Alert archive / Minnesota / Mesoscale Discussions in 2004
Mesoscale Discussion 2014
The Storm Prediction Center issued this mesoscale discussion at Aug 15, 2004, 7:14 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 15, 2004, 7:14 PM CDT (00:14 UTC)
- Expired
- Aug 15, 2004, 9:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 73 counties
Dickinson County, IA, Lyon County, IA, Osceola County, IA, Sioux County, IA, Anoka County, MN, Benton County, MN, Big Stone County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chippewa County, MN, Cottonwood County, MN, Douglas County, MN, Hennepin County, MN, Isanti County, MN, Jackson County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Le Sueur County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Pipestone County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Watonwan County, MN, Wright County, MN, Yellow Medicine County, MN, Boyd County, NE, Brown County, NE, Cherry County, NE, Cheyenne County, NE, Grant County, NE, Holt County, NE, Hooker County, NE, Keya Paha County, NE, Knox County, NE, Morrill County, NE, Rock County, NE, Bon Homme County, SD, Brookings County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 159 km from the middle of the area, began a volume at 00:13 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, 0.2 hours before the alert went out and 178 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
- 1009 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 1406 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 125 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
509 ACUS11 KWNS 160015 SWOMCD SPC MCD 160014 MNZ000-IAZ000-SDZ000-NEZ000-COZ000-160215- MESOSCALE DISCUSSION 2014 NWS STORM PREDICTION CENTER NORMAN OK 0714 PM CDT SUN AUG 15 2004 AREAS AFFECTED...WRN/NRN NEB...ERN SD...CNTRL/SRN MN CONCERNING...SEVERE THUNDERSTORM WATCH 754... VALID 160014Z - 160215Z ISOLATED STRONG/SEVERE STORMS MAY PERSIST FOR A SHORT PERIOD BEYOND 02Z...BUT NEW WW IS NOT CURRENTLY ANTICIPATED. CONTINUE REMAINING VALID PORTION OF WW 754 TIL 02Z EXPIRATION. SHORT WAVE TROUGH DIGGING ACROSS THE DAKOTAS IS PROGGED TO TAKE A MORE SOUTHEASTERLY TRACK TOWARD THE UPPER MISSISSIPPI VALLEY THIS EVENING. AS THIS OCCURS...AND SOUTHWESTERLY LOW-LEVEL JET STRENGTHENS FROM THE MID MISSOURI VALLEY INTO CENTRAL MINNESOTA... LARGE-SCALE FORCING FOR UPWARD VERTICAL MOTION WILL INCREASE FROM THE SIOUX FALLS SD AREA THROUGH A LARGE PART OF CENTRAL/SOUTHERN MINNESOTA. WHILE THIS MAY SUPPORT INCREASE IN THUNDERSTORM ACTIVITY...LACK OF BETTER MOISTURE INFLOW WILL LIMIT DESTABILIZATION ABOVE STABLE/STABILIZING BOUNDARY LAYER ACROSS THE UPPER MISSISSIPPI VALLEY. IN HEATED BOUNDARY LAYER NEAR SURFACE TROUGH TO THE SOUTHWEST... ...ACROSS NORTHERN/WESTERN NEBRASKA...STORMS WILL GENERALLY DIMINISH NEXT COUPLE OF HOURS WITH LOSS OF SURFACE HEATING. ONGOING STORMS NEAR ALLIANCE MAY BE SLOWEST TO WEAKEN...AS SOUTHERLY LOW-LEVEL FLOW OVER THE HIGH PLAINS IS ENHANCING SHEAR PROFILES BENEATH WEAK NORTH NORTHWESTERLY MID-LEVEL FLOW. ..KERR.. 08/16/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...DLH...MPX...DMX...FGF...FSD...OAX...ABR...LBF...UNR...BOU...CYS... 40830329 42070330 42520163 42960011 43819809 44849672 45599633 46329563 46469443 45789314 44519331 43419477 42949666 42399877 41880122 41650230 40730279
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 4:03 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Crawford, Dickinson, Harrison and 9 more | 57 min |
| Aug 16, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | Audubon, Boone, Buena Vista, Calhoun, Carroll, Cerro Gordo and 34 more | 6 hr |
| Aug 16, 6:49 PM CDT | Mesoscale Discussion | SPC | Boone, Buena Vista, Butler, Calhoun, Carroll, Dallas and 19 more | 116 min |
Nearby
Mesoscale Discussions in Minnesota, 2004Mesoscale Discussions in South Dakota, 2004Mesoscale Discussions in Nebraska, 2004Every mesoscale discussion in 2004
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.