Alert archive / Indiana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 52, NWS Indianapolis, IN

April 9, 20114 counties in Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Apr 9, 2011, 9:31 AM EDT for 4 counties in Indiana. It was in force for 44 min. 1 report 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 9, 2011, 9:31 AM EDT (13:31 UTC)
Expired: Apr 9, 2011, 10:15 AM EDT
In force: 44 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 1.0 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), 72 km from the middle of the area, began a volume at 13:32 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
Apr 9, 9:35 AM EDT	HAIL 0.5	1 W Washington, 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 9, 8:25 AM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 1.5 hours before the alert went out and 200 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: 1370 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 151 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.

927 
WUUS53 KIND 091331
SVRIND
INC027-055-083-153-091415-
/O.NEW.KIND.SV.W.0052.110409T1331Z-110409T1415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
931 AM EDT SAT APR 9 2011

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DAVIESS COUNTY IN SOUTHWEST INDIANA...
  SOUTHWESTERN GREENE COUNTY IN SOUTHWEST INDIANA...
  EASTERN KNOX COUNTY IN SOUTHWEST INDIANA...
  SOUTHEASTERN SULLIVAN COUNTY IN SOUTHWEST INDIANA...

* UNTIL 1015 AM EDT

* AT 928 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 5 MILES EAST OF SULLIVAN TO 7
  MILES NORTH OF PETERSBURG...AND MOVING EAST AT 25 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  VICKSBURG...WASHINGTON AND SANDBORN AROUND 945 AM EDT...
  PLAINVILLE AND LINTON AROUND 950 AM EDT...
  SWITZ CITY...LYONS AND ELNORA AROUND 1000 AM EDT...
  NEWBERRY AND MONTGOMERY AROUND 1005 AM EDT...
  ODON AND CANNELBURG AROUND 1010 AM EDT...

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.

&&

LAT...LON 3852 8730 3904 8732 3913 8718 3901 8702
      3897 8705 3891 8694 3858 8695 3854 8719
      3855 8720 3854 8725 3853 8726
TIME...MOT...LOC 1331Z 255DEG 22KT 3910 8728 3859 8729
WIND...HAIL 60MPH 1.00IN

$$

PUMA

3 follow-up statements

177 
WWUS53 KIND 091341
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
941 AM EDT SAT APR 9 2011

INC027-055-083-153-091415-
/O.CON.KIND.SV.W.0052.000000T0000Z-110409T1415Z/
DAVIESS-GREENE-KNOX-SULLIVAN-
941 AM EDT SAT APR 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR DAVIESS...
EASTERN KNOX...SOUTHWESTERN GREENE AND SOUTHEASTERN SULLIVAN COUNTIES
UNTIL 1015 AM EDT...

AT 937 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTH OF LINTON TO
WASHINGTON...MOVING EAST AT 45 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  ODON...NEWBERRY AND CANNELBURG AROUND 950 AM EDT...

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.

&&

LAT...LON 3852 8730 3904 8732 3913 8718 3901 8702
      3897 8705 3891 8694 3858 8695 3854 8719
      3855 8720 3854 8725 3853 8726
TIME...MOT...LOC 1341Z 259DEG 37KT 3912 8711 3861 8713
WIND...HAIL 60MPH 1.00IN

$$

PUMA

798 
WWUS53 KIND 091350
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
950 AM EDT SAT APR 9 2011

INC153-091400-
/O.CAN.KIND.SV.W.0052.000000T0000Z-110409T1415Z/
SULLIVAN-
950 AM EDT SAT APR 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SULLIVAN COUNTY
IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE 
WARNED AREA.

LAT...LON 3913 8718 3901 8702 3897 8705 3891 8694
      3858 8695 3854 8719 3855 8720
TIME...MOT...LOC 1350Z 259DEG 37KT 3914 8700 3863 8701

$$

INC027-055-083-091415-
/O.CON.KIND.SV.W.0052.000000T0000Z-110409T1415Z/
DAVIESS-GREENE-KNOX-
950 AM EDT SAT APR 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR DAVIESS...
EXTREME NORTHEASTERN KNOX AND CENTRAL GREENE COUNTIES UNTIL 1015 AM
EDT...

AT 947 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 9 MILES NORTHWEST OF BLOOMFIELD
TO 7 MILES EAST OF WASHINGTON...MOVING EAST AT 45 MPH.

SEVERE THUNDERSTORMS WILL AFFECT MAINLY RURAL AREAS OF CENTRAL
GREENE...DAVIESS AND EXTREME NORTHEASTERN KNOX COUNTIES.

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.

&&

LAT...LON 3913 8718 3901 8702 3897 8705 3891 8694
      3858 8695 3854 8719 3855 8720
TIME...MOT...LOC 1350Z 259DEG 37KT 3914 8700 3863 8701
WIND...HAIL 60MPH 1.00IN

$$

PUMA

854 
WWUS53 KIND 091414
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1014 AM EDT SAT APR 9 2011

INC027-055-083-091425-
/O.EXP.KIND.SV.W.0052.000000T0000Z-110409T1415Z/
DAVIESS-GREENE-KNOX-
1014 AM EDT SAT APR 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR DAVIESS...EXTREME NORTHEASTERN
KNOX AND CENTRAL GREENE COUNTIES HAS EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.

LAT...LON 3913 8718 3901 8702 3897 8705 3891 8694
      3858 8695 3854 8719 3855 8720
TIME...MOT...LOC 1415Z 259DEG 37KT 3918 8667 3867 8669

$$

PUMA

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 8:00 AM EDT	Severe Thunderstorm Warning	IND	Knox, Sullivan	45 min
Apr 9, 8:27 AM EDT	Severe Thunderstorm Warning	IND	Clay, Greene, Sullivan, Vigo	48 min
Apr 9, 9:03 AM EDT	Severe Thunderstorm Warning	IND	Greene, Knox, Sullivan	27 min
Apr 9, 9:06 AM EDT	Severe Thunderstorm Warning	IND	Daviess, Knox, Sullivan	39 min
Apr 9, 9:09 AM EDT	Severe Thunderstorm Warning	IND	Clay, Owen, Putnam, Vigo	51 min
Apr 9, 9:22 AM EDT	Severe Thunderstorm Warning	IND	Greene, Monroe, Owen	38 min
Apr 9, 9:47 AM EDT	Flash Flood Warning	IND	Greene, Owen, Sullivan, Vigo	5 hr
Apr 9, 10:10 AM EDT	Flash Flood Warning	IND	Brown, Daviess, Lawrence, Martin, Monroe	4 hr
Apr 9, 10:21 AM EDT	Severe Thunderstorm Warning	IND	Jackson, Lawrence	39 min
Apr 9, 12:00 PM EDT	River Flood Warning	IND	Lawrence, Martin	8 days
Apr 9, 12:00 PM EDT	River Flood Warning	IND	Daviess, Gibson, Knox, Pike	37 days

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.