Alert archive / Minnesota / Mesoscale Discussions in 2016

Mesoscale Discussion 1818

November 18, 201625 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Nov 18, 2016, 11:22 AM CST for 25 counties in Minnesota. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Nov 18, 2016, 11:22 AM CST (17:22 UTC)
Expired
Nov 18, 2016, 4:15 PM CST
In force
5 hr
Issued by
the Storm Prediction Center
All 25 counties

Aitkin County, MN, Benton County, MN, Carlton County, MN, Cass County, MN, Chippewa County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Itasca County, MN, Kandiyohi County, MN, Koochiching County, MN, Lac qui Parle County, MN, Lake County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Otter Tail County, MN, Pope County, MN, Saint Louis County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Wadena County, MN

The radar

The Duluth radar (KDLH), 129 km from the middle of the area, began a volume at 17:23 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, 5.4 hours before the alert went out and 187 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 2016-11-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2016-11-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 337 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
570 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
337 m²/s²
0-3 km storm-relative helicity
462 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 18, 2:42 AM CSTMesoscale DiscussionSPCLac qui Parle, Lincoln4 hr
Nov 18, 6:14 AM CSTMesoscale DiscussionSPCAitkin, Becker, Big Stone, Cass, Crow Wing, Douglas and 13 more5 hr

Nearby

Mesoscale Discussions in Minnesota, 2016Every mesoscale discussion in 2016

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.