Alert archive / Missouri / Mesoscale Discussions in 2003
Mesoscale Discussion 652
The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2003, 10:31 PM CDT for 6 states. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Apr 30, 2003, 10:31 PM CDT (03:31 UTC)
- Expired
- May 1, 2003, 12:00 AM CDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 113 counties
Appanoose County, IA, Cedar County, IA, Clarke County, IA, Clinton County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Louisa County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Muscatine County, IA, Page County, IA, Ringgold County, IA, Scott County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Wayne County, IA, Adams County, IL, Bureau County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Hancock County, IL, Henry County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Marshall County, IL, McDonough County, IL, Mercer County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Schuyler County, IL, Stark County, IL, Whiteside County, IL, Will County, IL, Woodford County, IL, Allen County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Huntington County, IN, Jasper County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Newton County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Wabash County, IN, Whitley County, IN, Doniphan County, KS, Johnson County, KS, Leavenworth County, KS, Wyandotte County, KS, Berrien County, MI, Branch County, MI, Cass County, MI, Saint Joseph County, MI, Adair County, MO, Andrew County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Clark County, MO, Clay County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Jackson County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Ray County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Worth County, MO
The radar
The Quad Cities radar (KDVN), 87 km from the middle of the area, began a volume at 03:34 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
Davenport, (KDVN), launched 00:00Z, 3.5 hours before the alert went out and 89 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
- 1022 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 839 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 457 m²/s²
- 0-3 km storm-relative helicity
- 611 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 12.6
The text
As transmitted, in the capitals the NWS used until 2016.
720 ACUS11 KWNS 010332 SWOMCD SPC MCD 010331 IAZ000-ILZ000-MOZ000-KSZ000-INZ000-MIZ000-010500- MESOSCALE DISCUSSION 0652 NWS STORM PREDICTION CENTER NORMAN OK 1031 PM CDT WED APR 30 2003 AREAS AFFECTED...NERN MO/NRN IL/NRN IND CONCERNING...TORNADO WATCH 188...189... VALID 010331Z - 010500Z A NEW WW WILL LIKELY BE ISSUED SOON TO REPLACE WW/S 188 AND 189. REGIONAL RADAR IMAGERY SHOWS CONVECTIVE COMPLEX...INCLUDING HP SUPERCELL ALONG LEADING EDGE...OVER NRN IL IS BEGINNING TO FORM A FAIRLY SUBSTANTIAL COLD POOL AS IT MOVES EWD ALONG SURFACE WARM FRONT THAT EXTENDS FROM A LOW OVER N-CNTRL MO EWD ACROSS NRN IL /NRN IND. LATEST RUC ANALYSES SUGGEST THAT THE AIRMASS ALONG AND S OF THE WARM FRONT FROM NRN/CNTRL IL INTO NRN/CNTRL IND REMAINS MODERATELY UNSTABLE WITH MLCAPES OF 1000-1500 J/KG. STRENGTHENING LLJ FROM NERN OK INTO NRN MO/NRN IL SHOULD CONTINUE TO INTENSIFY THROUGH 01/06Z AS THE AXIS SHIFTS EWD BENEATH RIGHT ENTRANCE REGION OF UPPER-LEVEL JET STREAK CURRENTLY TRANSLATING ACROSS THE NRN GREAT LAKES/SERN CANADA. RELATIVELY WEAK MID-LEVEL STORM-RELATIVE WINDS...THE STRENGTHENING COLD POOL/LOW-LEVEL STORM-RELATIVE INFLOW ALL SUGGEST THAT DEVELOPING MCS OVER NRN IL WILL POSE A DAMAGING WIND THREAT ACROSS THE REMAINDER OF NRN IL INTO NWRN IND. LARGE HAIL WILL ALSO BE POSSIBLE GIVEN THE EMBEDDED SUPERCELL STRUCTURES. A NEW WW WILL LIKELY BE REQUIRED WITHIN THE NEXT HALF HOUR TO REPLACE WW/S 188 AND 189 ..MEAD.. 05/01/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...ILX...LSX...DVN...DMX...EAX...OAX...TOP...IWX...LOT...ILX...DVN... 39619518 39809517 40059516 40439523 40649517 40779517 40809503 41249363 41669230 41979151 42199085 42289053 42319050 42229051 41649052 40819055 40369052 40209051 40149051 40099069 39669204 39329322 38939438 38709500 38629522 38839517 39319518 41099041 41279042 41699039 41949041 41939029 41948881 42018611 42078549 42058518 42088494 42018492 41588490 41028491 40848493 40788498 40788572 40748740 40708848 40688959 40649010 40669035 40649045 40909043
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 7:31 PM CDT | Mesoscale Discussion | SPC | Adams, Bureau, Cook, DeKalb, DuPage, Grundy and 21 more | 119 min |
| Apr 30, 10:55 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Cass, DeWitt, Ford, Fulton and 22 more | 5 hr |
| May 1, 1:19 AM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, DeWitt, Ford, Fulton and 18 more | 86 min |
| May 1, 7:51 AM CDT | Mesoscale Discussion | SPC | Alexander, Crawford, Edwards, Franklin, Gallatin, Hamilton and 14 more | 114 min |
| May 1, 9:35 AM CDT | Severe Thunderstorm Watch | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 9 more | 5 hr |
| May 1, 12:15 PM CDT | Severe Thunderstorm Watch | SPC | Gallatin, Hardin | 5 hr |
| May 1, 12:09 PM CDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, Boone, Carroll, Cass and 26 more | 3 hr |
| May 1, 12:50 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Bartholomew, Blackford, Boone, Brown, Clay and 43 more | 5 hr |
| May 1, 3:10 PM CDT | Mesoscale Discussion | SPC | Adams, Bartholomew, Blackford, Boone, Brown, Clay and 35 more | 95 min |
| Apr 30, 7:30 PM CDT | Severe Thunderstorm Watch | SPC | Allen, Anderson, Atchison, Butler, Chase, Chautauqua and 23 more | 6 hr |
| Apr 30, 9:22 PM CDT | Mesoscale Discussion | SPC | Bourbon, Crawford, Linn, Miami | 83 min |
| Apr 30, 9:30 PM CDT | Severe Thunderstorm Watch | SPC | Bourbon, Cherokee, Crawford, Johnson, Leavenworth, Linn and 2 more | 6 hr |
| Apr 30, 9:52 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Butler, Chase, Chautauqua and 23 more | 83 min |
| Apr 30, 11:47 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Butler, Chase, Chautauqua, Coffey and 13 more | 118 min |
| May 1, 12:00 AM CDT | Mesoscale Discussion | SPC | Bourbon, Cherokee, Crawford, Johnson, Leavenworth, Linn and 2 more | 90 min |
| May 1, 12:10 AM CDT | Severe Thunderstorm Watch | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 22 more | 5 hr |
| May 1, 2:27 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 10 more | 2 hr |
| May 1, 12:58 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Rawlins, Sherman, Wallace | 2 hr |
| Apr 30, 8:48 PM CDT | Mesoscale Discussion | SPC | Lenawee, Monroe | 87 min |
| Apr 30, 11:28 PM CDT | Mesoscale Discussion | SPC | Barry, Calhoun, Clinton, Eaton, Genesee, Gratiot and 16 more | 92 min |
Nearby
Mesoscale Discussions in Missouri, 2003Mesoscale Discussions in Iowa, 2003Mesoscale Discussions in Illinois, 2003Every mesoscale discussion in 2003
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.