Alert archive / South Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 700

May 5, 20074 states

The Storm Prediction Center issued this mesoscale discussion at May 5, 2007, 10:35 AM CDT for 4 states. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
May 5, 2007, 10:35 AM CDT (15:35 UTC)
Expired
May 5, 2007, 12:00 PM CDT
In force
85 min
Issued by
the Storm Prediction Center
All 72 counties

Buena Vista County, IA, Carroll County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dickinson County, IA, Harrison County, IA, Ida County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Woodbury County, IA, Nobles County, MN, Pipestone County, MN, Rock County, MN, Antelope County, NE, Boyd County, NE, Brown County, NE, Burt County, NE, Cedar County, NE, Cherry County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Holt County, NE, Keya Paha County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Rock County, NE, Stanton County, NE, Thurston County, NE, Wayne County, NE, Wheeler County, NE, Aurora County, SD, Beadle County, SD, Bennett County, SD, Bon Homme County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hughes County, SD, Hutchinson County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, Lyman County, SD, McCook County, SD, Mellette County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Todd County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 102 km from the middle of the area, began a volume at 15:38 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 12:00Z, 3.6 hours before the alert went out and 182 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 12:00Z on 2007-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 302 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, Aberdeen, SD at 12:00Z on 2007-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 177 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
302 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
521 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
177 m²/s²
0-3 km storm-relative helicity
165 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 5, 10:55 AM CDTTornado WatchSPCCherokee, Ida, Lyon, Monona, O'Brien, Osceola and 3 more6 hr
May 5, 1:01 PM CDTMesoscale DiscussionSPCLyon, Plymouth, Sioux, Woodbury89 min
May 5, 2:42 PM CDTTornado Watch PDSSPCFremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more7 hr
May 5, 4:09 PM CDTMesoscale DiscussionSPCLyon, Plymouth, Sioux, Woodbury96 min
May 5, 4:33 PM CDTTornado Watch PDSSPCCherokee, Ida, Lyon, Monona, O'Brien, Osceola and 3 more6 hr
May 4, 7:26 PM CDTTornado WatchSPCAdams, Blaine, Boyd, Brown, Buffalo, Clay and 28 more7 hr
May 4, 8:29 PM CDTMesoscale DiscussionSPCChase, Dundy, Hayes, Hitchcock, Perkins91 min
May 4, 8:49 PM CDTMesoscale DiscussionSPCAntelope, Cedar, Dixon, Knox, Madison, Pierce and 1 more56 min
May 4, 9:22 PM CDTTornado WatchSPCAntelope, Boone, Cedar, Knox, Pierce11 hr
May 4, 9:41 PM CDTMesoscale DiscussionSPCAdams, Blaine, Brown, Buffalo, Custer, Franklin and 16 more94 min
May 4, 10:34 PM CDTMesoscale DiscussionSPCButler, Colfax, Cuming, Dodge, Gage, Jefferson and 8 more56 min
May 4, 11:28 PM CDTMesoscale DiscussionSPCChase, Dundy, Hayes, Perkins92 min
May 5, 1:23 AM CDTMesoscale DiscussionSPCAdams, Antelope, Blaine, Boone, Brown, Buffalo and 52 more67 min
May 5, 1:30 AM CDTTornado WatchSPCAdams, Antelope, Arthur, Blaine, Boone, Boyd and 60 more7 hr
May 5, 3:00 AM CDTMesoscale DiscussionSPCAdams, Antelope, Arthur, Blaine, Boone, Boyd and 60 more90 min
May 5, 6:59 AM CDTMesoscale DiscussionSPCAdams, Antelope, Boone, Buffalo, Butler, Cedar and 41 more61 min
May 5, 8:52 AM CDTMesoscale DiscussionSPCFrontier, Furnas, Harlan, Hayes, Hitchcock, Red Willow53 min
May 5, 9:51 AM CDTTornado Watch PDSSPCAdams, Blaine, Boone, Buffalo, Chase, Clay and 34 more12 hr
May 5, 11:32 AM CDTMesoscale DiscussionSPCAdams, Buffalo, Dawson, Franklin, Furnas, Gosper and 4 more88 min
May 5, 1:45 PM CDTMesoscale DiscussionSPCArthur, Box Butte, Cherry, Dawes, Deuel, Garden and 8 more2 hr
May 5, 2:32 PM CDTMesoscale DiscussionSPCButler, Cass, Colfax, Cuming, Dodge, Fillmore and 14 more28 min

Nearby

Mesoscale Discussions in South Dakota, 2007Mesoscale Discussions in Nebraska, 2007Mesoscale Discussions in Iowa, 2007Every mesoscale discussion in 2007

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.