Alert archive / Indiana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 99, NWS Indianapolis, IN

May 10, 2011Hamilton County, Madison County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at May 10, 2011, 1:58 PM EDT for Hamilton County, Madison County, Indiana. It was in force for 32 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 10, 2011, 1:58 PM EDT (17:58 UTC)
Expired: May 10, 2011, 2:30 PM EDT
In force: 32 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Hamilton County, IN, Madison County, IN

The radar

The Indianapolis radar (KIND), 68 km from the middle of the area, began a volume at 17:59 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 was reported inside it

Time	Report	Where	Remark
May 10, 2:04 PM EDT	HAIL 1.75	6 Sw Elwood, IN
May 10, 2:11 PM EDT	HAIL 1.75	7 S Elwood, IN	HALF DOLLAR TO GOLF BALL SIZE HAIL.
May 10, 2:15 PM EDT	HAIL 1.75	3 S Alexandria, IN
May 10, 2:30 PM EDT	HAIL 1.5	6 N Anderson, IN	1 N PROSPERITY...LOTS OF HAIL COVERING GROUND.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 10, 1:10 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.0 hours before the alert went out and 192 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: 9 J/kg
Mixed-layer CIN: -487 J/kg
Mixed-layer LCL: 1473 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 194 m²/s²
0-3 km storm-relative helicity: 252 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

035 
WUUS53 KIND 101758
SVRIND
INC057-095-101830-
/O.NEW.KIND.SV.W.0099.110510T1758Z-110510T1830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
158 PM EDT TUE MAY 10 2011

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN HAMILTON COUNTY IN CENTRAL INDIANA...
  CENTRAL MADISON COUNTY IN CENTRAL INDIANA...

* UNTIL 230 PM EDT

* AT 154 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL. 
  THIS STORM WAS LOCATED 8 MILES SOUTH OF TIPTON...OR 17 MILES WEST
  OF ANDERSON...AND MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FRANKTON AROUND 220 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN INDIANAPOLIS.

&&

LAT...LON 4012 8559 4017 8602 4022 8599 4023 8590
      4023 8587 4024 8586 4026 8570
TIME...MOT...LOC 1758Z 270DEG 21KT 4018 8595
WIND...HAIL <50MPH 1.50IN

$$

MRD/SMF

1 follow-up statement

426 
WWUS53 KIND 101820
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
220 PM EDT TUE MAY 10 2011

INC057-101830-
/O.CAN.KIND.SV.W.0099.000000T0000Z-110510T1830Z/
HAMILTON-
220 PM EDT TUE MAY 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HAMILTON COUNTY
IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN INDIANAPOLIS.

LAT...LON 4015 8586 4021 8583 4025 8577 4026 8570
      4012 8559
TIME...MOT...LOC 1820Z 263DEG 26KT 4019 8573

$$

INC095-101830-
/O.CON.KIND.SV.W.0099.000000T0000Z-110510T1830Z/
MADISON-
220 PM EDT TUE MAY 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
MADISON COUNTY UNTIL 230 PM EDT...

AT 218 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE 
THUNDERSTORM PRODUCING GOLF BALL SIZE HAIL ABOUT A MILE NORTH OF 
PERKINSVILLE.  THIS STORM WAS LOCATED 6 MILES SOUTHWEST OF 
ALEXANDRIA...OR 7 MILES NORTHWEST OF ANDERSON...MOVING EAST AT 30 
MPH.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF CENTRAL
MADISON COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN INDIANAPOLIS.

&&

LAT...LON 4015 8586 4021 8583 4025 8577 4026 8570
      4012 8559
TIME...MOT...LOC 1820Z 263DEG 26KT 4019 8573
WIND...HAIL <50MPH 1.75IN

$$

MRD/SMF

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 10, 1:05 PM EDT	Special Weather Statement	IND	Clinton	25 min
May 10, 1:10 PM EDT	Severe Thunderstorm Warning	IND	Clinton, Montgomery, Tippecanoe	35 min
May 10, 1:42 PM EDT	Severe Thunderstorm Warning	IND	Hamilton, Hancock, Madison	33 min
May 10, 2:15 PM EDT	Severe Thunderstorm Warning	IND	Delaware, Madison	45 min
May 10, 2:29 PM EDT	Tornado Warning	IND	Delaware, Madison	36 min
May 10, 2:36 PM EDT	Severe Thunderstorm Warning	IND	Delaware, Henry, Madison	24 min
May 10, 2:53 PM EDT	Severe Thunderstorm Warning	IND	Delaware, Randolph	52 min
May 10, 2:56 PM EDT	Severe Thunderstorm Warning	IND	Henry, Madison	18 min
May 10, 3:05 PM EDT	Severe Thunderstorm Warning	IND	Delaware, Madison	40 min
May 10, 3:43 PM EDT	Severe Thunderstorm Warning	IND	Delaware, Randolph	62 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.