Alert archive / Minnesota / Mesoscale Discussions in 2007

Mesoscale Discussion 1285

June 26, 200720 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Jun 26, 2007, 1:27 PM CDT for 20 counties in Minnesota. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Jun 26, 2007, 1:27 PM CDT (18:27 UTC)
Expired: Jun 26, 2007, 3:00 PM CDT
In force: 93 min
Issued by: the Storm Prediction Center

Counties Aitkin County, MN, Benton County, MN, Brown County, MN, Carlton County, MN, Carver County, MN, Crow Wing County, MN, Isanti County, MN, Kanabec County, MN, Lake County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Nicollet County, MN, Pine County, MN, Renville County, MN, Saint Louis County, MN, Sherburne County, MN, Sibley County, MN, Wright County, MN

The radar

The Duluth radar (KDLH), 104 km from the middle of the area, began a volume at 18:28 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 451Jun 26, 2:00 PM CDT

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 6.5 hours before the alert went out and 158 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1788 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 974 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 91 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.

Issued	Product	Office	Counties	Lasted
Jun 26, 2:01 PM CDT	Severe Thunderstorm Watch	SPC	Carlton, Chisago, Cook, Dakota, Goodhue, Lake and 4 more	7 hr
Jun 26, 5:04 PM CDT	Mesoscale Discussion	SPC	Cook, Lake	86 min

Nearby

Mesoscale Discussions in Minnesota, 2007 Every mesoscale discussion in 2007

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.