Alert archive / Indiana / Mesoscale Discussions in 2003

Mesoscale Discussion 985

May 14, 200334 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at May 14, 2003, 7:56 PM EST for 34 counties in Indiana. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 14, 2003, 7:56 PM EST (00:56 UTC)
Expired: May 14, 2003, 10:00 PM EST
In force: 2 hr
Issued by: the Storm Prediction Center

All 34 counties

Adams County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Delaware County, IN, Fayette County, IN, Fountain County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Montgomery County, IN, Parke County, IN, Randolph County, IN, Rush County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells County, IN, White County, IN, Whitley County, IN

The radar

The Indianapolis radar (KIND), 80 km from the middle of the area, began a volume at 00:58 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 00:00Z, 0.9 hours before the alert went out and 195 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: 1529 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1142 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 91 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.

096 
ACUS11 KWNS 150056
SWOMCD
SPC MCD 150056 
OHZ000-INZ000-150300-

MESOSCALE DISCUSSION 0985
NWS STORM PREDICTION CENTER NORMAN OK
0756 PM CDT WED MAY 14 2003

AREAS AFFECTED...CENTRAL/SRN IND AND WRN OH

CONCERNING...SEVERE THUNDERSTORM WATCH 372...

VALID 150056Z - 150300Z

WELL DEVELOPED MCV/BOW ECHO CIRCULATION OVER FAR WRN IND WILL
CONTINUE TO TRACK SEWD BETWEEN 30-35 KTS INTO CENTRAL IND OVER THE
NEXT 1-2 HOURS. DAMAGING WINDS WILL REMAIN THE PRIMARY THREAT WITH
THIS CONVECTION...ALTHOUGH AN ISOLATED TORNADO WILL BE POSSIBLE
ALONG THE LEADING EDGE OF THE BOW HEAD AS IT TRACKS INTO THE NRN
INDIANAPOLIS SUBURBS AROUND 15/02Z. ADDITIONAL ELEVATED SEVERE
THUNDERSTORMS WILL BE POSSIBLE OVER ECENTRAL IND WITH MARGINALLY
SEVERE HAIL THE PRIMARY THREAT. THE 00Z ILN SOUNDING SUGGESTS LESS
STEEP LAPSE RATES IN THE 700-500 MB LAYER FARTHER EAST AND THIS
SHOULD LIMIT EWD EXTENT OF SEVERE THREAT OUT OF WW 372 FOR AT LEAST
THE NEXT SEVERAL HOURS.


..CROSBIE.. 05/15/2003

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

ATTN...WFO...ILN...IWX...IND...LOT...

39808746 40788745 40888627 41228608 41048481 39438481

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 14, 8:15 PM EST	Mesoscale Discussion	SPC	Posey, Vanderburgh	60 min
May 14, 8:30 PM EST	Severe Thunderstorm Watch	SPC	Posey	4 hr
May 14, 9:24 PM EST	Mesoscale Discussion	SPC	Bartholomew, Brown, Clark, Clay, Daviess, Dearborn and 25 more	96 min
May 15, 10:15 AM EST	Severe Thunderstorm Watch	SPC	Clark, Crawford, Dearborn, Dubois, Floyd, Harrison and 12 more	6 hr
May 15, 2:20 PM EST	Mesoscale Discussion	SPC	Clark, Floyd, Harrison, Ohio, Switzerland	85 min

Nearby

Mesoscale Discussions in Indiana, 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.