Alert archive / Minnesota / Mesoscale Discussions in 2007

Mesoscale Discussion 798

May 14, 20077 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at May 14, 2007, 7:48 PM CDT for 7 counties in Minnesota. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
May 14, 2007, 7:48 PM CDT (00:48 UTC)
Expired
May 14, 2007, 9:45 PM CDT
In force
117 min
Issued by
the Storm Prediction Center

Counties Aitkin County, MN, Cass County, MN, Crow Wing County, MN, Hubbard County, MN, Itasca County, MN, Saint Louis County, MN, Wadena County, MN

The radar

The Duluth radar (KDLH), 112 km from the middle of the area, began a volume at 00:50 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 00:00Z, 0.8 hours before the alert went out and 263 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 00:00Z on 2007-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 340 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 00:00Z on 2007-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
340 J/kg
Mixed-layer CIN
-189 J/kg
Mixed-layer LCL
1656 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
15 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.

IssuedProductOfficeCountiesLasted
May 14, 8:06 PM CDTMesoscale DiscussionSPCAitkin, Cass, Crow Wing, Hubbard, Itasca, Saint Louis and 1 more114 min

Nearby

Mesoscale Discussions in Minnesota, 2007Every 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.