Alert archive / Indiana / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 331

June 18, 201447 counties in Indiana; 12 counties in Kentucky; 26 counties in Ohio

The Storm Prediction Center issued this severe thunderstorm watch at Jun 18, 2014, 11:40 PM EDT for 47 counties in Indiana; 12 counties in Kentucky; 26 counties in Ohio. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 18, 2014, 11:40 PM EDT (03:40 UTC)
Expired
Jun 19, 2014, 6:06 AM EDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
65 kt
All 85 counties

Adams County, IN, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Clark County, IN, Clinton County, IN, Dearborn County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jackson County, IN, Jay County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Ohio County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Switzerland County, IN, Tipton County, IN, Union County, IN, Wabash County, IN, Washington County, IN, Wayne County, IN, Wells County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Henry County, KY, Kenton County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Trimble County, KY, Adams County, OH, Brown County, OH, Butler County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Darke County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Hocking County, OH, Licking County, OH, Madison County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Ross County, OH, Scioto County, OH, Shelby County, OH, Warren County, OH

The radar

The Indianapolis radar (KIND), 58 km from the middle of the area, began a volume at 03:43 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
10%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
10%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 18, 11:43 PM EDTSevere Thunderstorm WarningINDBoone, Clinton, Hamilton, Madison, Montgomery47 min
Jun 19, 1:43 AM EDTSevere Thunderstorm WarningILNChampaign, Logan, Miami, Shelby47 min
Jun 19, 2:10 AM EDTSevere Thunderstorm WarningILNChampaign, Delaware, Franklin, Madison, Union50 min
Jun 19, 2:29 AM EDTSevere Thunderstorm WarningILNClark, Franklin, Madison, Pickaway46 min
Jun 19, 2:38 AM EDTSevere Thunderstorm WarningILNDelaware, Franklin, Licking52 min
Jun 19, 4:25 AM EDTSevere Thunderstorm WarningIWXBlackford, Grant35 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 3.7 hours before the alert went out and 158 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 00:00Z on 2014-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1181 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 00:00Z on 2014-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1181 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
1621 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
112 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

Open this sounding in Storm Lab

The text

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

539 
WWUS20 KWNS 190342
SEL1  
SPC WW 190342
INZ000-KYZ000-OHZ000-191100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 331
NWS STORM PREDICTION CENTER NORMAN OK
1140 PM EDT WED JUN 18 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
  CENTRAL...SOUTHERN AND EASTERN INDIANA
  EXTREME NORTHERN KENTUCKY
  SOUTHWESTERN AND WESTERN OHIO

* EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1140
  PM UNTIL 700 AM EDT.

* PRIMARY THREATS INCLUDE...
  SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 75
    MPH POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
STATUTE MILES EITHER SIDE OF A LINE FROM 40 MILES WEST NORTHWEST
OF MUNCIE INDIANA TO 40 MILES SOUTH OF CINCINNATI OHIO.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU1).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 326...WW 327...WW
328...WW 329...WW 330...

DISCUSSION...BOWING MCS HAS DEVELOPED ENOUGH OF AN ORGANIZED COLD
POOL TO PERSIST ACROSS MUCH OF ERN/SERN INDIANA AND PERHAPS INTO
ADJOINING PORTION OH/KY...AIDED BY LIFT AND FAVORABLY UNSTABLE
LOW-LEVEL INFLOW ALONG AND NE OF ANTECEDENT OUTFLOW BOUNDARY. 
DAMAGING WIND WILL BE PRIMARY CONCERN.  SOME POTENTIAL ALSO EXISTS
FOR THIS COMPLEX TO EXPAND SWWD OR EWD WHILE REMAINING MAINLY
FORWARD-PROPAGATIONAL...THEREFORE WW IS BROADER THAN CURRENT LATERAL
EXTENT OF COMPLEX.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 31035.


...EDWARDS

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 18, 10:29 PM EDTMesoscale DiscussionSPCBenton, Boone, Carroll, Cass, Clinton, Delaware and 21 more61 min
Jun 19, 1:52 AM EDTMesoscale DiscussionSPCDearborn, Decatur, Fayette, Franklin, Ohio, Ripley and 3 more83 min
Jun 18, 9:06 PM EDTMesoscale DiscussionSPCBoyd, Carter, Greenup, Lewis, Mason54 min

Nearby

Severe Thunderstorm Watches in Indiana, 2014Severe Thunderstorm Watches in Ohio, 2014Severe Thunderstorm Watches in Kentucky, 2014Every severe thunderstorm watch in 2014

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.