
Jul 11, 5:50 PM CDTMesoscale DiscussionSPCAitkin, Becker, Beltrami, Benton, Big Stone, Cass and 39 more85 min
Jul 11, 6:13 PM CDTSevere Thunderstorm WatchSPCAnoka, Carlton, Carver, Chisago, Cook, Dakota and 9 more7 hr

Nearby

Mesoscale Discussions in Minnesota, 2008Every mesoscale discussion in 2008

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.