Alert archive / Indiana / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 35, NWS Louisville, KY

May 1, 2010Dubois County, Indiana

NWS Louisville, KY issued this severe thunderstorm warning at May 1, 2010, 2:47 AM EDT for Dubois County, Indiana. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 1, 2010, 2:47 AM EDT (06:47 UTC)
Expired
May 1, 2010, 3:30 AM EDT
In force
43 min
Issued by
NWS Louisville, KY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Dubois County, IN

The radar

The Evansville,IN radar (KVWX), 75 km from the middle of the area, began a volume at 06:48 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.

IssuedProductOfficeLasted
May 1, 2:11 AM EDTTornado WatchSPC6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 6.8 hours before the alert went out and 248 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 2010-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1090 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 2010-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 340 square meters per square second.19395878Sfc1 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
1090 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
718 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
340 m²/s²
0-3 km storm-relative helicity
345 m²/s²
Significant tornado parameter
1.7
Supercell composite
10.4

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Louisville, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at May 1, 12:44 AM EDT, 2 hours 3 minutes earlier.

Area forecast discussion, May 1, 12:44 AM EDT, 2 hours 3 minutes before
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Hazardous weather outlook, Apr 30, 4:11 PM EDT, 10 hours 36 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOUISVILLE KY
411 PM EDT FRI APR 30 2010

INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-061>067-
070>078-081-082-010800-
ORANGE IN-WASHINGTON IN-SCOTT IN-JEFFERSON IN-DUBOIS IN-
CRAWFORD IN-PERRY IN-HARRISON IN-FLOYD IN-CLARK IN-HANCOCK KY-
BRECKINRIDGE KY-MEADE KY-OHIO KY-GRAYSON KY-HARDIN KY-BULLITT KY-
JEFFERSON KY-OLDHAM KY-TRIMBLE KY-HENRY KY-SHELBY KY-FRANKLIN KY-
SCOTT KY-HARRISON KY-SPENCER KY-ANDERSON KY-WOODFORD KY-
FAYETTE KY-BOURBON KY-NICHOLAS KY-NELSON KY-WASHINGTON KY-
MERCER KY-JESSAMINE KY-CLARK KY-LARUE KY-MARION KY-BOYLE KY-
GARRARD KY-MADISON KY-BUTLER KY-EDMONSON KY-HART KY-GREEN KY-
TAYLOR KY-CASEY KY-LINCOLN KY-LOGAN KY-WARREN KY-SIMPSON KY-
ALLEN KY-BARREN KY-MONROE KY-METCALFE KY-ADAIR KY-RUSSELL KY-
CUMBERLAND KY-CLINTON KY-
411 PM EDT FRI APR 30 2010 /311 PM CDT FRI APR 30 2010/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
INDIANA AND CENTRAL KENTUCKY.

.DAY ONE...TONIGHT.

A BAND OF SHOWERS AND THUNDERSTORMS WILL LIKELY REACH SOUTHWEST
INDIANA AND THAT PART OF CENTRAL KENTUCKY WELL WEST OF INTERSTATE 65
BEFORE SUNRISE. THESE STORMS ARE NOT EXPECTED TO BE SEVERE BUT WILL
PRODUCE HEAVY RAINFALL...GUSTY WINDS...LIGHTNING AND POSSIBLY SMALL
HAIL.

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

THE LATEST FORECASTS SUGGEST THAT TWO PERIODS OF ACTIVE WEATHER ARE
EXPECTED FOR THIS WEEKEND. THE FIRST PERIOD OF ACTIVE WEATHER IS
EXPECTED TO DEVELOP EARLY SATURDAY MORNING AS A COLD FRONT STALLS
OUT ACROSS THE AREA. WIDESPREAD SHOWERS AND THUNDERSTORMS ARE
EXPECTED ACROSS THE AREA DURING THIS TIME FRAME. SOME STRONG
THUNDERSTORMS WITH GUSTY WINDS ARE POSSIBLE BUT THE MAIN THREAT
WILL BE HEAVY RAINFALL.

A SECOND PERIOD OF STORMY WEATHER IS EXPECTED TO DEVELOP SUNDAY
MORNING AS A COLD FRONT FINALLY PUSHES THROUGH THE REGION. STRONG TO
SEVERE THUNDERSTORMS ARE LIKELY DURING THIS TIME PERIOD WITH
DAMAGING WINDS...ISOLATED TORNADOES...AND VERY HEAVY RAINFALL.

RAINFALL TOTALS THROUGH THE WEEKEND ARE EXPECTED TO TOTAL BETWEEN
4 AND 6 INCHES IN AREAS WEST OF INTERSTATE 65...WITH 2 TO 4 INCHES
POSSIBLE IN AREAS EAST OF INTERSTATE 65. SOME LOCALLY HIGHER AMOUNTS
IN EXCESS OF 6 INCHES ARE NOT OUT OF THE QUESTION IN SOME AREAS WEST
OF INTERSTATE 65.

THIS EXCESSIVE RAINFALL WILL LIKELY RESULT IN FLOODING
PROBLEMS...THEREFORE A FLASH FLOOD WATCH IS IN EFFECT. IF YOU LIVE
IN A FLOOD PRONE AREA...STAY ABREAST OF THE LATEST FORECASTS
THROUGH THE WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS ANTICIPATED THIS WEEKEND. SPOTTERS AND
EMERGENCY MANAGERS ARE ASKED TO REPORT INSTANCES OF HEAVY
RAINFALL...FLASH FLOODING...AND SEVERE WEATHER TO THE NATIONAL
WEATHER SERVICE IN LOUISVILLE.

DK/AML

In the hours before

Special weather statement, May 1, 2:16 AM EDT, 31 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
216 AM EDT SAT MAY 1 2010

INZ076-083-084-089-KYZ023-024-026-061-070-010815-
ORANGE IN-DUBOIS IN-CRAWFORD IN-PERRY IN-HANCOCK KY-
BRECKINRIDGE KY-OHIO KY-BUTLER KY-LOGAN KY-
INCLUDING THE CITIES OF...PAOLI...JASPER...MARENGO...TELL CITY...
HAWESVILLE...HARDINSBURG...BEAVER DAM...MORGANTOWN...RUSSELLVILLE
216 AM EDT SAT MAY 1 2010 /116 AM CDT SAT MAY 1 2010/

...STRONG STORMS MOVING TOWARDS JASPER TO TELL CITY TO HARTFORD...

AT 215 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A
LINE OF STRONG STORMS NEAR OWENSBORO...AND MOVING NORTHEAST AT 50
MPH. THIS LINE OF STORMS WILL BE LOCATED FROM JASPER TO TELL CITY
TO HARTFORD BY 415 AM.

THIS LINE CONTAINS LARGE QUANTITIES OF CLOUD TO GROUND
LIGHTNING...HEAVY RAIN WITH RAINFALL RATES OF AROUND ONE INCH PER
HOUR...AND STRONG GUSTY WINDS OF 30 TO 40 MPH...ARE EXPECTED WITH
THIS LINE OF STORMS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IF
POSSIBLE. STAY AWAY FROM WINDOWS AND DOORS...AND AVOID USING THE
TELEPHONE UNLESS IT IS AN EMERGENCY.

JDG

The office that day

Everything else NWS Louisville, KY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 1, 4:55 AM EDTSevere Thunderstorm WarningLMKHardin, Meade35 min
May 1, 5:17 AM EDTSevere Thunderstorm WarningLMKLogan28 min
May 1, 5:25 AM EDTSevere Thunderstorm WarningLMKShelby35 min
May 1, 5:34 AM EDTSevere Thunderstorm WarningLMKButler26 min
May 1, 5:37 AM EDTAreal Flood AdvisoryLMKJefferson3 hr
May 1, 5:41 AM EDTSpecial Weather StatementLMKAnderson, Boyle, Bullitt, Fayette, Franklin, Hardin and 15 more79 min
May 1, 5:51 AM EDTSevere Thunderstorm WarningLMKAllen, Butler, Edmonson, Logan, Simpson, Warren39 min
May 1, 6:07 AM EDTAreal Flood AdvisoryLMKBreckinridge, Meade3 hr
May 1, 6:45 AM EDTSpecial Weather StatementLMKAllen, Barren, Green, Hart, Metcalfe, Monroe60 min
May 1, 6:55 AM EDTSpecial Weather StatementLMKAnderson, Bourbon, Boyle, Bullitt, Clark, Fayette and 19 more50 min
May 1, 6:59 AM EDTAreal Flood AdvisoryLMKBullitt, Spencer103 min
May 1, 7:35 AM EDTAreal Flood AdvisoryLMKAnderson, Woodford74 min
May 1, 7:51 AM EDTSpecial Weather StatementLMKBourbon, Boyle, Casey, Clark, Fayette, Garrard and 6 more84 min
May 1, 8:07 AM EDTAreal Flood AdvisoryLMKBourbon, Clark, Fayette, Jessamine62 min
May 1, 9:40 AM EDTSpecial Weather StatementLMKClinton, Cumberland35 min
May 1, 1:05 PM EDTRiver Flood WarningLMKOhio5 days
May 1, 5:04 PM EDTAreal Flood AdvisoryLMKAllen, Barren, Butler, Clinton, Cumberland, Logan and 4 more6 hr
May 1, 3:13 AM EDTSevere Thunderstorm WarningLMKCrawford, Dubois, Orange, Perry32 min
May 1, 3:43 AM EDTAreal Flood AdvisoryLMKDubois, Orange2 hr
May 1, 3:52 AM EDTSevere Thunderstorm WarningLMKClark, Scott, Washington23 min
May 1, 5:50 AM EDTFlash Flood WarningLMKDubois, Orange3 hr

Nearby

Severe Thunderstorm Warnings in Indiana, 2010Every severe thunderstorm warning in 2010

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.