Alert archive / Minnesota / Mesoscale Discussions in 2005

Mesoscale Discussion 907

May 18, 2005Emmet County, Iowa; 21 counties in Minnesota; Richland County, North Dakota

The Storm Prediction Center issued this mesoscale discussion at May 18, 2005, 6:50 PM CDT for Emmet County, Iowa; 21 counties in Minnesota; Richland County, North Dakota. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
May 18, 2005, 6:50 PM CDT (23:50 UTC)
Expired
May 18, 2005, 7:45 PM CDT
In force
55 min
Issued by
the Storm Prediction Center
All 23 counties

Emmet County, IA, Becker County, MN, Big Stone County, MN, Brown County, MN, Chippewa County, MN, Clay County, MN, Douglas County, MN, Grant County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Martin County, MN, Otter Tail County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Watonwan County, MN, Wilkin County, MN, Yellow Medicine County, MN, Richland County, ND

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.8 hours before the alert went out and 181 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 2005-05-18Temperature 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 2005-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 301 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
623 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
301 m²/s²
0-3 km storm-relative helicity
297 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 18, 12:58 AM CDTMesoscale DiscussionSPCHarrison, Monona, Woodbury62 min
May 18, 12:22 PM CDTMesoscale DiscussionSPCBuena Vista, Cerro Gordo, Clay, Dickinson, Emmet, Hancock and 11 more2 hr
May 18, 1:25 PM CDTSevere Thunderstorm WatchSPCDickinson, Emmet, Lyon, O'Brien, Osceola, Sioux6 hr

Nearby

Mesoscale Discussions in Minnesota, 2005Mesoscale Discussions in Iowa, 2005Mesoscale Discussions in North Dakota, 2005Every mesoscale discussion in 2005

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.