Severe Thunderstorm Summary: May 2, 2018

Overview

Thunderstorms developed during the late afternoon and evening hours ahead of a cold front draped across central Iowa.

Some of these thunderstorms became severe, producing hail between the size of a quarter and half dollar. The largest hail fell in Carroll County. There were also several reports of wind damage.

Radar Image (7:45 P.M.) (IEM) (Click to zoom) (Click here for Animation)

Photos & Video
Storm Reports
Environment

Photos & Video

More Pictures Coming Soon!


Quarter to Half Dollar Size Hail 4 W Morrison, IL. Time ~ 6:15 P.M.(Photo credit to Gateway Area Storm Chasers)	()	()	()

Interactive Storm Map	SPC Storm Reports

Storm Reports

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

0523 PM     HAIL             3 SE SAVANNA            42.06N 90.09W 
05/02/2018  M1.00 INCH       CARROLL            IL   TRAINED SPOTTER 

0530 PM     HAIL             4 W MOUNT CARROLL       42.09N 90.05W 
05/02/2018  M0.75 INCH       CARROLL            IL   TRAINED SPOTTER 

0535 PM     HAIL             4 SSE MOUNT CARROLL     42.05N 89.94W 
05/02/2018  M1.00 INCH       CARROLL            IL   TRAINED SPOTTER 

0553 PM     HAIL             4 N HITT                42.05N 89.73W 
05/02/2018  M1.25 INCH       CARROLL            IL   TRAINED SPOTTER 

0554 PM     HAIL             5 NNE HITT              42.07N 89.70W 
05/02/2018  E2.00 INCH       CARROLL            IL   PUBLIC          

            VIA FACEBOOK...DELAYED REPORT.

0554 PM     HAIL             CLINTON                 41.84N 90.23W 
05/02/2018  M1.00 INCH       CLINTON            IA   CO-OP OBSERVER  

            DELAYED REPORT

0600 PM     HAIL             2 ESE CLINTON           41.83N 90.21W 
05/02/2018  M0.75 INCH       CLINTON            IA   TRAINED SPOTTER 

0621 PM     HAIL             MORRISON                41.81N 89.97W 
05/02/2018  M1.00 INCH       WHITESIDE          IL   TRAINED SPOTTER 

0625 PM     HAIL             MORRISON                41.81N 89.97W 
05/02/2018  M1.75 INCH       WHITESIDE          IL   TRAINED SPOTTER 

0627 PM     HAIL             1 WNW MORRISON          41.81N 89.98W 
05/02/2018  M1.50 INCH       WHITESIDE          IL   TRAINED SPOTTER 

0657 PM     HAIL             PARNELL                 41.58N 92.00W 
05/02/2018  M0.25 INCH       IOWA               IA   TRAINED SPOTTER 

0704 PM     TSTM WND DMG     2 N WHAT CHEER          41.43N 92.35W 
05/02/2018                   KEOKUK             IA   EMERGENCY MNGR  

            POWER POLE BLOWN DOWN

0724 PM     HAIL             1 NW WILLIAMSTOWN       41.58N 91.75W 
05/02/2018  M1.00 INCH       JOHNSON            IA   TRAINED SPOTTER 

0748 PM     HAIL             1 S HILLS               41.55N 91.53W 
05/02/2018  M1.00 INCH       JOHNSON            IA   TRAINED SPOTTER 

0748 PM     HEAVY RAIN       1 S HILLS               41.55N 91.53W 
05/02/2018  M1.34 INCH       JOHNSON            IA   TRAINED SPOTTER 

            TORRENTIAL RAIN. WATER IS POOLING ON THE YARD.

0759 PM     TSTM WND GST     HILLS                   41.57N 91.54W 
05/02/2018  E60.00 MPH       JOHNSON            IA   EMERGENCY MNGR  

0800 PM     HAIL             HILLS                   41.57N 91.54W 
05/02/2018  M0.75 INCH       JOHNSON            IA   TRAINED SPOTTER 

0814 PM     HAIL             2 SE IOWA CITY          41.64N 91.51W 
05/02/2018  M0.88 INCH       JOHNSON            IA   TRAINED SPOTTER 

            PENNY TO NICKLE SIZE HAIL

0814 PM     HEAVY RAIN       2 SE IOWA CITY          41.64N 91.51W 
05/02/2018  M1.30 INCH       JOHNSON            IA   TRAINED SPOTTER 

            STREET IS FULL OF WATER.

0819 PM     HAIL             SW KALONA               41.48N 91.71W 
05/02/2018  E0.25 INCH       WASHINGTON         IA   TRAINED SPOTTER 

0820 PM     LIGHTNING        WSW KALONA              41.49N 91.71W 
05/02/2018                   WASHINGTON         IA   TRAINED SPOTTER 

            LIGHTNING STRIKE DAMAGED A HOME IN THE 200 BLOCK OF C 
            AVE.

0823 PM     HEAVY RAIN       2 NNW WILLIAMSTOWN      41.59N 91.75W 
05/02/2018  M1.60 INCH       JOHNSON            IA   TRAINED SPOTTER 

            RAINFALL FROM THE FIRST ROUND OF STORMS

0848 PM     HEAVY RAIN       1 NW WILLIAMSTOWN       41.58N 91.75W 
05/02/2018  M2.30 INCH       JOHNSON            IA   TRAINED SPOTTER 

            RAINFALL IN THE PAST HOUR

0805 AM     HEAVY RAIN       3 E STERLING            41.80N 89.64W
05/03/2018  M2.01 INCH       WHITESIDE          IL   TRAINED SPOTTER



0738 AM     HEAVY RAIN       1 W BETTENDORF          41.56N 90.49W
05/03/2018  M1.92 INCH       SCOTT              IA   TRAINED SPOTTER

            0.21 SINCE MIDNIGHT.

0736 AM     HEAVY RAIN       DEWITT                  41.82N 90.55W
05/03/2018  M1.10 INCH       CLINTON            IA   TRAINED SPOTTER



0735 AM     HEAVY RAIN       2 NNW MUSCATINE         41.44N 91.08W
05/03/2018  M1.34 INCH       MUSCATINE          IA   TRAINED SPOTTER



0713 AM     HAIL             1 SE MORRISON           41.80N 89.96W
05/03/2018  M1.00 INCH       WHITESIDE          IL   PUBLIC



0712 AM     HEAVY RAIN       1 SE MORRISON           41.80N 89.96W
05/03/2018  M2.25 INCH       WHITESIDE          IL   PUBLIC



0634 AM     HEAVY RAIN       COLUMBUS JUNCTION       41.28N 91.37W
05/03/2018  M1.25 INCH       LOUISA             IA   TRAINED SPOTTER



0545 AM     HEAVY RAIN       PARNELL                 41.58N 92.01W
05/03/2018  M1.63 INCH       IOWA               IA   TRAINED SPOTTER

            12 HOUR RAIN TOTAL.

0622 PM     HAIL             4 SE WHITTON            42.18N 90.26W
05/02/2018  E1.25 INCH       CARROLL            IL   LAW ENFORCEMENT

            HAIL DAMAGE TO ROOFS AND CARS. DELAYED
            REPORT.

0535 PM     HAIL             2 S DAKOTA DORNINK AIRP 42.36N 89.57W
05/02/2018  M0.75 INCH       STEPHENSON         IL   TRAINED SPOTTER

            CORRECTS PREVIOUS HAIL REPORT FROM 2 S
            DAKOTA DORNINK AIRPORT. DIME SIZE HAIL.

0520 PM     HAIL             1 W FREEPORT ALBERTUS   42.25N 89.60W
05/02/2018  M1.00 INCH       STEPHENSON         IL   TRAINED SPOTTER

            CORRECTS PREVIOUS HAIL REPORT FROM 1 W
            FREEPORT ALBERTUS. 0.75 INCH.

0450 PM     HAIL             3 NNW GOOSE LAKE        42.01N 90.39W
05/02/2018  E1.00 INCH       CLINTON            IA   TRAINED SPOTTER

            IN COMBINATION WITH SEVERE WIDNS, DESTROYED
            A BI-CARBONATE ROOF ON A DAIRY BARN.

0450 PM     TSTM WND GST     3 S PRESTON             42.01N 90.39W
05/02/2018  E60 MPH          CLINTON            IA   TRAINED SPOTTER

            COMBINATION WITH SEVERE HAIL, DESTROYED A
            BI-CARBONATE ROOF ON A DAIRY BARN.

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: 5/2/18 19z	Figure 6: DVN Sounding: 5/3/18 00z

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