Alert archive / Indiana / Mesoscale Discussions in 2004
Mesoscale Discussion 944
The Storm Prediction Center issued this mesoscale discussion at May 27, 2004, 3:12 PM CDT for 19 counties in Illinois; 35 counties in Indiana. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 27, 2004, 3:12 PM CDT (20:12 UTC)
- Expired
- May 27, 2004, 5:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 54 counties
Champaign County, IL, Christian County, IL, Clark County, IL, Coles County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Ford County, IL, Logan County, IL, Macon County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Moultrie County, IL, Piatt County, IL, Sangamon County, IL, Shelby County, IL, Vermilion County, IL, Bartholomew County, IN, Benton County, IN, Boone County, IN, Brown County, IN, Clay County, IN, Clinton County, IN, Decatur County, IN, Fayette County, IN, Fountain County, IN, Franklin County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Jackson County, IN, Johnson County, IN, Madison County, IN, Marion County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN, Wayne County, IN
The radar
The Indianapolis radar (KIND), 130 km from the middle of the area, began a volume at 20:13 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 8.2 hours before the alert went out and 75 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
- 577 J/kg
- Mixed-layer CIN
- -123 J/kg
- Mixed-layer LCL
- 465 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
681 ACUS11 KWNS 272013 SWOMCD SPC MCD 272012 OHZ000-INZ000-ILZ000-272215- MESOSCALE DISCUSSION 0944 NWS STORM PREDICTION CENTER NORMAN OK 0312 PM CDT THU MAY 27 2004 AREAS AFFECTED...CNTRL IL...CNTRL IN...W CNTRL OH CONCERNING...SEVERE THUNDERSTORM WATCH 309... VALID 272012Z - 272215Z CONTINUE WW. 100 MB MEAN MIXED LAYER CAPE IS NOW IN EXCESS OF 2000 J/KG...AND UP TO 3000 J/KG...ALONG LOW-LEVEL CONFLUENT AXIS ACROSS CENTRAL ILLINOIS AND CENTRAL INDIANA. THIS AREA IS BENEATH ZONE BETWEEN NORTHERN AND SOUTHERN BRANCHES OF STRONGER WESTERLIES...WHICH WILL BECOME INCREASINGLY DIFFLUENT NEXT FEW HOURS AS UPSTREAM NORTHERN BRANCH TROUGH CONTINUES EASTWARD INTO THE GREAT LAKES REGION. MID-LEVEL MOISTENING/ASCENT ALREADY IS EVIDENT IN WATER VAPOR IMAGERY ACROSS CENTRAL ILLINOIS...WHERE NEW CONVECTIVE DEVELOPMENT APPEARS LIKELY SHORTLY. OTHERWISE...DOWNSTREAM ACTIVITY ROUGHLY ALONG THE INTERSTATE 70 CORRIDOR ACROSS CENTRAL INDIANA AND WEST CENTRAL OHIO SHOULD CONTINUE TO INCREASE IN INTENSITY. LARGE HAIL WILL REMAIN LIKELY IN STRONGER CELLS...AND DAMAGING WIND THREAT MAY INCREASE TOWARD 28/00Z...AS CONVECTIVE CLUSTERS GROW/BECOME INCREASINGLY ORGANIZED IN STRONGLY SHEARED ENVIRONMENT. ..KERR.. 05/27/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...ILN...IWX...IND...LOT...ILX...LSX... 40339030 40548873 40758716 40258545 39508457 38848621 39098757 39438976
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 7:57 PM CDT | Mesoscale Discussion | SPC | Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 13 more | 63 min |
| May 26, 8:55 PM CDT | Tornado Watch | SPC | Edwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 16 more | 5 hr |
| May 26, 9:36 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Christian and 25 more | 54 min |
| May 26, 11:14 PM CDT | Mesoscale Discussion | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 17 more | 2 hr |
| May 27, 1:53 AM CDT | Mesoscale Discussion | SPC | Christian, Clark, Clay, Coles, Crawford, Cumberland and 9 more | 3 hr |
| May 27, 11:10 AM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Cass, Christian, DeWitt and 25 more | 2 hr |
| May 27, 11:55 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Hancock, Henderson, McDonough, Pike and 3 more | 6 hr |
| May 27, 1:07 PM CDT | Mesoscale Discussion | SPC | Champaign, Clark, Coles, DeWitt, Douglas, Edgar and 12 more | 113 min |
| May 27, 1:30 PM CDT | Severe Thunderstorm Watch | SPC | Cass, Champaign, Christian, Coles, DeWitt, Douglas and 22 more | 7 hr |
| May 27, 1:52 PM CDT | Mesoscale Discussion | SPC | Adams, Calhoun, Greene, Jersey, Macoupin, Pike and 1 more | 113 min |
| May 27, 2:25 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Clinton, Fayette, Franklin, Greene and 12 more | 7 hr |
| May 27, 3:37 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Clay, Clinton, Edwards, Effingham and 22 more | 113 min |
| May 27, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Clay, Crawford, Cumberland, Edwards, Effingham and 7 more | 4 hr |
| May 27, 5:01 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Clinton, Fayette, Greene, Jackson and 11 more | 89 min |
| May 27, 6:00 PM CDT | Mesoscale Discussion | SPC | Champaign, DeWitt, Douglas, Edgar, Macon, Morgan and 4 more | 90 min |
| May 27, 6:35 PM CDT | Mesoscale Discussion | SPC | Ohio, Switzerland | 25 min |
| May 27, 6:55 PM CDT | Tornado Watch | SPC | Jefferson, Ohio, Switzerland | 5 hr |
Nearby
Mesoscale Discussions in Indiana, 2004Mesoscale Discussions in Illinois, 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.