Overview
On the evening of July 15 a derecho brought very strong winds, several tornadoes, and heavy rainfall to a good portion of the Midwest. Thunderstorms initiated over central Iowa during the late afternoon hours then quickly spread east-southeast through southern Wisconsin, the northern half of Illinois, southern Michigan, and the northern/central Indiana. Significant tree damage, some structural damage, and a few tornadoes resulted from the event with observed wind speeds of 111 mph in Dunlap, IL (Peoria County) & 105 mph near Speer, Illinois (Stark/Marshall County line). Back building of storms during the overnight hours brought very heavy rainfall and flash flooding near and south of a Galesburg to Sullivan line. The heaviest rain fell over Fulton and Mason counties where 4-7"+ were reported. The last time a derecho impacted central parts of Illinois was back on June 29, 2023.
Derecho definition: (pronounced deh-REY-cho) is a widespread, long-lived wind storm 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.
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Tornadoes:
Tornado - East Peoria/Morton
Track Map |
Tornado - LOCATION
Track Map Downloadable KMZ File |
Tornado - LOCATION
Track Map Downloadable KMZ File |
Tornado - LOCATION
Track Map Downloadable KMZ File |
Tornado - LOCATION
Track Map Downloadable KMZ File |
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 |
Photos & Video
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Radar
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Rain Reports
Public Information Statement National Weather Service Lincoln IL 1155 AM CDT Wed Jul 17 2024 ...JULY 15-16, 2023 RAIN REPORTS... Location Amount Time/Date Lat/Lon ...Illinois... ...Christian County... 1 SSW Pana 2.27 in 0600 AM 07/16 39.37N/89.09W ...Effingham County... 1 NE Watson 2.64 in 0800 AM 07/16 39.03N/88.56W 2 NNW Dieterich 2.30 in 0800 AM 07/16 39.09N/88.39W 1 SSE Effingham 2.22 in 0700 AM 07/16 39.11N/88.53W ...Fulton County... 2 SSE Fiatt 7.80 in 0700 AM 07/16 40.53N/90.15W Cuba 7.50 in 0800 AM 07/16 40.49N/90.19W Lewistown 6.86 in 0800 AM 07/16 40.40N/90.16W Lewistown 6.86 in 0220 AM 07/16 40.40N/90.16W Bryant 6.69 in 0800 AM 07/16 40.47N/90.09W 1 SSW Canton 5.34 in 0700 AM 07/16 40.54N/90.04W Avon 4.38 in 0700 AM 07/16 40.66N/90.44W ...Jasper County... Yale 2.09 in 0800 AM 07/16 39.12N/88.03W ...Logan County... New Holland 2.82 in 0800 AM 07/16 40.18N/89.58W Mount Pulaski 2.36 in 0450 AM 07/16 40.01N/89.28W Mount Pulaski 2.36 in 0600 AM 07/16 40.01N/89.28W ...Macon County... 2 E Decatur 5.50 in 0800 AM 07/16 39.84N/88.91W Long Creek 3.50 in 0800 AM 07/16 39.80N/88.85W 2 W Decatur 3.45 in 0800 AM 07/16 39.84N/88.99W 2 NW Harristown 3.37 in 0800 AM 07/16 39.86N/89.11W 2 SE Latham 2.90 in 0800 AM 07/16 39.95N/89.14W ...Mason County... 3 E Havana 6.06 in 0800 AM 07/16 40.30N/90.00W ...Menard County... 1 E Oakford 4.00 in 0800 AM 07/16 40.10N/89.95W 1 N Petersburg 3.06 in 0800 AM 07/16 40.03N/89.85W 3 N Salisbury 2.36 in 0600 AM 07/16 39.93N/89.80W ...Moultrie County... Sullivan 3.70 in 0700 AM 07/16 39.60N/88.61W ...Peoria County... 2 NE Alta 2.75 in 0800 AM 07/16 40.84N/89.61W ...Sangamon County... Grandview 4.00 in 0800 AM 07/16 39.82N/89.62W 2 W Riverton 2.98 in 0800 AM 07/16 39.85N/89.58W 1 WSW Sherman 2.50 in 0600 AM 07/16 39.89N/89.62W Williamsville 2.40 in 0800 AM 07/16 39.95N/89.55W 4 SSE Southern View 2.04 in 0800 AM 07/16 39.71N/89.61W Pawnee 2.00 in 0800 AM 07/16 39.59N/89.58W ...Shelby County... 3 S Moweaqua 2.64 in 0600 AM 07/16 39.59N/89.02W 1 ENE Shelbyville 2.30 in 0800 AM 07/16 39.41N/88.80W 1 N Windsor 2.17 in 0600 AM 07/16 39.45N/88.60W ...Tazewell County... 3 S Kingston Mines 2.60 in 0800 AM 07/16 40.51N/89.78W Observations are collected from a variety of sources with varying equipment and exposures. We thank all volunteer weather observers for their dedication. Not all data listed are considered official. $$
Additional Information
The Forecast
SPC Day 3 Categorical Outlook | SPC Day 3 Probabilistic Outlook | SPC Day 2 Categorical Outlook | SPC Day 2 Probabilistic Outlook |
SPC Day 1 Categorical Outlook | SPC Day 1 Tornado Outlook | SPC Day 1 Hail Outlook | SPC Day 1 Wind Outlook |
Warning Lead Time
Counties & Issuance Time | Lead Time |
Summaries from other NWS Offices
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