Alert archive / Indiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 88, NWS Indianapolis, IN

April 28, 20124 counties in Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Apr 28, 2012, 5:26 PM EDT for 4 counties in Indiana. It was in force for 49 min. 6 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: Apr 28, 2012, 5:26 PM EDT (21:26 UTC)
Expired: Apr 28, 2012, 6:15 PM EDT
In force: 49 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Daviess County, IN, Greene County, IN, Knox County, IN, Sullivan County, IN

The radar

The Evansville,IN radar (KVWX), 78 km from the middle of the area, began a volume at 21:27 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
Apr 28, 5:30 PM EDT	HAIL 0.5	5 Se Oaktown, IN
Apr 28, 5:30 PM EDT	HAIL 0.5	5 Sw Oaktown, IN
Apr 28, 5:41 PM EDT	HAIL 0.88	Oaktown, IN
Apr 28, 5:46 PM EDT	HAIL 1	3 E Oaktown, IN
Apr 28, 5:53 PM EDT	HAIL 1	Bicknell, IN
Apr 28, 5:57 PM EDT	HAIL 1.75	Bicknell, IN

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
Apr 28, 4:33 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.4 hours before the alert went out and 167 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: 1019 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 681 m²/s²
0-3 km storm-relative helicity: 811 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

601 
WUUS53 KIND 282126
SVRIND
INC027-055-083-153-282215-
/O.NEW.KIND.SV.W.0088.120428T2126Z-120428T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
526 PM EDT SAT APR 28 2012

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN DAVIESS COUNTY IN SOUTHWEST INDIANA...
  SOUTHWESTERN GREENE COUNTY IN SOUTHWEST INDIANA...
  NORTHEASTERN KNOX COUNTY IN SOUTHWEST INDIANA...
  SOUTHERN SULLIVAN COUNTY IN SOUTHWEST INDIANA...

* UNTIL 615 PM EDT

* AT 522 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
  LOCATED NEAR FLAT ROCK...OR 6 MILES SOUTHEAST OF ROBINSON...AND
  MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LINTON...
  OAKTOWN...
  PAXTON...
  CARLISLE...
  FREELANDVILLE...
  BICKNELL...
  PLEASANTVILLE...
  EDWARDSPORT...
  SANDBORN...
  PLAINVILLE...
  LYONS...
  SWITZ CITY...
  ELNORA...
  NEWBERRY...
  MONTGOMERY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS 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 3906 8757 3906 8699 3866 8705 3881 8752
      3885 8753 3886 8756 3889 8755 3892 8752
      3896 8752 3897 8753 3898 8758 3905 8758
TIME...MOT...LOC 2127Z 282DEG 32KT 3894 8759
WIND...HAIL 60MPH 1.50IN

$$

50

1 follow-up statement

524 
WWUS53 KIND 282142
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
542 PM EDT SAT APR 28 2012

INC027-055-083-153-282215-
/O.CON.KIND.SV.W.0088.000000T0000Z-120428T2215Z/
DAVIESS-GREENE-KNOX-SULLIVAN-
542 PM EDT SAT APR 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
DAVIESS...SOUTHWESTERN GREENE...NORTHEASTERN KNOX AND SOUTHERN
SULLIVAN COUNTIES UNTIL 615 PM EDT...

AT 541 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PING PONG BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 9 MILES SOUTHEAST OF SULLIVAN TO
6 MILES EAST OF RUSSELLVILLE...MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  LINTON...PLEASANTVILLE...FREELANDVILLE...BICKNELL...EDWARDSPORT...
  SANDBORN...LYONS...SWITZ CITY...PLAINVILLE...ELNORA AND NEWBERRY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3906 8757 3906 8699 3866 8705 3881 8752
      3885 8753 3886 8756 3889 8755 3892 8752
      3896 8752 3897 8753 3898 8758 3905 8758
TIME...MOT...LOC 2142Z 283DEG 29KT 3899 8731 3884 8741
WIND...HAIL 60MPH 1.50IN

$$

50

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 5:39 PM EDT	Flash Flood Warning	IND	Knox, Sullivan	3 hr
Apr 28, 5:59 PM EDT	Tornado Warning	IND	Daviess, Knox, Martin	31 min
Apr 28, 6:28 PM EDT	Tornado Warning	IND	Daviess, Lawrence, Martin	19 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2012 Every severe thunderstorm warning in 2012

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.