Severe Thunderstorm Summary August 10th, 2017

Overview

Showers and thunderstorms developed ahead of a cold front that tracked across eastern Iowa and northwest Illinois Thursday afternoon and evening. A few of these storms became severe, and produced ping pong to golf ball sized hail and wind gusts exceeding 60 MPH. Several reports of tree damage and trees down were received in Monticello and Haskins.

Storm Reports

Storm Reports

000
NWUS53 KDVN 110120
LSRDVN

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
820 PM CDT THU AUG 10 2017

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

0202 PM     HAIL             MONTICELLO              42.24N 91.19W 
08/10/2017  M0.25 INCH       JONES              IA   EMERGENCY MNGR  

            DELAYED REPORT, TIME ESTIMATED BASED ON RADAR

0202 PM     TSTM WND DMG     MONTICELLO              42.24N 91.19W 
08/10/2017                   JONES              IA   EMERGENCY MNGR  

            TREE DOWN IN CENTER OF TOWN, TIME ESTIMATED ON RADAR

0225 PM     HAIL             OLIN                    42.00N 91.14W 
08/10/2017  M1.75 INCH       JONES              IA   LAW ENFORCEMENT 

0353 PM     HAIL             5 NNW HASKINS           41.40N 91.58W 
08/10/2017  E1.00 INCH       WASHINGTON         IA   PUBLIC          

            ALSO WIND GUSTS TO 60 MPH.

0353 PM     TSTM WND GST     5 NNW HASKINS           41.40N 91.58W 
08/10/2017  E60.00 MPH       WASHINGTON         IA   PUBLIC          

            ALSO QUARTER SIZED HAIL.

0400 PM     HAIL             4 NW HASKINS            41.37N 91.59W 
08/10/2017  M1.50 INCH       WASHINGTON         IA   AMATEUR RADIO   

            TIME ESTIMATED BASED ON RADAR

0400 PM     TSTM WND DMG     4 NW HASKINS            41.37N 91.59W 
08/10/2017                   WASHINGTON         IA   AMATEUR RADIO   

            TREES DOWN NEAR THE INTERSECTION OF COUNTY ROAD G36 AND 
            SPRUCE AVE

0420 PM     TSTM WND GST     4 N COTTER              41.35N 91.47W 
08/10/2017  E60.00 MPH       LOUISA             IA   TRAINED SPOTTER 

            ESTIMATED 40 TO 60 MPH WIND GUSTS. SEVERAL SMALL BRANCHES
            BLOWN DOWN. ALSO NICKEL HAIL. CORRECTED TYPO.

0431 PM     HAIL             COLUMBUS JUNCTION       41.28N 91.36W 
08/10/2017  M0.50 INCH       LOUISA             IA   TRAINED SPOTTER 

0432 PM     HAIL             DEWITT                  41.82N 90.55W 
08/10/2017  E0.75 INCH       CLINTON            IA   NWS EMPLOYEE    

0455 PM     HAIL             SW LOW MOOR             41.80N 90.36W 
08/10/2017  M0.88 INCH       CLINTON            IA   TRAINED SPOTTER 

0458 PM     HAIL             N FOLLETTS              41.75N 90.35W 
08/10/2017  M1.00 INCH       CLINTON            IA   LAW ENFORCEMENT 

0500 PM     HAIL             CAMANCHE                41.79N 90.28W 
08/10/2017  E1.50 INCH       CLINTON            IA   PUBLIC          

            RELAYED BY NWS EMPLOYEE. TIME ESTIMATED.

0505 PM     HAIL             CLINTON                 41.84N 90.23W 
08/10/2017  M1.25 INCH       CLINTON            IA   CO-OP OBSERVER  

0509 PM     HAIL             2 ENE CLINTON           41.85N 90.19W 
08/10/2017  M0.25 INCH       CLINTON            IA   TRAINED SPOTTER 

0516 PM     HAIL             2 ESE KEOSAUQUA         40.72N 91.92W 
08/10/2017  M0.75 INCH       VAN BUREN          IA   TRAINED SPOTTER 

0520 PM     HAIL             2 WSW NEWTON CORNERS    41.72N 90.15W 
08/10/2017  M1.00 INCH       WHITESIDE          IL   TRAINED SPOTTER 

0537 PM     HAIL             ESE ERIE                41.66N 90.08W 
08/10/2017  E1.00 INCH       WHITESIDE          IL   TRAINED SPOTTER 

            ALSO WIND GUSTS TO 45 MPH.

0602 PM     TSTM WND DMG     NAUVOO                  40.55N 91.38W 
08/10/2017                   HANCOCK            IL   LAW ENFORCEMENT 

            BRANCHES DOWN ON POWER LINES IN NAUVOO. RELAYED BY 
            SHERIFF OFFICE. TIME ESTIMATED.

0630 PM     TSTM WND GST     1 ESE ANNAWAN           41.39N 89.89W 
08/10/2017  E60.00 MPH       HENRY              IL   TRAINED SPOTTER 

0734 PM     TSTM WND GST     GRANVILLE               41.26N 89.23W 
08/10/2017  M64.00 MPH       PUTNAM             IL   TRAINED SPOTTER 

            RELAYED BY WSPL RADIO/STUDSTILL MEDIA NEWS DIRECTOR 

0734 PM     TSTM WND GST     GRANVILLE               41.26N 89.23W 
08/10/2017  M64.00 MPH       PUTNAM             IL   TRAINED SPOTTER 

            RELAYED BY WSPL RADIO/STUDSTILL MEDIA NEWS DIRECTOR


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