Extreme Heat in the Central US Expands to the East; Heavy Rains from the Southern Plains to the Great Lakes

Dangerous, long-lasting heat remains across the Mid-South to Mid-Mississippi Valley, while heat expands into the Northeast for a brief period on Friday. Strong to isolated severe thunderstorms and heavy rain pose a flash flooding threat from from the southern High Plains east to the Great Lakes. Tropical Depression 12W brings heavy rain to Guam & the Marianas through Saturday. Read More >

Overview

A thunderstorm rapidly developed near Mt Pleasant Thursday evening into a high precipitating supercell. This storm produced torrential rain, damaging winds, and large hail in Henry and Jefferson counties in Iowa. Additional storms developed along outflow boundaries which produced heavy rain, lightning, and damaging winds to portions of eastern Iowa.

Radar
Storm Reports

Radar:

Radar Loop - courtesy Iowa Environmental Mesonet

Storm Reports

Interactive Storm Report Map	SPC Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1139 PM CDT THU JUL 20 2017

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

0655 PM     TSTM WND GST     MOUNT PLEASANT MUNICIPA 40.95N 91.52W 
07/20/2017  M56.00 MPH       HENRY              IA   AWOS            

0709 PM     HAIL             MOUNT PLEASANT          40.96N 91.55W 
07/20/2017  E1.00 INCH       HENRY              IA   AMATEUR RADIO   

            TIME ESTIMATED FROM RADAR.

0711 PM     TSTM WND GST     MOUNT PLEASANT          40.96N 91.55W 
07/20/2017  E60.00 MPH       HENRY              IA   TRAINED SPOTTER 

0711 PM     TSTM WND DMG     MOUNT PLEASANT          40.96N 91.55W 
07/20/2017                   HENRY              IA   TRAINED SPOTTER 

            LARGE TREE BRANCH DOWN IN TOWN NEAR MCDONALDS.

0711 PM     HAIL             MOUNT PLEASANT          40.96N 91.55W 
07/20/2017  M0.25 INCH       HENRY              IA   TRAINED SPOTTER 

            VERY HEAVY RAIN FALLING AS WELL.

0716 PM     FLASH FLOOD      MOUNT PLEASANT          40.96N 91.55W 
07/20/2017                   HENRY              IA   TRAINED SPOTTER 

            TORRENTIAL RAIN WITH WATER GETTING INTO HOTEL BUILDING IN
            TOWN.

0723 PM     TSTM WND DMG     MOUNT PLEASANT          40.96N 91.55W 
07/20/2017                   HENRY              IA   TRAINED SPOTTER 

            DUMPSTER FLIPPED OVER AND A FENCE DOWN NEAR HOTEL.

0728 PM     TSTM WND DMG     MOUNT PLEASANT          40.96N 91.55W 
07/20/2017                   HENRY              IA   PUBLIC          

            LARGE BARN BLOWN OVER...REPORT VIA KWQC FACEBOOK.

0740 PM     HAIL             4 W MOUNT PLEASANT      40.96N 91.62W 
07/20/2017  M0.88 INCH       HENRY              IA   PUBLIC          

0740 PM     TSTM WND GST     4 W MOUNT PLEASANT      40.96N 91.62W 
07/20/2017  M55.00 MPH       HENRY              IA   PUBLIC          

0740 PM     HEAVY RAIN       4 W MOUNT PLEASANT      40.96N 91.62W 
07/20/2017  M3.75 INCH       HENRY              IA   PUBLIC          

            RAIN FELL IN PAST 1 HOUR.

0750 PM     TSTM WND DMG     1 N MOUNT PLEASANT      40.97N 91.54W 
07/20/2017                   HENRY              IA   TRAINED SPOTTER 

            LARGE ROAD DETOUR SIGN FLIPPED OVER ALONG WITH A PIECE OF
            FENCE BLOWN DOWN.

0753 PM     HAIL             1 NW MOUNT PLEASANT     40.97N 91.56W 
07/20/2017  E0.25 INCH       HENRY              IA   TRAINED SPOTTER 

0811 PM     HAIL             1 W WASHINGTON          41.30N 91.70W 
07/20/2017  E0.25 INCH       WASHINGTON         IA   TRAINED SPOTTER 

0815 PM     HAIL             WASHINGTON              41.30N 91.69W 
07/20/2017  M0.50 INCH       WASHINGTON         IA   AMATEUR RADIO   

0830 PM     FLASH FLOOD      MOUNT PLEASANT          40.96N 91.55W 
07/20/2017                   HENRY              IA   LAW ENFORCEMENT 

            NUMEROUS STREETS IN TOWN INUNDATED WITH WATER. ONE 
            VEHICLE DISABLED BY WATER AND TOWED IN 500 BLOCK OF N. 
            LINCOLN ST. TIME ESTIMATED.

0832 PM     TSTM WND DMG     LOCKRIDGE               40.99N 91.75W 
07/20/2017                   JEFFERSON          IA   PUBLIC          

            DOWNED POWER LINES.

0940 PM     HAIL             MONTPELIER              41.47N 90.80W 
07/20/2017  E1.25 INCH       MUSCATINE          IA   TRAINED SPOTTER 

1014 PM     TSTM WND GST     DAVENPORT MUNICIPAL AIR 41.62N 90.58W 
07/20/2017  M47.00 MPH       SCOTT              IA   MESONET         

            MEASURED ON NWS OFFICE RSOIS.

1017 PM     TSTM WND DMG     1 NNW DAVENPORT         41.57N 90.61W 
07/20/2017                   SCOTT              IA   TRAINED SPOTTER 

            LARGE TREE LIMBS DOWN.

1019 PM     TSTM WND GST     ELDRIDGE                41.64N 90.57W 
07/20/2017  E70.00 MPH       SCOTT              IA   NWS EMPLOYEE    

1019 PM     TSTM WND DMG     4 NNW DAVENPORT         41.61N 90.63W 
07/20/2017                   SCOTT              IA   NWS EMPLOYEE    

            TREES DOWN.

1020 PM     HAIL             DAVENPORT               41.56N 90.60W 
07/20/2017  E0.25 INCH       SCOTT              IA   PUBLIC          

            JUST NORTH OF KIMBERLY ROAD AND WEST OF DIVISION ST.

1021 PM     TSTM WND GST     DAVENPORT MUNICIPAL AIR 41.62N 90.58W 
07/20/2017  M53.00 MPH       SCOTT              IA   MESONET         

            NWS OFFICE RSOIS.

1029 PM     TSTM WND GST     DAVENPORT MUNICIPAL AIR 41.62N 90.58W 
07/20/2017  M61.00 MPH       SCOTT              IA   ASOS

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Extreme Heat in the Central US Expands to the East; Heavy Rains from the Southern Plains to the Great Lakes

Severe Storm Summary July 20th, 2017