Alert archive / Minnesota / Mesoscale Discussions in 2022

Mesoscale Discussion 813

May 18, 20229 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at May 18, 2022, 2:01 PM CDT for 9 counties in Minnesota. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
May 18, 2022, 2:01 PM CDT (19:01 UTC)
Expired
May 18, 2022, 3:30 PM CDT
In force
89 min
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch possible
Chance of a watch
60%

Counties Cass County, MN, Crow Wing County, MN, Douglas County, MN, Hubbard County, MN, Itasca County, MN, Morrison County, MN, Otter Tail County, MN, Todd County, MN, Wadena County, MN

The radar

The Duluth radar (KDLH), 206 km from the middle of the area, began a volume at 19:05 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.0 hours before the alert went out and 209 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 2022-05-18Temperature 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 2022-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.19395878Sfc1 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
843 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
97 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
May 18, 2:21 PM CDTSevere Thunderstorm WatchSPCAitkin, Benton, Carlton, Cass, Chisago, Crow Wing and 9 more6 hr
May 18, 4:37 PM CDTMesoscale DiscussionSPCAnoka, Benton, Chisago, Isanti, Kanabec, Lake and 3 more53 min

Nearby

Mesoscale Discussions in Minnesota, 2022Every mesoscale discussion in 2022

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.