July Summary

Though no tornadoes struck southern Indiana or central Kentucky in July (keeping the total for 2014 so far at just 1, an EF0 in May), the month was a bit stormier than previous months this year.  The first significant event occurred on the 7th when a small thunderstorm produced a microburst between Lyndon and Graymoor-Devondale in Jefferson County, Kentucky.  Winds gusted to near hurricane force and tore down many trees.

A very similar thing happened on the 14th in Casey County.  Once again, a local thunderstorm developed and produced a  very strong downburst.  This time winds reached 85 mph over a small area a few miles southeast of Liberty.  Many trees were felled and there was some minor structural damage.

The final weekend of the month saw the most widespread severe weather as several rounds of powerful thunderstorms swept the region. The first storms came in the form of a squall line, traveling from the Wabash Valley southeastward across southern Indiana and central Kentucky during the evening hours of Saturday the 26th.  Trees and power lines were taken down by strong winds in the counties of Breckinridge, Meade, Jefferson KY, Bullitt, Nelson, Shelby, LaRue, Taylor, Casey, Lincoln, and Madison.  Fort Knox measured a 59 mph wind gust.

As that area of storms was exiting to the southeast shortly after midnight on the 27th, the next cluster of storms was already forming to our northwest.  This next round of storms first appeared near Evansville and then grew in size and intensity as it headed into southern central Indiana and central Kentucky.  Plus, additional storms repeatedly redeveloped on the backside of these storms, resulting in several hours of very stormy weather during the morning hours on Sunday.   These storms were prolific hail producers, with large hail reported in the counties of Spencer, Fayette, Woodford, Harrison KY, and Boyle.  The hail was almost as large as pool balls  near Mount Eden and Versailles.  In addition to the hail, the storms generated strong and damaging winds in LaRue, Trimble, Scott KY, Fayette, Clark KY, Madison, and Nicholas counties.  The worst damage by far took place on the north side of Lexington as downburst winds to 95 mph roared through neighborhoods tearing down trees and damaging homes in the Oakwood Estates and Highlands Park neighborhoods.

After those storms moved off to the east, another batch of storms developed over eastern and southeastern sections of central Kentucky during the afternoon and evening.  Hail once again fell, this time affecting the counties of Metcalfe, Cumberland, and Russell.  Golf ball sized hail was reported just outside Jamestown.  Trees and power lines were ripped down by strong winds in the counties of Russell, Cumberland, Clinton, and Logan.

In addition to severe weather, temperatures were also of interest during the month.  Though there were some hot days, with temperatures reaching the 90s in the LMK CWA on 12 days of the month, there were three periods of unusually cool weather that gave us a welcome break from summer heat.  The first took place from the 3rd to the 6th, with morning lows in the 50s (and even a few upper 40s here and there) and daily average temperatures 5 to 10 degrees cooler than normal.  We had one of the nicest Independence Days in recent memory with highs in the lower 80s, lows in the 50s, and plenty of sunshine.

The second cool-down occurred from the 15th to the 19th.  This time highs were mostly in the 70s with lows once again in the 50s with a few upper 40s scattered around.  The cool weather peaked on the 16th with average daily temperatures 10 to 15 degrees below normal.

The final bout of unusually cool summer weather was from the 28th to 30th with temperatures about ten degrees under normal.

Lexington and Frankfort actually managed to count up a few heating degrees days (HDD)!  Since 1872, Lexington has had 26 Julys with HDD.  The record for July is 11 in 1947.  The most recent previous July with HDD was in 2009 when there were 3.  Since 1895, Frankfort has had 17 Julys with HDD.  The record is 4 in 1937 and 1972.  In 2009 there were 3.

  Average Temperature Departure from Normal Precipitation Departure from Normal
Bowling Green  75.0°  - 3.7° 2.53"  - 1.57"
Frankfort  71.9°  - 4.4° 3.03"  - 1.36"
Lexington  73.3°  - 2.9° 3.23"  - 1.42"
Louisville Bowman  74.6°  - 3.2° 3.81"  - 0.36"
Louisville International  75.8°  - 3.5° 3.61"  - 0.62"



17th:  Record low of 51° and record cool high of 78° at Frankfort
18th:  Record cool high of 71° at Bowling Green
19th:  Record cool high of 74° at Frankfort
25th:  Record low of 53° at Frankfort
28th:  Record cool high of 73° at Frankfort
29th:  Record low of 54° at Louisville, 51° at Lexington, and 50° at Frankfort

Frankfort's 2nd coolest July on record
Bowling Green's 6th coolest July on record

Louisville downburst

Downburst damage between Lyndon and Graymoor-Devondale on the 7th.  Tim Hargis/WAVE

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