Alert archive / Indiana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 4, NWS Indianapolis, IN

February 28, 2011Hamilton County, Hendricks County, Marion County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Feb 28, 2011, 1:59 AM EST for Hamilton County, Hendricks County, Marion County, Indiana. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Feb 28, 2011, 1:59 AM EST (06:59 UTC)
Expired: Feb 28, 2011, 2:30 AM EST
In force: 31 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Hamilton County, IN, Hendricks County, IN, Marion County, IN

The radar

The Indianapolis radar (KIND), 22 km from the middle of the area, began a volume at 06:59 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 28, 12:46 AM EST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 7.0 hours before the alert went out and 206 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: 124 J/kg
Mixed-layer CIN: -220 J/kg
Mixed-layer LCL: 494 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

895 
WUUS53 KIND 280659
SVRIND
INC057-063-097-280730-
/O.NEW.KIND.SV.W.0004.110228T0659Z-110228T0730Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
159 AM EST MON FEB 28 2011

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN HAMILTON COUNTY IN CENTRAL INDIANA...
  HENDRICKS COUNTY IN CENTRAL INDIANA...
  NORTHERN MARION COUNTY IN CENTRAL INDIANA...

* UNTIL 230 AM EST

* AT 155 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR DANVILLE...OR 24 MILES WEST
  OF INDIANAPOLIS...AND MOVING EAST AT 55 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PITTSBORO AND AVON AROUND 205 AM EST...
  BROWNSBURG AND CLERMONT AROUND 210 AM EST...
  EAGLE CREEK RESERVOIR AND SPEEDWAY AROUND 215 AM EST... 
  WILLIAMS CREEK...MERIDIAN HILLS...BROAD RIPPLE AND INDIANA STATE
  FAIRGROUNDS AROUND 225 AM EST...
  CASTLETON AROUND 230 AM EST...

THIS INCLUDES INTERSTATE 65 BETWEEN MILE MARKERS 114 AND 128.

THIS INCLUDES INTERSTATE 69 BETWEEN MILE MARKERS 0 AND 8.

THIS INCLUDES INTERSTATE 74 BETWEEN MILE MARKERS 59 AND 73.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 3993 8593 3993 8595 3988 8595 3988 8596
      3984 8597 3966 8662 3982 8670 3983 8670
      3994 8639 3993 8626 3998 8625 4007 8600
TIME...MOT...LOC 0658Z 248DEG 47KT 3978 8655
WIND...HAIL 60MPH <.75IN

$$

50

1 follow-up statement

493 
WWUS53 KIND 280714
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
214 AM EST MON FEB 28 2011

INC057-063-097-280730-
/O.CON.KIND.SV.W.0004.000000T0000Z-110228T0730Z/
HAMILTON-HENDRICKS-MARION-
214 AM EST MON FEB 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR HENDRICKS...
NORTHERN MARION AND SOUTHWESTERN HAMILTON COUNTIES UNTIL 230 AM
EST...

AT 209 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 6 MILES SOUTHWEST OF DANVILLE TO FISHERS...MOVING EAST AT 55
MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  AVON AND NORTH CROWS NEST AROUND 220 AM EST...
  BROAD RIPPLE...ROCKY RIPPLE...CROWS NEST AND CASTLETON AROUND 225
  AM EST...
  SPRING HILL...WYNNEDALE...SPEEDWAY AND GEIST RESERVOIR AROUND 230
  AM EST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 3993 8593 3993 8595 3988 8595 3988 8596
      3984 8597 3966 8662 3982 8670 3983 8670
      3994 8639 3993 8626 3998 8625 4007 8600
TIME...MOT...LOC 0714Z 248DEG 47KT 3972 8652 3999 8592
WIND...HAIL 60MPH <.75IN

$$

50

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 27, 9:32 PM EST	Severe Thunderstorm Warning	IND	Boone, Clinton, Hamilton, Howard, Montgomery, Tipton	43 min
Feb 27, 10:14 PM EST	Special Weather Statement	IND	Fountain, Tippecanoe	31 min
Feb 27, 10:46 PM EST	Severe Thunderstorm Warning	IND	Boone, Hamilton, Hendricks, Marion, Morgan, Owen and 1 more	44 min
Feb 27, 11:05 PM EST	Severe Thunderstorm Warning	IND	Fountain, Montgomery, Parke, Putnam, Vermillion	40 min
Feb 27, 11:46 PM EST	Special Weather Statement	IND	Boone	29 min
Feb 28, 12:31 AM EST	Areal Flood Warning	IND	Boone, Clay, Fountain, Hendricks, Marion, Montgomery and 7 more	42 hr
Feb 28, 12:35 AM EST	Areal Flood Warning	IND	Boone, Decatur, Delaware, Hamilton, Hancock, Henry and 5 more	42 hr
Feb 28, 1:08 AM EST	Tornado Warning	IND	Bartholomew, Brown, Johnson, Monroe, Morgan	37 min
Feb 28, 1:25 AM EST	Tornado Warning	IND	Delaware, Randolph	35 min
Feb 28, 1:29 AM EST	Areal Flood Warning	IND	Delaware, Henry, Randolph	41 hr
Feb 28, 2:08 AM EST	Tornado Warning	IND	Clay, Hendricks, Morgan, Owen, Parke, Putnam and 1 more	37 min
Feb 28, 2:19 AM EST	Tornado Warning	IND	Delaware, Henry, Madison, Randolph	26 min
Feb 28, 2:24 AM EST	Areal Flood Warning	IND	Boone, Clinton, Delaware, Hamilton, Howard, Madison and 1 more	40 hr
Feb 28, 2:33 AM EST	Severe Thunderstorm Warning	IND	Hamilton, Hancock, Hendricks, Madison, Marion, Morgan and 1 more	27 min
Feb 28, 2:38 AM EST	Tornado Warning	IND	Hendricks, Marion, Morgan, Putnam	37 min
Feb 28, 2:43 AM EST	Tornado Warning	IND	Delaware, Henry, Randolph	32 min
Feb 28, 3:42 AM EST	Severe Thunderstorm Warning	IND	Hancock, Henry, Rush, Shelby	48 min
Feb 28, 4:05 AM EST	Severe Thunderstorm Warning	IND	Bartholomew, Decatur, Rush, Shelby	40 min
Feb 28, 5:22 AM EST	River Flood Warning	IND	Delaware, Madison	56 hr
Feb 28, 5:22 AM EST	River Flood Warning	IND	Hamilton, Madison	62 hr
Feb 28, 5:22 AM EST	River Flood Warning	IND	Hamilton, Marion	4 days
Feb 28, 5:22 AM EST	River Flood Warning	IND	Marion, Morgan	4 days
Feb 28, 5:22 AM EST	River Flood Warning	IND	Marion, Morgan	4 days
Feb 28, 5:22 AM EST	River Flood Warning	IND	Clay, Greene	62 hr
Feb 28, 11:18 AM EST	River Flood Warning	IND	Morgan, Owen	10 days
Feb 28, 11:18 AM EST	River Flood Warning	IND	Morgan, Owen	10 days
Feb 28, 11:18 AM EST	River Flood Warning	IND	Shelby	50 hr
Feb 28, 11:18 AM EST	River Flood Warning	IND	Montgomery, Parke	35 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.