Alert archive / Minnesota / Mesoscale Discussions in 2011

Mesoscale Discussion 1899

August 8, 201118 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Aug 8, 2011, 12:19 PM CDT for 18 counties in Minnesota. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
Aug 8, 2011, 12:19 PM CDT (17:19 UTC)
Expired
Aug 8, 2011, 1:15 PM CDT
In force
56 min
Issued by
the Storm Prediction Center

Counties Aitkin County, MN, Benton County, MN, Carlton County, MN, Cass County, MN, Cook County, MN, Crow Wing County, MN, Douglas County, MN, Itasca County, MN, Kandiyohi County, MN, Lake County, MN, Mille Lacs County, MN, Morrison County, MN, Pope County, MN, Saint Louis County, MN, Stearns County, MN, Swift County, MN, Todd County, MN, Wadena County, MN

The radar

The Duluth radar (KDLH), 59 km from the middle of the area, began a volume at 17:20 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, 5.3 hours before the alert went out and 165 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 2011-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 548 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 2011-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 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
548 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
656 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
68 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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Nearby

Mesoscale Discussions in Minnesota, 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.