Damage Surveys - July 23, 2016 Event Summary

Overview

Saturday, July 23, was hot and humid with excessive heat over Iowa, Illinois and Missouri, and severe thunderstorms with tornadoes and torrential rain across parts of northeast Iowa and northwest Illinois. Rainfall amounts ranged from a trace at Iowa City, to nearly 3 inches near Independence. Flash flooding was reported in Independence and Monticello while tornadoes were reported near Delhi and Worthington. High temperatures ranged from 93 degrees at Keokuk and Fairfield to 81 degrees at Dubuque while the heat index was around 100.

Additional Information:

NWS Chicago

Tornado Tracks

Tornado
Radar
Storm Reports
Rainfall
Environment

Tornadoes:

Tornado #1 - Near Masonville, IA
Buchanan & Delaware Counties

Date	July 23, 2016
Time (Local)	405 PM CDT - 406 PM CDT
EF Rating	EF-1
Est. Peak Winds	90 mph
Path Length	0.1 miles
Max Width	25 yards
Injuries/Deaths	0 / 0
Summary: A brief tornado struck a barn, ripping out a section of the upper roof structure.

Preliminary Track Map

Tornado #2 - Delhi, IA
Delaware County

Date	July 23, 2016
Time (Local)	418 PM CDT - 419 PM CDT
EF Rating	EF-1
Est. Peak Winds	90 mph
Path Length	0.25 miles
Max Width	10 yards
Injuries/Deaths	0 / 0
Summary: A tornado moved across the southwest portion of Lake Delhi resulting in downed trees along the shoreline.

Preliminary Track Map

Tornado #3 - Worthington, IA
Dubuque County

Date	July 23, 2016
Time (Local)	442 PM CDT - 445 PM CDT
EF Rating	EF-0
Est. Peak Winds	70 mph
Path Length	0.8 mile
Max Width	25 yards
Injuries/Deaths	0 / 0
Summary: A tornado damaged crops and blew off the roofing material of several farm outbuildings.

Preliminary Track Map

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

Radar:

7/24/16 Interactive Radar Loop

Storm Reports

Interactive Map	SPC Storm Reports July 23, 2016

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1009 PM CDT SAT JUL 23 2016

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

0328 PM     TSTM WND GST     1 N INDEPENDENCE        42.49N 91.89W 
07/23/2016  E55.00 MPH       BUCHANAN           IA   TRAINED SPOTTER 

            WIND GUSTS ESTIMATED 45-55 MPH

0330 PM     TSTM WND GST     1 WNW INDEPENDENCE      42.47N 91.91W 
07/23/2016  M65.00 MPH       BUCHANAN           IA   TRAINED SPOTTER 

            VERY HEAVY RAIN AND WINDS TO 65 MPH.

0335 PM     HEAVY RAIN       1 N INDEPENDENCE        42.49N 91.89W 
07/23/2016  U0.00 INCH       BUCHANAN           IA   TRAINED SPOTTER 

            TORRENTIAL RAIN HAS REDUCED VISIBILITY TO A FEW FEET.

0335 PM     TSTM WND DMG     1 N INDEPENDENCE        42.49N 91.89W 
07/23/2016                   BUCHANAN           IA   TRAINED SPOTTER 

            4 INCH DIAMETER BRANCH SNAPPED OFF TREE

0335 PM     TSTM WND GST     1 N INDEPENDENCE        42.49N 91.89W 
07/23/2016  E65.00 MPH       BUCHANAN           IA   TRAINED SPOTTER 

            WIND ESTIMATED 60 TO 65 MPH

0349 PM     TSTM WND GST     1 S HAZLETON            42.60N 91.91W 
07/23/2016  E70.00 MPH       BUCHANAN           IA   EMERGENCY MNGR  

            WIND ESTIMATED 70 TO 80 MPH DOWNED TREES AT CAMPGROUND

0349 PM     TSTM WND DMG     1 S HAZLETON            42.60N 91.91W 
07/23/2016                   BUCHANAN           IA   EMERGENCY MNGR  

            TREES DOWN AT CAMPGROUND. 

0359 PM     HEAVY RAIN       INDEPENDENCE            42.47N 91.89W 
07/23/2016  U0.00 INCH       BUCHANAN           IA   TRAINED SPOTTER 

            WATER OVER THE CURBS IN INDEPENDENCE. SMALL CREEKS AND 
            STREAMS ARE RISING RAPIDLY DUE TO TORRENTIAL RAIN.

0403 PM     HEAVY RAIN       1 E INDEPENDENCE        42.47N 91.88W 
07/23/2016  M2.25 INCH       BUCHANAN           IA   TRAINED SPOTTER 

            STILL RAINING

0403 PM     TSTM WND DMG     1 E INDEPENDENCE        42.47N 91.88W 
07/23/2016                   BUCHANAN           IA   TRAINED SPOTTER 

            NUMEROUS BRANCHES AND TREE LIMBS DOWN ACROSS TOWN.

0410 PM     TSTM WND DMG     MANCHESTER              42.49N 91.46W 
07/23/2016                   DELAWARE           IA   PUBLIC          

            2 ESTIMATED 8 INCH DIAMATER TREES DOWN. REPORT VIA 
            TWITTER. TIME ESTIMATED BY RADAR. 

0419 PM     HEAVY RAIN       JESUP                   42.48N 92.07W 
07/23/2016  M3.60 INCH       BUCHANAN           IA   TRAINED SPOTTER 

            1 HOUR RAINFALL. 

0421 PM     TSTM WND DMG     NW DELHI                42.43N 91.33W 
07/23/2016                   DELAWARE           IA   TRAINED SPOTTER 

            3 LIMBS APPROXIMATELY 6 TO 12 INCHES IN DIAMETER WERE 
            DOWN. 

0424 PM     HEAVY RAIN       WSW QUASQUETON          42.39N 91.76W 
07/23/2016  E1.61 INCH       BUCHANAN           IA   TRAINED SPOTTER 

            1.61 INCHES RAIN BETWEEN 3:45 AND READING AT 4:30.  WINDS
            AND HEAVY RAIN FOR ABOUT 20 MINUTES. LEAVES AND TWIGS 
            DOWN. NO OTHER DAMAGE NOTED. POND FORMED IN FRONT PASTURE
            FROM HEAVY RAIN. FREQUENT LIGHTING.

0424 PM     HEAVY RAIN       1 N INDEPENDENCE        42.49N 91.89W 
07/23/2016  M1.77 INCH       BUCHANAN           IA   COCORAHS        

            RAINFALL IN 30 MINUTES. WATER ON STREETS ON WEST SIDE OF 
            TOWN.

0425 PM     TSTM WND DMG     HOPKINTON               42.34N 91.25W 
07/23/2016                   DELAWARE           IA   TRAINED SPOTTER 

            SEVERAL LARGE TREES AND BRANCHES DOWN. VIA FACEBOOK. 
            REPORT WAS DELAYED AND TIME ESTIMATED USING RADAR. 

0436 PM     FLASH FLOOD      INDEPENDENCE            42.47N 91.89W 
07/23/2016                   BUCHANAN           IA   TRAINED SPOTTER 

            FLASH FLOODING IN INDEPENDENCE GRAVEL ROAD AT HIGH SCHOOL
            COMPLEX IS WASHED OUT. THE PARKING LOT IS UNDER WATER. 

0441 PM     TORNADO          WORTHINGTON             42.40N 91.12W 
07/23/2016                   DUBUQUE            IA   TRAINED SPOTTER 

            SPOTTER REPORTED A TORNADO NEAR WORTHINGTON. 

0448 PM     TORNADO          FARLEY                  42.44N 91.01W 
07/23/2016                   DUBUQUE            IA   LAW ENFORCEMENT 

            LAW ENFORCEMENT REPORTED A TORNADO GOING UP AND DOWN NEAR
            FARLEY. 

0450 PM     TSTM WND GST     MONTICELLO              42.24N 91.19W 
07/23/2016  M50.00 MPH       JONES              IA   EMERGENCY MNGR  

            WINDS AT THE JONES COUNTY FAIRGROUNDS NEAR MONTICELLO 
            ESTIMATED 50 TO 60MPH

0505 PM     HEAVY RAIN       5 WSW HOPKINTON         42.32N 91.34W 
07/23/2016  M1.66 INCH       DELAWARE           IA   COCORAHS        

            1.66 INCHES IN THE PAST 40 MINS

0510 PM     TSTM WND GST     CASCADE                 42.30N 91.01W 
07/23/2016  M40.00 MPH       DUBUQUE            IA   PUBLIC          

            WIND 31 GUSTING TO 40

0515 PM     FLASH FLOOD      1 WNW INDEPENDENCE      42.47N 91.91W 
07/23/2016                   BUCHANAN           IA   TRAINED SPOTTER 

            HEAVY RAIN DETAILS 2.50-2.74 DURATION 40 MINUTES. STORM 
            TOTAL RAINFALL FOR THE FIRST STORM EVENT THIS EVENING. 
            STREAMS ARE OUT OF BANKS IN SPOTS. SOME LOCALIZED FLASH 
            FLOODING CONTINUES IN SPOTS.

0528 PM     TSTM WND DMG     GALENA                  42.42N 90.43W 
07/23/2016                   JO DAVIESS         IL   911 CALL CENTER 

            POWER LINE DOWN

0530 PM     HEAVY RAIN       WYOMING                 42.06N 91.00W 
07/23/2016  M1.50 INCH       JONES              IA   EMERGENCY MNGR  

0530 PM     TSTM WND DMG     WYOMING                 42.06N 91.00W 
07/23/2016                   JONES              IA   EMERGENCY MNGR  

            PARTIAL TREES DOWN - TIME ESTIMATED

0550 PM     FLASH FLOOD      DUBUQUE                 42.50N 90.69W 
07/23/2016                   DUBUQUE            IA   AMATEUR RADIO   

            DOWNTOWN DUBUQUE HAS WATER OVER SEVERAL ROADS INCLUDING 
            CENTRAL AVENUE AND JACKSON STREETS WITH SEVERAL STREETS 
            CLOSED. 

0600 PM     HEAVY RAIN       NE HOPKINTON            42.34N 91.25W 
07/23/2016  M1.74 INCH       DELAWARE           IA   COCORAHS        

            1.74 INCHES IN THE PAST 60 MINS. MINOR FLOODING. MULTIPLE
            TREES AND BRANCHES DOWN IN TOWN

0618 PM     HEAVY RAIN       1 E INDEPENDENCE        42.47N 91.88W 
07/23/2016  M2.75 INCH       BUCHANAN           IA   TRAINED SPOTTER 

0630 PM     FLASH FLOOD      MONTICELLO              42.24N 91.19W 
07/23/2016                   JONES              IA   EMERGENCY MNGR  

            1.5 FEET OF WATER ON TRACK AT FAIRGROUNDS. 

0635 PM     HEAVY RAIN       SSW MAQUOKETA           42.06N 90.67W 
07/23/2016  M1.50 INCH       JACKSON            IA   TRAINED SPOTTER 

            RAINFALL IN PAST 30 MINUTES. RAIN CONTINUES.

0638 PM     TSTM WND GST     S ELWOOD                42.00N 90.73W 
07/23/2016  E40.00 MPH       CLINTON            IA   LAW ENFORCEMENT 

            SOUTH OF LOST NATION/ELWOOD PEA SIZED HAIL, HEAVY RAIN 
            AND GUST WINDS UP TO 40 MPH REPORTED BY DEPUTY.

0646 PM     HEAVY RAIN       NE MAQUOKETA            42.07N 90.67W 
07/23/2016  M2.00 INCH       JACKSON            IA   TRAINED SPOTTER 

            LESS THAN AN HOUR

0720 PM     HEAVY RAIN       DAVIS                   42.42N 89.42W 
07/23/2016  M0.75 INCH       STEPHENSON         IL   COCORAHS        

            THERE IS SOME PONDING OF WATER IN THE YARD

0737 PM     TSTM WND GST     CLINTON MUNICIPAL AIRPO 41.83N 90.33W 
07/23/2016  M44.00 MPH       CLINTON            IA   AWOS            

0935 PM     HEAVY RAIN       4 ENE FREEPORT          42.32N 89.57W 
07/23/2016  M1.00 INCH       STEPHENSON         IL   TRAINED SPOTTER 

            0.85 INCHES OF RAIN FELL IN A 15 TO 20 MINUTE PERIOD AND 
            THEN THE RAIN GRADUALLY TAPERED OFF.

Rain Reports


Figure 1: Local 24-hr Rainfall Ending 9 am 7/24/16	Figure 2: Multiple-Radar/Multiple-Sensor Estimated Rainfall Ending 3 am 07/23/16

Environment



	SPC Event Wrap-up - July 23, 2016


Figure 1: 1130 AM SPC Convective Outlook	Figure 2: 1130 AM SPC Hail Outlook	Figure 3: 1130 AM SPC Wind Outlook	Figure 4: 1130 AM SPC Tornado Outlook


Figure 8: DVN 12z Sounding 7/23/16	Figure 9: DVN 00z Sounding 7/24/16

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