Up to 106 On This Date Last Year with Twin Severe Lake Breeze StormsJune 28th, 2013 at 12:54 pm by Chad Evans under Chad's WLFI Weather Blog
On this date last year, we sweltered with a high temperature of 102.5 at WLFI & up to 106 in the viewing area (Monticello hit 106. With sensor over one of the driest areas in the viewing area amidst its wind-blown sandy soil number was propelled that high). Indianapolis International Airport officially hit 104, the official National Weather Service office in Indianapolis reported a high of 108.5, while:
(OFFICIAL INDIANA NOAA NWS COOP & ASOS/AWOS STATIONS)
109 National Weather Service, Indianapolis
107 New Castle
107 Terre Haute
106 Fort Wayne Intl. AP
105 North Vernon
104 Indianapolis Intl. AP
104 Hartford City
102 West Lafayette SP
102 Columbia City
BLAST FROM THE PAST: A BLOG POST FROM THAT EVENING ON JUNE 28, 2012…………
NOTE: Some additional storms are possible Friday through Saturday, as 70s dew points pool along front with temperatures in the 90s to at or above 100. Right now, I have 20% coverage in the forecast for any storms that can pop through the cap. Any storm that can may pop out a microburst &/or hail, given the extreme heating. However, current forecast thinking is for a lot of you to stay dry.
This said, there are some indicators of an organized, bowing cluster of storms developing in Illinois, then maturing & passing through late Friday-Friday evening with a damaging straight-line wind threat. We need to watch this to see if this can occur. If so, than a higher damaging straight-line wind threat with better storm coverage (60%) may evolve, rather than isolated, pulsey, microburst storms.
Subtle shortwave in Nebraska seen right now, may actually be trigger for this storm cluster with damaging winds. This would ride the front into the area. If this can indeed happen, some very welcome rainfall could fall. Something to think about……….& again…………….watch. It is highly unclear if this can occur.
SECOND STORM EVENT OF THE YEAR (AFTER FOUNTAIN & MONTGOMERY TORNADOES): JUNE 28, 2012 TWIN SEVERE LAKE BREEZE STORMS………
HOTTEST DAY SINCE 1988 WITH ARRIVAL OF HIGH DEW POINTS BY EVENING FROM IOWA………….
Temperatures rose to 98-106 in the viewing area Thursday. I recorded 102.5 at WLFI, while the Purdue Airport had 101. John Wiggins informed me he had 103.1 on the southeast side of Lafayette. Mary Anne Best in Remington had 102. Monticello recorded the highest reading with 105.5 with Atlanta at a close second with 105.3! Other impressive temperatures in Indiana included 106 at Fort Wayne, Muncie & Terre Haute, 104 at Indianapolis, 108 at Vincennes & Jasper, Indiana & 107 at Evansville. Decker, south of Vincennes, Indiana hit 112.
The area was extremely capped with low dew points, until higher dew points arrived in the evening as the winds blew over wetter Iowa soils. That moisture pooled ahead of a weak, weak surface cold front in northwestern Illinois.
WEAK FRONT & POTENT LAKE BREEZE FRONT……………CONVERGENCE & A STORM POPPING LIKE POPCORN IN A FRYING PAN……….
Meanwhile, a potent lake breeze front began to surge out from that 60s & 70s water into 100s. As the lake front intersected the weak cold front with dew points as high as 75, the covergence pushed the air upward. This push, combined with the broiling heat & instability, was able to force an updraft through the cap.
A STORM’S BUFFET: RECORD HEAT & ARRIVAL OF JUICY DEW POINTS…………(ONCE IT CAN POKE THROUGH A LID)
With this, the storm sucked up all the extreme heat energy around & another storm formed, riding the lake boundary. Able to overcome cap, as a domino-effect developed, the two storms rode southeastward, producing sporadic 1″ hail from Wheatfield to Mexico & one, perhaps several microbursts from northern Pulaski County to northern Miami County.
WHAT GOES UP QUICKLY, MUCH COME DOWN QUICKLY…………
The extreme heat & arrival of +67 (to as high as 75!) dew points made for tremendous updrafts. Pulsey in nature, what goes up in the storms, must come down, which is the reason for the sporadic wind damage.
THE TWO STORMS’ DEMISE & THE END OF LIFE FINALE: POSSIBLE HEAT BURST………..
Finally, with lake breeze growing more & more diffuse & ill-defined, the strong cap overtook the storms & they totally collapsed within 40 minutes. As they collapsed, the lead storm may have produced a heat burst south of Wabash, Indiana. The collapsing storms actually mixed down dry, dry air of the cap & also compressed the air through gusts, dropping the dew point in Logansport from a peak of 74 to 61!
Glen Means sent me this report of the storm 1 mile south of Peru:
NWS-trained observer data from 1 mile S of Peru: dime sized hail (less than 2 mins) w/.06″ rain and top wind gust measured 37mph. Scattered cloud to cloud lightning, but no ground strikes observed. Sure glad I put the soft screen panels over the frames of my hoop house greenhouses a couple weeks ago for “hail insurance!” Power flickered briefly, but no loss, and no damage reported in southern Miami county that I know of. No heat burst, as temps have remained steadily in the mid-70′s since the brief storm passed overhead. (Tip for gardeners w/hoop houses: camper/porch awning screen panels are a great inexpensive idea to protect sensitive plants from hail and scorching sun during Summer! I protect my citrus and avocado trees this way.)
It appears a microburst, at 2 miles long & about 1.8 miles wide occurred at Twelve Mile, Cass County. The worst of it occurred 1 mile north-northwest of town with winds estimated to 73 mph. The trees & powerlines down in & near town point towards gust to 65 mph. Damage pattern supports microburst with bent corn, downed trees & broken limbs, etc. fanning out from central area from near the barn destruction.
Route 16 was closed for a while as fallen trees blocked the roadway.