Overview
A cluster of storms ahead of a cold front moved through central Kentucky on Halloween evening. These storms caused flooding, strong winds, and an EF-1 tornado south of Rineyville in Hardin County, KY. Halloween Tornado Climate Fact: The last tornado that touched down on October 31 was an F2 in Casey County, KY in 1934. |
Tornado:
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Rineyville, KY
Track Map
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The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:
EF0 Weak 65-85 mph |
EF1 Moderate 86-110 mph |
EF2 Significant 111-135 mph |
EF3 Severe 136-165 mph |
EF4 Extreme 166-200 mph |
EF5 Catastrophic 200+ mph |
Flooding
Hydrographs
Elkhorn Creek at Peaks Mill, KY, went into flood stage | Muscatatuck River at Deputy, IN, came close to flood stage, with a fast rise. |
Radar/Photos
An estimate of total rainfall using gauges and radar data from the MRMS (Multi-Radar Multi-Sensor) database |
Storm Reports:
0500 PM HEAVY RAIN 2 N GEORGETOWN 38.23N 84.55W 10/31/2018 M1.74 INCH SCOTT KY COCORAHS 1.74 INCHES SINCE 1:30 PM. 0508 PM HEAVY RAIN TELL CITY 37.95N 86.76W 10/31/2018 M1.90 INCH PERRY IN TRAINED SPOTTER 0513 PM HEAVY RAIN 1 E FRANKFORT 38.19N 84.84W 10/31/2018 M2.50 INCH FRANKLIN KY PUBLIC 0530 PM TSTM WND DMG BEAVER DAM 37.41N 86.88W 10/31/2018 OHIO KY EMERGENCY MNGR 4 TREES AND MULTIPLE POWER LINES DOWN. 0539 PM TSTM WND DMG 1 SSE RINEYVILLE 37.73N 85.95W 10/31/2018 HARDIN KY EMERGENCY MNGR CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 SSE RINEYVILLE. SEVERAL BUILDINGS DAMAGED AND TREES DOWN. 0539 PM TORNADO 2 SSW RINEYVILLE 37.73N 85.98W 10/31/2018 HARDIN KY NWS STORM SURVEY EF-1 TORNADO 2.5 MILES LONG/80 YARDS WIDE WITH MAX WINDS OF 100 MPH DAMAGED OUTBUILDINGS, ROOFS/SIDING ON HOMES, A TRAVEL TRAILER, AND ANOTHER VEHICLE SOUTH OF RINEYVILLE. 0540 PM HEAVY RAIN 3 E TAYLORSVILLE 38.04N 85.30W 10/31/2018 M1.96 INCH SPENCER KY PUBLIC 0545 PM HEAVY RAIN 2 NNE GEORGETOWN 38.22N 84.54W 10/31/2018 M2.25 INCH SCOTT KY EMERGENCY MNGR MULTIPLE AUTOMOBILE ACCIDENTS REPORTED BY EMA FROM PEOPLE HYDROPLANING ON INTERSTATE 75 NEAR GEORGETOWN. A NEARBY COCORAHS OBSERVER REPORTED TOTAL RAINFALL OF 2.25 INCHES THIS AFTERNOON. 0603 PM TSTM WND DMG 2 WSW BOSTON 37.77N 85.70W 10/31/2018 NELSON KY 911 CALL CENTER TREE DOWN BLOCKING BOSTON RD NEAR THE HARDIN COUNTY LINE. TIME ESTIMATED FROM RADAR. 0624 PM TSTM WND DMG 1 ENE NAZARETH 37.84N 85.45W 10/31/2018 NELSON KY 911 CALL CENTER TREE DOWN BLOCKING VIRGINIA AVE. TIME ESTIMATED FROM RADAR. 0640 PM TSTM WND DMG 3 NNE FAIRFIELD 37.97N 85.36W 10/31/2018 SPENCER KY EMERGENCY MNGR CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 3 NNE FAIRFIELD. 1 TREE DOWN. WATER OVER SOME ROADS THAT TYPICALLY FLOOD. 0800 PM HEAVY RAIN 2 N GEORGETOWN 38.23N 84.55W 10/31/2018 M2.91 INCH SCOTT KY COCORAHS STORM TOTAL SINCE 130 PM EDT. 1000 PM HEAVY RAIN TAYLORSVILLE 38.03N 85.34W 10/31/2018 M2.78 INCH SPENCER KY TRAINED SPOTTER 1026 PM HEAVY RAIN 3 WNW MILLVILLE 38.15N 84.87W 10/31/2018 M4.37 INCH FRANKLIN KY TRAINED SPOTTER 1125 PM HEAVY RAIN 1 E FRANKFORT 38.19N 84.85W 10/31/2018 M3.80 INCH FRANKLIN KY PUBLIC 0200 AM FLOOD 1 N HUDSON 37.67N 86.29W 11/01/2018 BRECKINRIDGE KY 911 CALL CENTER FAIRFIELD-HUDSON ROAD CLOSED. 0600 AM HEAVY RAIN 3 SSW DOE VALLEY 37.96N 86.12W 11/01/2018 M2.97 INCH MEADE KY CO-OP OBSERVER 24 HOUR RAINFALL. 0600 AM HEAVY RAIN 2 W FORKS OF ELKHORN 38.22N 84.83W 11/01/2018 M2.60 INCH FRANKLIN KY CO-OP OBSERVER 24 HOUR RAINFALL. 0700 AM HEAVY RAIN 1 WNW TELL CITY 37.95N 86.77W 11/01/2018 E3.89 INCH PERRY IN CO-OP OBSERVER 24 HOUR RAINFALL. 0700 AM HEAVY RAIN 1 NW LEAVENWORTH 38.21N 86.36W 11/01/2018 M3.12 INCH CRAWFORD IN CO-OP OBSERVER 24 HOUR RAINFALL. 0700 AM HEAVY RAIN 2 NNW WAKEFIELD 38.00N 85.31W 11/01/2018 M2.98 INCH SPENCER KY CO-OP OBSERVER TAYLORSVILLE LAKE 24 HOUR RAINFALL. 0700 AM HEAVY RAIN 3 W BIG SPRING 37.79N 86.23W 11/01/2018 E2.72 INCH BRECKINRIDGE KY CO-OP OBSERVER 24 HOUR RAINFALL. 0700 AM HEAVY RAIN 4 ESE HILLVIEW 38.05N 85.62W 11/01/2018 M2.65 INCH BULLITT KY CO-OP OBSERVER 24 HOUR RAINFALL. 0700 AM HEAVY RAIN BEECHWOOD 38.20N 86.42W 11/01/2018 M2.47 INCH CRAWFORD IN CO-OP OBSERVER 24 HOUR RAINFALL. 0700 AM HEAVY RAIN 1 E PARIS 38.20N 84.24W 11/01/2018 M2.18 INCH BOURBON KY CO-OP OBSERVER 0700 AM HEAVY RAIN 1 NW LOUISVILLE 38.27N 85.78W 11/01/2018 M2.00 INCH JEFFERSON KY OTHER FEDERAL 24 HOUR RAINFALL AT MCALPINE LOCK AND DAM. 0859 AM HEAVY RAIN 2 ENE HARTFORD 37.46N 86.85W 11/01/2018 M3.35 INCH OHIO KY MESONET 24 HOUR RAINFALL. 0900 AM HEAVY RAIN ROFF 37.65N 86.44W 11/01/2018 M3.86 INCH BRECKINRIDGE KY CO-OP OBSERVER 24 HOUR RAINFALL. 0901 AM HEAVY RAIN 4 WSW MILLVILLE 38.12N 84.88W 11/01/2018 M2.91 INCH FRANKLIN KY MESONET KENTUCKY MESONET 24 HOUR RAINFALL. 0902 AM HEAVY RAIN 3 NW EKRON 37.96N 86.22W 11/01/2018 M2.88 INCH MEADE KY MESONET KENTUCKY MESONET 24 HOUR RAINFALL. 0904 AM HEAVY RAIN 2 NE MCQUADY 37.72N 86.49W 11/01/2018 M2.73 INCH BRECKINRIDGE KY MESONET KENTUCKY MESONET 24 HOUR RAINFALL. 0905 AM HEAVY RAIN 3 ESE MILLERSBURG 38.28N 84.10W 11/01/2018 M2.58 INCH NICHOLAS KY MESONET KENTUCKY MESONET 24 HOUR RAINFALL. 0907 AM HEAVY RAIN 1 N CLERMONT 37.93N 85.65W 11/01/2018 M2.31 INCH BULLITT KY MESONET KENTUCKY MESONET 24 HOUR RAINFALL. 0930 AM FLOOD LAWRENCEBURG 38.04N 84.89W 11/01/2018 ANDERSON KY EMERGENCY MNGR SOME LOW WATER CROSSINGS WITH WATER OVER THEM. 1008 AM HEAVY RAIN 4 SSW SIMPSONVILLE 38.17N 85.38W 11/01/2018 M2.02 INCH SHELBY KY MESONET KENTUCKY MESONET 24 HOUR RAINFALL. 1024 AM HEAVY RAIN 1 N LITTLE YORK 38.71N 85.90W 11/01/2018 M2.20 INCH WASHINGTON IN PUBLIC
Rain Reports
Figure 1: 2-day rainfall total for the Louisville metro area | Figure 2: 2-day rainfall totals for the NWS Louisville county warning area. | Figure 3: 2-day rainfall totals for the state of Kentucky |
Environment
A slow-moving cold front stalled over the Ohio Valley Wednesday, Halloween. Multiple disturbances riding over the top of this system helped to bring plenty of rainfall to parts of the region as well as a brief bout of thunderstorms during Trick or Treat time.
Figure 1: Frontal boundary draped across the Ohio River, with plenty of moist air coming in from the southwest. | Figure 2: Surface observations showing that frontal boundary, south winds over most of KY and north winds IN/IL. | Figure 3: A measure of how much moisture is over the region, precipitable water, showing an axis of higher values over the Ohio Valley. |
The environment was not overly primed for severe weather, but one storm was able to get organized enough to drop a quick EF-1 tornado near Rineyville as well as cause some damage downstream in Elizabethtown, Boston, and Nazareth, KY.
Figure 4: Environment had some instability to work with. Area did end up with some thunderstorms. | Figure 5: Lifting Condensation Level (LCL) shows where cloud bases are lower. For high bases, tornadoes have a tough time making it to the ground. | Figure 6: Storm-relative helicity (SRH) in the layer from the surface up to 1 km above. Higher values indicate more spin in the atmosphere. |
Figure 7: Significant Tornado Parameter (STP), a relatively new parameter showing which areas have potential for stronger tornadoes. |
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