Alert archive / Indiana / Mesoscale Discussions in 2003

Mesoscale Discussion 1549

June 29, 2003Douglas County, Edgar County, Illinois; 26 counties in Indiana; 9 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jun 29, 2003, 1:56 PM CDT for Douglas County, Edgar County, Illinois; 26 counties in Indiana; 9 counties in Ohio. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Jun 29, 2003, 1:56 PM CDT (18:56 UTC)
Expired: Jun 29, 2003, 3:30 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center

All 37 counties

Douglas County, IL, Edgar County, IL, Boone County, IN, Clay County, IN, Clinton County, IN, Delaware County, IN, Fayette County, IN, Fountain County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Jay County, IN, Johnson County, IN, Madison County, IN, Marion County, IN, Montgomery County, IN, Morgan County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Tipton County, IN, Union County, IN, Vermillion County, IN, Vigo County, IN, Wayne County, IN, Champaign County, OH, Clark County, OH, Darke County, OH, Greene County, OH, Logan County, OH, Miami County, OH, Montgomery County, OH, Preble County, OH, Shelby County, OH

The radar

The Indianapolis radar (KIND), 40 km from the middle of the area, began a volume at 18:55 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.9 hours before the alert went out and 196 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 44 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 1328 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

271 
ACUS11 KWNS 291856
SWOMCD
SPC MCD 291856 
OHZ000-INZ000-ILZ000-292030-

MESOSCALE DISCUSSION 1549
NWS STORM PREDICTION CENTER NORMAN OK
0156 PM CDT SUN JUN 29 2003

AREAS AFFECTED...E CENTRAL IL...CENTRAL INDIANA...W CENTRAL OH

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 291856Z - 292030Z

ISOLATED DAMAGING GUSTS AND LARGE HAIL WILL BE POSSIBLE THE NEXT FEW
HOURS. THIS AREA IS BEING MONITORED FOR A POSSIBLE WW IN THE NEXT
HOUR OR SO.

SCATTERED STRONG/SEVERE STORMS WILL DEVELOP ALONG A PRE-FRONTAL
TROUGH FROM E CENTRAL IL EWD ACROSS CENTRAL INDIANA TO W CENTRAL OH
THE NEXT COUPLE OF HOURS.  CONVECTIVE INHIBITION HAS BEEN ERODED
WITHIN THE AXIS OF MODERATE INSTABILITY ALONG THIS BOUNDARY /MLCAPE
VALUES OF 1000-1500 J/KG/...AND 0-6 KM SHEAR OF 40-45 KT IS ALSO
PRESENT OVER THIS SAME AREA.  THEREFORE...A FEW OF THE STORMS MAY 
DEVELOP SUPERCELL CHARACTERISTICS.  THE MORE INTENSE STORMS COULD
PRODUCE DAMAGING GUSTS AND LARGE HAIL THROUGH THE LATE AFTERNOON
HOURS.

..THOMPSON.. 06/29/2003

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...ILN...IWX...IND...ILX...

40308668 40458489 40478382 40258342 39618371 39438582
39338765 39638854 40048850

Nearby

Mesoscale Discussions in Indiana, 2003 Mesoscale Discussions in Ohio, 2003 Mesoscale Discussions in Illinois, 2003 Every 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.