Alert archive / Indiana / Mesoscale Discussions in 2003
Mesoscale Discussion 2000
The Storm Prediction Center issued this mesoscale discussion at Jul 27, 2003, 2:29 PM CDT for 13 counties in Illinois; 39 counties in Indiana; 4 counties in Michigan. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Jul 27, 2003, 2:29 PM CDT (19:29 UTC)
- Expired
- Jul 27, 2003, 4:00 PM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 56 counties
Cook County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kankakee County, IL, Kendall County, IL, LaSalle County, IL, Livingston County, IL, McLean County, IL, Tazewell County, IL, Will County, IL, Woodford County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Madison County, IN, Marshall County, IN, Miami County, IN, Newton County, IN, Noble County, IN, Porter County, IN, Pulaski County, IN, Randolph County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN, Whitley County, IN, Berrien County, MI, Branch County, MI, Cass County, MI, Saint Joseph County, MI
The radar
The Chicago radar (KLOT), 93 km from the middle of the area, began a volume at 19:32 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
Lincoln, IL (KILX), launched 12:00Z, 7.5 hours before the alert went out and 126 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
- 868 J/kg
- Mixed-layer CIN
- -250 J/kg
- Mixed-layer LCL
- 1210 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
243 ACUS11 KWNS 271930 SWOMCD SPC MCD 271929 OHZ000-INZ000-MIZ000-ILZ000-272100- MESOSCALE DISCUSSION 2000 NWS STORM PREDICTION CENTER NORMAN OK 0229 PM CDT SUN JUL 27 2003 AREAS AFFECTED...NORTHERN IL NORTHERN IN EXTREME SOUTHWEST MI CONCERNING...SEVERE THUNDERSTORM WATCH 807... VALID 271929Z - 272100Z FORWARD PROPAGATING SEVERE MCS CONTINUES TO MOVE EASTWARD THROUGH WW 807 WITH ENHANCED GROWTH SOUTHEASTWARD INTO THE INSTABILITY AXIS DURING THE PAST HOUR. 100MB MLCAPE GREATER THAN 2000 J/KG REMAINS IN PLACE IN THE SOUTHERN HALF OF THE WATCH. IT IS UNCLEAR HOW REPRESENTATIVE THE 18Z ILX SOUNDING WAS FOR PRE MCS CONDITIONS..MLCAPE OF APPROXIMATELY 1000 J/KG WAS OBSERVED WITH A 700-500 LAPSE RATE OF 6C/KM. WV IMAGERY DOES SUGGEST THAT A NARROW EAST WEST PLUME OF STEEPER LASE RATES MAY BE LOCATED SLIGHTLY NORTH OF ILX NEAR THE PATH OF THE MCS. MID LEVEL WESTERLY WINDS OF 40-50 KT APPARENT AS THE MCS PASSED DSM DVN AND LOT ARE SUGGESTIVE OF A REAR INFLOW JET THAT WILL HELP CONTINUE THE SEVERE WIND THREAT. ..SCHNEIDER.. 07/27/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...ILN...IWX...IND...LOT...ILX... 40588966 40848927 41708865 41908822 42048601 41948487 41028470 40088473 39998569 40258728 40338891 40508960
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 10:44 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, DuPage, Grundy and 19 more | 91 min |
| Jul 27, 11:30 AM CDT | Severe Thunderstorm Watch | SPC | Bureau, DuPage, Ford, Grundy, Iroquois, Kankakee and 10 more | 6 hr |
| Jul 26, 7:46 PM CDT | Mesoscale Discussion | SPC | Baraga, Delta, Dickinson, Gogebic, Houghton, Iron and 3 more | 89 min |
| Jul 26, 9:07 PM CDT | Mesoscale Discussion | SPC | Alger, Baraga, Delta, Dickinson, Iron, Marquette | 53 min |
Nearby
Mesoscale Discussions in Indiana, 2003Mesoscale Discussions in Illinois, 2003Mesoscale Discussions in Michigan, 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.