Alert archive / South Dakota / Mesoscale Discussions in 2007
Mesoscale Discussion 862
The Storm Prediction Center issued this mesoscale discussion at May 22, 2007, 7:50 PM CDT for 8 counties in Minnesota; 8 counties in Nebraska; 26 counties in South Dakota. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- May 22, 2007, 7:50 PM CDT (00:50 UTC)
- Expired
- May 22, 2007, 9:15 PM CDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 42 counties
Big Stone County, MN, Chippewa County, MN, Lac qui Parle County, MN, Lincoln County, MN, Pipestone County, MN, Swift County, MN, Traverse County, MN, Yellow Medicine County, MN, Antelope County, NE, Boyd County, NE, Cedar County, NE, Garfield County, NE, Holt County, NE, Knox County, NE, Rock County, NE, Wheeler County, NE, Aurora County, SD, Bon Homme County, SD, Brookings County, SD, Charles Mix County, SD, Clark County, SD, Clay County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Douglas County, SD, Grant County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Roberts County, SD, Sanborn County, SD, Turner County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 52 km from the middle of the area, began a volume at 00:51 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
Aberdeen, SD (KABR), launched 00:00Z, 0.8 hours before the alert went out and 147 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.
- Mixed-layer CAPE
- 916 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 673 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -32 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- -0.2
- Supercell composite
- -1.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 230050 SWOMCD SPC MCD 230050 MNZ000-IAZ000-SDZ000-NDZ000-NEZ000-230215- MESOSCALE DISCUSSION 0862 NWS STORM PREDICTION CENTER NORMAN OK 0750 PM CDT TUE MAY 22 2007 AREAS AFFECTED...ERN SD...NERN NEB AND WRN MN CONCERNING...SEVERE THUNDERSTORM WATCH 288... VALID 230050Z - 230215Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 288 CONTINUES. OVERALL SEVERE THREAT APPEARS MARGINAL IN REMAINING PORTIONS OF WW 287. STRONGEST STORMS ARE DEVELOPING OVER N CNTRL NEB AND THIS ACTIVITY MAY BE CAPABLE OF PRODUCING ISOLATED LARGE HAIL AND STRONG WIND GUSTS. OTHER STORMS ARE DEVELOPING FARTHER NE FROM NERN SD INTO W CNTRL MN...BUT THIS ACTIVITY DOES NOT APPEAR TO BE PARTICULARLY ORGANIZED ATTM. STORMS CONTINUE DEVELOPING ALONG AND E OF COLD FRONT FROM ERN SD INTO WRN MN AND SWWD INTO N CNTRL NEB. THE ATMOSPHERE REMAINS MODERATELY UNSTABLE FROM NERN NEB INTO SERN SD WITH MLCAPE AROUND 1500 J/KG. INSTABILITY IS INCREASINGLY MARGINAL WITH NEWD EXTENT INTO SD AND WRN MN. THE ENVIRONMENT DOES NOT APPEAR PARTICULARLY FAVORABLE FOR SEVERE WEATHER WHERE STORMS ARE CURRENTLY DEVELOPING OVER SD WITH MODEST DEEP SHEAR AND INSTABILITY FROM NERN SD INTO WRN MN. FARTHER SE FROM NERN NEB...SERN SD AND SWRN MN...THE LOW LEVEL JET WILL STRENGTHEN AND STORMS OVER N CNTRL NEB MAY SPREAD INTO THIS REGION LATER THIS EVENING. HOWEVER...LOW CLOUDS HAVE LIMITED BOUNDARY LAYER DESTABILIZATION...AND THIS ALONG WITH NOCTURNAL COOLING MAY SERVE AS A POTENTIAL LIMITING FACTORS. ..DIAL.. 05/23/2007 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MPX...FGF...FSD...OAX...ABR...GID...LBF... 45109542 42749700 41729889 42289967 46239710
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 12:30 PM CDT | Mesoscale Discussion | SPC | Blue Earth, Carver, Dakota, Dodge, Faribault, Fillmore and 19 more | 3 hr |
| May 23, 2:58 PM CDT | Severe Thunderstorm Watch | SPC | Chisago, Dakota, Dodge, Fillmore, Freeborn, Goodhue and 9 more | 6 hr |
| May 23, 5:24 PM CDT | Mesoscale Discussion | SPC | Dodge, Fillmore, Freeborn, Goodhue, Mower, Olmsted and 3 more | 2 hr |
| May 22, 9:41 PM CDT | Mesoscale Discussion | SPC | Adams, Buffalo, Clay, Fillmore, Franklin, Greeley and 10 more | 94 min |
| May 22, 10:49 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Butler, Clay, Colfax, Fillmore, Franklin and 13 more | 5 hr |
| May 23, 2:27 AM CDT | Mesoscale Discussion | SPC | Butler, Colfax, Dodge, Fillmore, Jefferson, Platte and 6 more | 93 min |
| May 23, 12:22 PM CDT | Mesoscale Discussion | SPC | Gage, Jefferson, Johnson, Lancaster, Nemaha, Otoe and 3 more | 83 min |
| May 23, 1:27 PM CDT | Severe Thunderstorm Watch | SPC | Johnson, Nemaha, Otoe, Pawnee, Richardson | 7 hr |
| May 23, 3:11 PM CDT | Mesoscale Discussion | SPC | Nemaha, Pawnee, Richardson | 94 min |
| May 23, 5:19 PM CDT | Mesoscale Discussion | SPC | Cass, Douglas, Fillmore, Gage, Jefferson, Johnson and 11 more | 86 min |
Nearby
Mesoscale Discussions in South Dakota, 2007Mesoscale Discussions in Minnesota, 2007Mesoscale Discussions in Nebraska, 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.