Swells and high surf from both Imelda and Humberto are expected to bring dangerous marine conditions and rip currents to much of the East Coast over the next several days. A series of Pacific frontal systems will bring waves of showers and thunderstorms to portions of northern California and the Pacific Northwest through midweek. Read More >
Overview
A derecho moved from Iowa southeast into Indiana during the evening of July 15 and early morning of July 16. For central Indiana, the derecho brought wind gusts of 75 mph to parts of the area as well as downed trees and power lines. This derecho also produced a small gustnado near Atlanta, IN along the leading edge of strongest winds. The last time a derecho impacted central parts of Indiana was back on June 29, 2023.
Derecho definition: (pronounced deh-REY-cho) is a widespread, long-lived windstorm associated with a band of rapidly moving showers and thunderstorms. A storm is classified as a derecho if wind damage swatch extends more than 240 miles and has wind gusts of at least 58 mph or greater most of the length of the storm's path.
Links to other summaries:
Radar
Selected images from the event. A radar loop of the derecho from Iowa to Indiana is below.
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| Radar at 11:50 PM EDT | Radar at 12:50 AM EDT | Radar at 1:20 AM EDT |
Radar Loop of the Derecho. Image courtesy of WFO Lincoln, IL. Time on image
is in Central Daylight Time.
Storm Reports
Preliminary Local Storm Report
National Weather Service Indianapolis IN
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1151 PM Tstm Wnd Gst 1 SW Purdue University 40.42N 86.93W
07/15/2024 M75 MPH Tippecanoe IN ASOS
ASOS station KLAF W. Lafayette - Purdue
Univ. Arpt.
1151 PM Tstm Wnd Dmg 1 NW West Lafayette 40.46N 86.93W
07/15/2024 Tippecanoe IN Public
Delayed report. Drone photos received of
tree damage.
1159 PM Tstm Wnd Dmg Purdue University 40.43N 86.92W
07/15/2024 Tippecanoe IN Emergency Mngr
A couple of trees snapped.
1222 AM Tstm Wnd Dmg Russiaville 40.42N 86.27W
07/16/2024 Howard IN Public
Delayed report. Several trees snapped.
1235 AM Tstm Wnd Dmg 3 W Kokomo 40.47N 86.20W
07/16/2024 Howard IN Public
Delayed report. Numerous reports of trees
uprooted or snapped with downed powerlines
towards the southwest portions of the
county.
1239 AM Tstm Wnd Dmg 1 NW Kokomo 40.49N 86.15W
07/16/2024 Howard IN Public
Report from mPING: 1-inch tree limbs broken;
Shingles blown off.
1243 AM Tstm Wnd Gst Westfield 40.05N 86.13W
07/16/2024 E55 MPH Hamilton IN Amateur Radio
1240 AM Tstm Wnd Dmg Tipton 40.28N 86.04W
07/16/2024 Tipton IN 911 Call Center
Tree on house. Time estimated.
1240 AM Tstm Wnd Dmg 3 SW Sharpsville 40.35N 86.13W
07/16/2024 Tipton IN 911 Call Center
Semi blown over on US 31. Time estimated
from radar.
1240 AM Tstm Wnd Dmg Atlanta 40.21N 86.03W
07/16/2024 Hamilton IN Public
Delayed report. Approximately 2 mile path of downed trees
and tree limbs with a barn also damaged by gustnado.
1244 AM Tstm Wnd Dmg 1 SW Cicero 40.11N 86.04W
07/16/2024 Hamilton IN Public
Delayed report. Tree snapped.
0100 AM Tstm Wnd Dmg 1 E Carmel 39.97N 86.09W
07/16/2024 Hamilton IN NWS Employee
At least one large tree down with multiple
large branches down throughout the nearby
area. Time estimated from radar.
0104 AM Tstm Wnd Gst 1 SW Indianapolis Int`l 39.72N 86.30W
07/16/2024 M58 MPH Marion IN ASOS
ASOS station KIND Indianapolis.
0115 AM Tstm Wnd Dmg Indianapolis 39.78N 86.15W
07/16/2024 Marion IN Law Enforcement
Multiple reports of power lines down in
Indianapolis.
Environment
Insert synoptic summary.
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| Figure 1: Mixed Layer CAPE at 11:00 PM, showing very high values for the time of day. | Figure 2: Mid Level Lapse Rates at 11:00 PM | Figure 3: 0-1km Shear at 11:00 PM |
Satellite Loop (courtesy of CSU/CIRA):
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