Alert archive / South Dakota / Mesoscale Discussions in 2022

Mesoscale Discussion 955

May 29, 2022Sargent County, North Dakota; 22 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 29, 2022, 1:41 AM CDT for Sargent County, North Dakota; 22 counties in South Dakota. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
May 29, 2022, 1:41 AM CDT (06:41 UTC)
Expired
May 29, 2022, 3:15 AM CDT
In force
94 min
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 284
All 23 counties

Sargent County, ND, Aurora County, SD, Beadle County, SD, Brown County, SD, Brule County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Douglas County, SD, Grant County, SD, Gregory County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Marshall County, SD, Miner County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD

The radar

The Aberdeen radar (KABR), 71 km from the middle of the area, began a volume at 06:43 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

Aberdeen, SD (KABR), launched 00:00Z, 6.7 hours before the alert went out and 30 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, Aberdeen, SD at 00:00Z on 2022-05-29Temperature 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, Aberdeen, SD at 00:00Z on 2022-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
2671 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
126 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 29, 3:14 PM CDTMesoscale DiscussionSPCRichland91 min
May 29, 3:41 PM CDTSevere Thunderstorm WatchSPCCass, Cavalier, Grand Forks, Nelson, Pembina, Ramsey and 4 more6 hr
May 29, 5:43 PM CDTMesoscale DiscussionSPCRichland, Traill2 hr
May 28, 7:51 PM CDTMesoscale DiscussionSPCBrule, Buffalo, Gregory, Hand, Hughes, Hyde and 7 more54 min
May 28, 9:52 PM CDTSevere Thunderstorm WatchSPCAurora, Beadle, Brule, Buffalo, Charles Mix, Clark and 11 more5 hr
May 28, 11:21 PM CDTMesoscale DiscussionSPCAurora, Brule, Buffalo, Charles Mix, Davison, Douglas and 2 more84 min
May 29, 3:02 AM CDTSevere Thunderstorm WatchSPCBon Homme, Brookings, Davison, Hanson, Hutchinson, Lake and 7 more5 hr
May 29, 4:16 AM CDTMesoscale DiscussionSPCLincoln, Minnehaha, Turner89 min
May 29, 5:49 PM CDTMesoscale DiscussionSPCBon Homme, Clay, Yankton86 min
May 29, 6:59 PM CDTMesoscale DiscussionSPCBennett, Todd61 min

Nearby

Mesoscale Discussions in South Dakota, 2022Mesoscale Discussions in North Dakota, 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.