Severe Thunderstorms: June 19th, 2018

Overview

Widespread showers and thunderstorms moved across much of eastern Iowa and northwest Illinois on the afternoon of June 19th. These storms developed thanks to a frontal boundary slowly moving south across the mid Mississippi River Valley.

Some of these thunderstorms became severe across northwest Illinois, and produced damaging winds and torrential rainfall. Reports of downed tree branches, power lines, and substantial crop damage were received out of Henry, Bureau and Putnam counties from winds around 70 MPH. Widespread rainfall amounts of 1-3 inches were also reported thanks to high amounts of moisture in the atmosphere.

Radar Image (4:20 P.M.) (IEM) (Click to zoom) (Click here for Animation)

Wind Damage
Photos
Storm Reports
Environment

Wind Damage:

Macroburst Thunderstorm Wind Event
Bureau County

Date	06/19/2018
Time (Local)	3:25 - 3:42 pm CDT

Est. Peak Winds	70 mph
Path Length	12 miles
Max Width	2 miles (~3500 yards)
Injuries/Deaths	0 / 0
Summary: Thunderstorms moving across southern Bureau County produced wind that flattened corn along a 12 mile swath around 2 miles wide. A gear on a wind turbine was also damaged, causing the unit to stop rotating. (A macroburst is defined as thunderstorm winds causing damage to an area with a radius greater than 2.5 miles)

Track Map

Photos


Corn Damage Along Illinois County Road 700 N (NWS Damage Survey)	Corn Damage Along Illinois County Road 700 N (NWS Damage Survey)	Corn Damage Along Illinois County Road 700 N (NWS Damage Survey)	Corn Damage Along Illinois County Road 700 N (NWS Damage Survey)

Interactive Storm Map	SPC Storm Reports

Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
735 PM CDT TUE JUN 19 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0608 PM     HEAVY RAIN       2 E FAIRFIELD MUNICIPAL 41.05N 91.95W
06/19/2018  M1.00 INCH       JEFFERSON          IA   TRAINED SPOTTER  

            TOTAL RAINFALL TODAY AS OF 6 PM. 

0500 PM     HEAVY RAIN       1 W HENNEPIN            41.25N 89.34W
06/19/2018  M1.78 INCH       PUTNAM             IL   CO-OP OBSERVER   

            24-HR RAINFALL TOTAL. 

0455 PM     HEAVY RAIN       1 NW ELMOVILLE          42.27N 90.06W
06/19/2018  M3.00 INCH       JO DAVIESS         IL   TRAINED SPOTTER  

            TOTAL RAINFALL SINCE MONDAY EVENING. 

0430 PM     HEAVY RAIN       CEDAR RAPIDS MUNICIPALI 41.89N 91.71W
06/19/2018  M1.60 INCH       LINN               IA   ASOS             

            TOTAL RAINFALL AS OF 4PM. 

0430 PM     HEAVY RAIN       SHERRARD                41.32N 90.50W
06/19/2018  M2.50 INCH       MERCER             IL   BROADCAST MEDIA  

            PUBLIC RAINFALL REPORT RELAYED BY WQAD. 

0429 PM     HEAVY RAIN       MOLINE QUAD-CITY AIRPOR 41.45N 90.51W
06/19/2018  M1.53 INCH       ROCK ISLAND        IL   ASOS             

            TOTAL RAINFALL AS OF 4PM. TIES DAILY RECORD 
            RAINFALL OF 1.53 INCHES SET IN 2014. 

0420 PM     TSTM WND DMG     MARK                    41.26N 89.25W
06/19/2018                   PUTNAM             IL   PUBLIC           

            6-8 INCH DIAMETER TREE BRANCH DOWN ON 
            ROADWAY IN MARK, IL. REPORT FROM SOCIAL 
            MEDIA. TIME ESTIMATE BASED ON RADAR. 

0408 PM     HEAVY RAIN       1 W CAMBRIDGE           41.30N 90.20W
06/19/2018  M1.20 INCH       HENRY              IL   TRAINED SPOTTER  

            TOTAL RAINFALL AS OF 4PM. 

0330 PM     TSTM WND DMG     5 SW PROVIDENCE         41.24N 89.66W
06/19/2018                   BUREAU             IL   TRAINED SPOTTER  

            CORN DOWN IN FIELDS. 

0315 PM     HEAVY RAIN       2 E GRIFFIN             41.23N 90.45W
06/19/2018  M1.26 INCH       MERCER             IL   COCORAHS         

            RAINFALL RECEIVED FROM 2:30-3:15PM. 

0309 PM     TSTM WND DMG     CAMBRIDGE               41.30N 90.19W
06/19/2018                   HENRY              IL   UTILITY COMPANY  

            POWER COMPANY REPORTS POWER LINES DOWN IN 
            CAMBRIDGE. 

0300 PM     HEAVY RAIN       2 SW NEW LONDON         40.91N 91.43W
06/19/2018  M1.50 INCH       HENRY              IA   TRAINED SPOTTER  

            TOTAL RAINFALL RECEIVED AS OF 3PM. 

0250 PM     TSTM WND DMG     KEWANEE                 41.24N 89.93W
06/19/2018                   HENRY              IL   EMERGENCY MNGR   

            POWER LINES DOWN IN KEWANEE, RELAYED BY 
            EMERGENCY MANAGEMENT. TIME ESTIMATED BASED 
            ON RADAR. 

0240 PM     TSTM WND DMG     GALVA                   41.17N 90.04W
06/19/2018                   HENRY              IL   EMERGENCY MNGR   

            POWER LINES DOWN IN GALVA. 

0233 PM     TSTM WND DMG     ALPHA                   41.19N 90.38W
06/19/2018                   HENRY              IL   EMERGENCY MNGR   

            POWER LINES DOWN IN ALPHA, RELAYED BY 
            EMERGENCY MANAGEMENT. TIME ESTIMATED BASED 
            ON RADAR. 


&&

$$

Environment

Additional environmental data.


Figure 1: SPC Day 1 Outlook (20:00 UTC)	Figure 2: SPC Day 1 Tornado Outlook (20:00 UTC)	Figure 3: SPC Day 1 Hail Outlook (20:00 UTC)


Figure 4: SPC Day 1 Wind Outlook (20:00 UTC)	Figure 5: DVN Sounding: 6/19/18 12z	Figure 6: DVN Sounding: 6/20/18 00z

Media use of NWS Web News Stories is encouraged!
Please acknowledge the NWS as the source of any news information accessed from this site.