Alert archive / Indiana / Areal Flood Warnings in 2011

Areal Flood Warning 20, NWS Indianapolis, IN

April 23, 20115 counties in Indiana

NWS Indianapolis, IN issued this areal flood warning at Apr 23, 2011, 12:17 AM EDT for 5 counties in Indiana. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 23, 2011, 12:17 AM EDT (04:17 UTC)
Expired
Apr 23, 2011, 6:30 AM EDT
In force
6 hr
Issued by
NWS Indianapolis, IN
Area
Storm-based polygon
Flood severity
None

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

The radar

The Evansville,IN radar (KVWX), 83 km from the middle of the area, began a volume at 04:18 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, 4.3 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2011-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 342 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2011-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 351 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
342 J/kg
Mixed-layer CIN
-152 J/kg
Mixed-layer LCL
492 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
351 m²/s²
0-3 km storm-relative helicity
346 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 areal flood warning went out at Apr 22, 8:50 PM EDT, 3 hours 27 minutes earlier.

Area forecast discussion, Apr 22, 8:50 PM EDT, 3 hours 27 minutes before
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Hazardous weather outlook, Apr 22, 11:26 AM EDT, 12 hours 51 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1126 AM EDT FRI APR 22 2011

INZ021-028>031-035>038-043-044-231000-
CARROLL-WARREN-TIPPECANOE-CLINTON-HOWARD-FOUNTAIN-MONTGOMERY-
BOONE-TIPTON-VERMILLION-PARKE-
1126 AM EDT FRI APR 22 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A FLOOD WATCH IS IN EFFECT TODAY THROUGH 6 PM EDT SATURDAY.
ADDITIONAL THUNDERSTORMS WITH HEAVY RAIN OVER ALREADY SATURATED
GROUND MAY RESULT IN FLOODING. ONE TO LOCALLY TWO INCHES OF
RAINFALL IS POSSIBLE BY DAYBREAK SATURDAY.

THUNDERSTORMS WILL EXPAND INTO THE AREA THIS AFTERNOON AND
CONTINUE INTO TONIGHT. SOME THUNDERSTORMS MAY BE SEVERE LATER THIS
AFTERNOON AND EVENING...WITH DAMAGING WINDS AND LARGE HAIL AS THE
MAIN THREATS. A FEW TORNADOES WILL ALSO BE POSSIBLE. DEADLY CLOUD-
TO-GROUND LIGHTNING IS ALSO EXPECTED. THE GREATEST POTENTIAL FOR
SEVERE WEATHER WILL EXIST FROM MID AFTERNOON THROUGH MIDNIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

A FLOOD WATCH IS IN EFFECT THROUGH SATURDAY AFTERNOON. MORE
THUNDERSTORMS ARE EXPECTED OVER THE WEEKEND AND THROUGH THE MIDDLE
OF NEXT WEEK AS THE FRONTAL BOUNDARY REMAINS ACROSS THE OHIO VALLEY.
REPEATED CHANCES FOR HEAVY RAINFALL WILL EXIST THROUGH THURSDAY
WITH THE SATURATED GROUND...ADDITIONAL RAINFALL MAY EXACERBATE
FLOODING. IT IS TOO SOON TO DETERMINE IF THESE STORMS WILL BE
SEVERE. LIGHTNING IS A THREAT WITH ANY THUNDERSTORM.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT.

&&

MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND
CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL
LOWERCASE)

INZ039>042-045>049-051>057-231000-
HAMILTON-MADISON-DELAWARE-RANDOLPH-PUTNAM-HENDRICKS-MARION-
HANCOCK-HENRY-VIGO-CLAY-OWEN-MORGAN-JOHNSON-SHELBY-RUSH-
1126 AM EDT FRI APR 22 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A FLOOD WATCH IS IN EFFECT TODAY THROUGH 6 PM EDT SATURDAY.
ADDITIONAL THUNDERSTORMS WITH HEAVY RAIN OVER ALREADY SATURATED
GROUND MAY RESULT IN FLOODING. ONE TO LOCALLY TWO INCHES OF
RAINFALL IS POSSIBLE BY DAYBREAK SATURDAY.

THUNDERSTORMS WILL EXPAND INTO THE AREA THIS AFTERNOON AND
CONTINUE INTO TONIGHT. SOME THUNDERSTORMS MAY BE SEVERE LATER THIS
AFTERNOON AND TONIGHT...WITH DAMAGING WINDS AND LARGE HAIL AS THE
MAIN THREATS. A FEW TORNADOES WILL ALSO BE POSSIBLE. DEADLY CLOUD-
TO-GROUND LIGHTNING IS ALSO EXPECTED. THE GREATEST POTENTIAL FOR
SEVERE WEATHER WILL EXIST FROM MID AFTERNOON THROUGH DAYBREAK
SATURDAY MORNING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

A FLOOD WATCH IS IN EFFECT THROUGH SATURDAY AFTERNOON. MORE
THUNDERSTORMS ARE EXPECTED OVER THE WEEKEND AND THROUGH THE MIDDLE
OF NEXT WEEK AS THE FRONTAL BOUNDARY REMAINS ACROSS THE OHIO VALLEY.
REPEATED CHANCES FOR HEAVY RAINFALL WILL EXIST THROUGH THURSDAY
WITH THE SATURATED GROUND...ADDITIONAL RAINFALL MAY EXACERBATE
FLOODING. IT IS TOO SOON TO DETERMINE IF THESE STORMS WILL BE
SEVERE. LIGHTNING IS A THREAT WITH ANY THUNDERSTORM.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT.

&&

MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND
CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL
LOWERCASE)

INZ060>065-067>072-231000-
SULLIVAN-GREENE-MONROE-BROWN-BARTHOLOMEW-DECATUR-KNOX-DAVIESS-
MARTIN-LAWRENCE-JACKSON-JENNINGS-
1126 AM EDT FRI APR 22 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A FLOOD WATCH IS IN EFFECT TODAY THROUGH 6 PM EDT SATURDAY.
ADDITIONAL THUNDERSTORMS WITH HEAVY RAIN OVER ALREADY SATURATED
GROUND MAY RESULT IN FLOODING. ONE TO LOCALLY THREE INCHES OF
RAINFALL IS POSSIBLE BY DAYBREAK SATURDAY.

THUNDERSTORMS WILL EXPAND INTO THE AREA THIS AFTERNOON AND
CONTINUE INTO TONIGHT. SOME THUNDERSTORMS MAY BE SEVERE THIS
AFTERNOON AND TONIGHT...WITH DAMAGING WINDS AND LARGE HAIL AS THE
MAIN THREATS. A FEW TORNADOES WILL ALSO BE POSSIBLE. DEADLY CLOUD-
TO-GROUND LIGHTNING IS ALSO EXPECTED. THE GREATEST POTENTIAL FOR
SEVERE WEATHER WILL EXIST FROM EARLY AFTERNOON THROUGH DAYBREAK
SATURDAY MORNING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

A FLOOD WATCH IS IN EFFECT THROUGH SATURDAY AFTERNOON. MORE
THUNDERSTORMS ARE EXPECTED OVER THE WEEKEND AND THROUGH THE MIDDLE
OF NEXT WEEK AS THE FRONTAL BOUNDARY REMAINS ACROSS THE OHIO
VALLEY. REPEATED CHANCES FOR HEAVY RAINFALL WILL EXIST THROUGH
THURSDAY WITH THE SATURATED GROUND...ADDITIONAL RAINFALL MAY
EXACERBATE FLOODING. IT IS TOO SOON TO DETERMINE IF THESE STORMS
WILL BE SEVERE. LIGHTNING IS A THREAT WITH ANY THUNDERSTORM.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT.

&&

MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND
CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL
LOWERCASE)

RYAN

In the hours before

Special weather statement, Apr 22, 11:00 PM EDT, 1 hour 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1100 PM EDT FRI APR 22 2011

INZ061-067>069-230330-
DAVIESS-GREENE-KNOX-MARTIN-
1100 PM EDT FRI APR 22 2011

...STRONG THUNDERSTORM ADVISORY FOR NORTHERN DAVIESS...NORTHERN
MARTIN...NORTHEASTERN KNOX AND SOUTHEASTERN GREENE COUNTIES UNTIL
1130 PM EDT...

AT 1058 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM 8 MILES NORTH OF WASHINGTON...OR 19 MILES EAST
OF VINCENNES...MOVING NORTHEAST AT 45 MPH.

HAIL UP TO THE SIZE OF NICKELS IS EXPECTED WITH THIS STORM...ALONG
WITH HEAVY RAIN.

THIS STORM WILL BE NEAR...
ELNORA AROUND 1110 PM EDT...
ODON AND NEWBERRY AROUND 1115 PM EDT...
CRANE AND BURNS CITY AROUND 1120 PM EDT...
OWENSBURG AROUND 1130 PM EDT...

THIS STORM MAY INTENSIFY....AND A TORNADO WATCH IS IN EFFECT FOR
MUCH OF THIS AREA. 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.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

&&

LAT...LON 3885 8729 3900 8694 3895 8671 3887 8670
      3883 8670 3866 8724
TIME...MOT...LOC 0300Z 247DEG 40KT 3879 8716

50
Special weather statement, Apr 22, 11:33 PM EDT, 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1133 PM EDT FRI APR 22 2011

INZ054-055-062>064-230400-
BARTHOLOMEW-BROWN-JOHNSON-MONROE-MORGAN-
1133 PM EDT FRI APR 22 2011

...STRONG THUNDERSTORM ADVISORY FOR NORTHERN MONROE...NORTHERN
BROWN...NORTHWESTERN BARTHOLOMEW...SOUTHEASTERN MORGAN AND
SOUTHWESTERN JOHNSON COUNTIES UNTIL MIDNIGHT EDT...

AT 1125 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM 6 MILES WEST OF BLOOMINGTON...MOVING NORTHEAST
AT 60 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THIS STORM.

THIS STORM WILL BE NEAR...
LAKE LEMON AND YELLOWWOOD LAKE AROUND 1140 PM EDT...
HELMSBURG...MAHALASVILLE AND NASHVILLE AROUND 1145 PM EDT...
SPEARSVILLE...BEANBLOSSOM AND MORGANTOWN AROUND 1150 PM EDT...
PRINCES LAKES...PEOGA AND TRAFALGAR AROUND 1155 PM EDT...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

&&

LAT...LON 3946 8608 3925 8598 3909 8656 3926 8666
TIME...MOT...LOC 0333Z 246DEG 51KT 3922 8649

JH

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 22, 8:37 PM EDTRiver Flood WarningINDShelby7 days
Apr 22, 8:37 PM EDTRiver Flood WarningINDClay, Greene8 days
Apr 22, 11:00 PM EDTSpecial Weather StatementINDDaviess30 min
Apr 22, 11:33 PM EDTSpecial Weather StatementINDBrown, Monroe27 min
Apr 22, 11:37 PM EDTSevere Thunderstorm WarningINDBrown, Johnson, Monroe23 min
Apr 23, 12:01 AM EDTSevere Thunderstorm WarningINDDelaware, Madison29 min
Apr 23, 12:37 AM EDTSevere Thunderstorm WarningINDBrown, Greene, Lawrence, Monroe23 min
Apr 23, 12:48 AM EDTSevere Thunderstorm WarningINDDelaware, Henry, Randolph27 min
Apr 23, 12:52 AM EDTTornado WarningINDBrown, Jackson, Lawrence, Monroe23 min
Apr 23, 1:14 AM EDTSevere Thunderstorm WarningINDBartholomew, Brown, Decatur, Jackson, Jennings31 min
Apr 23, 1:33 AM EDTTornado WarningINDBartholomew, Jackson, Jennings42 min
Apr 23, 1:47 AM EDTSevere Thunderstorm WarningINDDecatur28 min
Apr 23, 6:48 AM EDTAreal Flood WarningINDJackson, Jennings6 hr
Apr 23, 11:25 AM EDTRiver Flood WarningINDCarroll, Tippecanoe, White6 hr
Apr 23, 12:22 PM EDTAreal Flood WarningINDDaviess, Knox, Lawrence, Martin6 hr
Apr 23, 1:08 PM EDTAreal Flood WarningINDJackson, Jennings6 hr
Apr 23, 1:27 PM EDTFlash Flood WatchINDBartholomew, Boone, Brown, Carroll, Clay, Clinton and 33 more5 days

Nearby

Areal Flood Warnings in Indiana, 2011Every areal flood 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.