Alert archive / Indiana / Special Weather Statements in 2011

Special Weather Statement, NWS Indianapolis, IN

April 15, 2011Knox County, Sullivan County, Vigo County, Indiana

NWS Indianapolis, IN issued this special weather statement at Apr 15, 2011, 8:47 PM EDT for Knox County, Sullivan County, Vigo County, Indiana. It was in force for 58 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: Apr 15, 2011, 8:47 PM EDT (00:47 UTC)
Expired: Apr 15, 2011, 9:45 PM EDT
In force: 58 min
Issued by: NWS Indianapolis, IN

Counties Knox County, IN, Sullivan County, IN, Vigo County, IN

The radar

The Evansville,IN radar (KVWX), 72 km from the middle of the area, began a volume at 00:49 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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.8 hours before the alert went out and 165 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: 649 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 756 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 201 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Indianapolis, IN wrote its last area forecast discussion before this special weather statement went out at Apr 15, 8:10 PM EDT, 37 minutes earlier.

Area forecast discussion, Apr 15, 8:10 PM EDT, 37 minutes before

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Hazardous weather outlook, Apr 15, 6:07 PM EDT, 2 hours 40 minutes before

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In the hours before

Special weather statement, Apr 15, 6:10 PM EDT, 2 hours 37 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
610 PM EDT FRI APR 15 2011

INZ021-028>031-035>049-051>057-060>065-067>072-160100-
CARROLL-WARREN-TIPPECANOE-CLINTON-HOWARD-FOUNTAIN-MONTGOMERY-
BOONE-TIPTON-HAMILTON-MADISON-DELAWARE-RANDOLPH-VERMILLION-PARKE-
PUTNAM-HENDRICKS-MARION-HANCOCK-HENRY-VIGO-CLAY-OWEN-MORGAN-
JOHNSON-SHELBY-RUSH-SULLIVAN-GREENE-MONROE-BROWN-BARTHOLOMEW-
DECATUR-KNOX-DAVIESS-MARTIN-LAWRENCE-JACKSON-JENNINGS-
INCLUDING THE CITIES OF...LAFAYETTE...FRANKFORT...KOKOMO...
CRAWFORDSVILLE...ANDERSON...MUNCIE...INDIANAPOLIS...TERRE HAUTE...
SHELBYVILLE...BLOOMINGTON...COLUMBUS...VINCENNES...BEDFORD...
SEYMOUR
610 PM EDT FRI APR 15 2011

...STRONG WIND GUSTS POSSIBLE THIS EVENING...

WINDS MAY GUST TO 40 TO 45 MPH THIS EVENING AS STRONG LOW PRESSURE
APPROACHES THE REGION FROM THE WEST. THIS WILL LIKELY BLOW AROUND
LOOSE OBJECTS AND CREATE DIFFICULT DRIVING CONDITIONS FOR HIGH
PROFILE VEHICLES. USE CAUTION IF DRIVING THIS EVENING.

A DEVELOPING LINE OF THUNDERSTORMS ALONG THE MISSISSIPPI RIVER AT
6 PM WILL LIFT NORTHEAST THROUGH THE EVENING...AND WILL IMPACT THE
WABASH VALLEY AND SOUTHWEST INDIANA AFTER 8 PM. STRONGER WIND
GUSTS ARE POSSIBLE WITH THIS LINE OF THUNDERSTORMS.

RYAN

Special weather statement, Apr 15, 8:47 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
847 PM EDT FRI APR 15 2011

INZ051-060-067-068-160145-
DAVIESS-KNOX-SULLIVAN-VIGO-
847 PM EDT FRI APR 15 2011

...STRONG THUNDERSTORM ADVISORY FOR WESTERN DAVIESS...KNOX...SULLIVAN
AND WESTERN VIGO COUNTIES UNTIL 945 PM EDT/845 PM CDT/...

AT 842 PM EDT/742 PM CDT/...NATIONAL WEATHER SERVICE DOPPLER RADAR
WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 11
MILES WEST OF HARDINVILLE TO 35 MILES SOUTH OF PRINCETON...AND MOVING
NORTHEAST AT 40 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH FREQUENT DANGEROUS LIGHTNING.

THESE STORMS WILL BE NEAR...
DECKER AROUND 920 PM EDT...
VINCENNES UNIVERSITY AND VINCENNES AROUND 925 PM EDT...
MEROM AROUND 930 PM EDT...
TURTLE CREEK RESERVOIR AND GRAYSVILLE AROUND 935 PM EDT...
PRAIRIE CREEK...FAIRBANKS...OAKTOWN...MONROE CITY AND BRUCEVILLE
AROUND 940 PM EDT...
CARLISLE...WHEATLAND AND PAXTON AROUND 945 PM EDT...

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3847 8776 3851 8766 3855 8768 3864 8763
      3874 8751 3886 8756 3896 8754 3899 8759
      3906 8759 3915 8767 3922 8759 3931 8763
      3936 8754 3951 8755 3960 8744 3946 8735
      3855 8721 3853 8748 3849 8750 3841 8774
TIME...MOT...LOC 0047Z 221DEG 33KT 3900 8799 3789 8764

RYAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 9:49 PM EDT	Special Weather Statement	IND	Clay, Daviess, Greene, Vigo	41 min
Apr 15, 10:11 PM EDT	Special Weather Statement	IND	Fountain, Parke, Vermillion	49 min
Apr 15, 10:30 PM EDT	Special Weather Statement	IND	Lawrence, Martin, Monroe, Owen	45 min
Apr 15, 10:36 PM EDT	Special Weather Statement	IND	Montgomery, Owen, Putnam	39 min
Apr 15, 11:17 PM EDT	Special Weather Statement	IND	Brown, Jackson, Johnson, Lawrence, Monroe, Morgan	43 min
Apr 15, 11:43 PM EDT	Special Weather Statement	IND	Hamilton, Hendricks, Marion	47 min
Apr 16, 12:05 AM EDT	Special Weather Statement	IND	Bartholomew, Brown, Jackson, Johnson, Shelby	40 min

Nearby

Special Weather Statements in Indiana, 2011 Every special weather statement 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.