Alert archive / Indiana / Mesoscale Discussions in 2003

Mesoscale Discussion 348

March 28, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2003, 3:30 PM CST for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Mar 28, 2003, 3:30 PM CST (21:30 UTC)
Expired: Mar 28, 2003, 5:30 PM CST
In force: 2 hr
Issued by: the Storm Prediction Center

All 90 counties

Hardin County, IL, Wabash County, IL, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Clinton County, IN, Crawford County, IN, Daviess County, IN, Dearborn County, IN, Decatur County, IN, Delaware County, IN, Dubois County, IN, Fayette County, IN, Floyd County, IN, Franklin County, IN, Gibson County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Harrison County, IN, Hendricks County, IN, Henry County, IN, Jackson County, IN, Jay County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Orange County, IN, Owen County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Spencer County, IN, Sullivan County, IN, Tipton County, IN, Union County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Wayne County, IN, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Caldwell County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Edmonson County, KY, Grayson County, KY, Hancock County, KY, Hardin County, KY, Henderson County, KY, Hopkins County, KY, Jefferson County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, McLean County, KY, Meade County, KY, Muhlenberg County, KY, Ohio County, KY, Oldham County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Trimble County, KY, Union County, KY, Warren County, KY, Webster County, KY, Darke County, OH, Preble County, OH

The radar

The Louisville radar (KLVX), 83 km from the middle of the area, began a volume at 21:31 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

Nashville Metro, TN (KBNA), launched 12:00Z, 9.5 hours before the alert went out and 246 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 822 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 243 m²/s²
0-3 km storm-relative helicity: 251 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.

329 
ACUS11 KWNS 282130
SWOMCD
SPC MCD 282130 
OHZ000-INZ000-KYZ000-TNZ000-ILZ000-282330-

MESOSCALE DISCUSSION 0348
NWS STORM PREDICTION CENTER NORMAN OK
0330 PM CST FRI MAR 28 2003

AREAS AFFECTED...IN/WRN KY

CONCERNING...SEVERE THUNDERSTORM WATCH 81...

VALID 282130Z - 282330Z

DEVELOPING SQUALL-LINE OVER SWRN IN WILL WILL LIKELY INTENSIFY
OVER THE NEXT SEVERAL HOURS. HAIL AND DAMAGING WIND ARE POSSIBLE
WITH THE ACTIVITY AS IT MOVES ACROSS SRN AND CNTRL IN.



THUNDERSTORMS WERE CONTINUING TO DEVELOP ALONG A COLD FRONT WEST
OF AN INSTABILITY AXIS WITH MLCAPE OF 500 TO 1000 J/KG. PRESSURE
GRADIENTS BEHIND THE COLD FRONT NEAR THE IL/IN STATE-LINE WERE
TIGHTENING...INDICATING THE FRONT MAY ACCELERATE EWD...INCREASING
CONVERGENCE ACROSS SWRN IN. AS DEEP LAYER SHEAR
STRENGTHENS...CELLS IN THE DEVELOPING SQUALL-LINE WILL LIKELY
ORGANIZE FURTHER RAISING THE POTENTIAL FOR SEVERE WIND GUSTS OR
HAIL. CAPPING INVERSION ACROSS WRN KY SHOULD CONTINUE TO WEAKEN
AND CONVECTION SHOULD DEVELOP THERE. AS CELLS ORGANIZE...WIND
DAMAGE AND HAIL WILL BE POSSIBLE.  

..BROYLES.. 03/28/2003

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

ATTN...WFO...ILN...LMK...IWX...OHX...IND...PAH...ILX...

36758871 38478785 40388681 40558541 40308424 38548525
36748629 36578767

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 28, 7:35 AM CST	Mesoscale Discussion	SPC	Clark, Edgar, Vermilion	3 hr
Mar 28, 10:22 AM CST	Mesoscale Discussion	SPC	Clark, Crawford, Cumberland, Edgar, Edwards, Gallatin and 13 more	113 min
Mar 28, 1:20 PM CST	Severe Thunderstorm Watch	SPC	Hardin, Wabash	6 hr
Mar 28, 5:27 PM CST	Mesoscale Discussion	SPC	Gallatin, Hardin, Wabash	93 min
Mar 28, 12:20 PM CST	Severe Thunderstorm Watch	SPC	Adams, Allen, Carroll, Cass, DeKalb, Elkhart and 15 more	6 hr
Mar 28, 2:57 PM CST	Mesoscale Discussion	SPC	Adams, Allen, Cass, DeKalb, Elkhart, Fulton and 9 more	2 hr
Mar 28, 11:54 AM CST	Mesoscale Discussion	SPC	Defiance, Fulton, Williams	2 hr

Nearby

Mesoscale Discussions in Indiana, 2003 Mesoscale Discussions in Kentucky, 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.