Hillsboro/Salem Tornado Damage Survey & Event Summary May 10th, 2017

Overview

Severe thunderstorms developed along a warm front during the evening of Wednesday, May 10, 2017, bringing large hail, strong winds, heavy downpours, and an EF-0 tornado west of Salem, IA (north of Hillsboro) just before 3 pm. No damage was reported and no one was injured.

Tornado
Radar
Storm Reports
Rainfall
Environment

Tornadoes:

Tornado - Hillsboro / Salem, IA
Van Buren County into Henry County

Date	05/10/2017
Time (Local)	246 - 252 pm CDT
EF Rating	EF-0
Est. Peak Winds	70 mph
Path Length	2.84 miles
Max Width	50 yards
Injuries/Deaths	0 / 0
Summary: A tornado touched down in a field and was on the ground for about 6 minutes. Flying dirt was observed but no damage was reported. The path was through mainly inaccessible forest. Based on radar and eye-witness reports the tornado lasted just over 6 minutes. The survey found a few downed trees and branches on the only roads in the area. As the tornado occluded and moved north, damage to an oat field was found. This damage was consistent with mesocyclonic wind.

Track Map


Hwy 16 looking north toward Salem, IA Photo: Shane Newton	Salem, IA Photo: Jesse Risley	Salem, IA Photo: Jesse Risley

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:

Interactive Radar Loop - Courtesy IEM Mesonet	Local AWIPS Radar Loop

Storm Reports

Interactive Storm Report Map	SPC Storm Reports


PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE QUAD CITIES IA IL 702 PM CDT WED MAY 10 2017 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 1106 AM HEAVY RAIN 3 S LADORA 41.71N 92.18W 05/10/2017 M1.05 INCH IOWA IA TRAINED SPOTTER RAIN FELL IN 90 MINUTES. 0227 PM HAIL 2 SSW BIRMINGHAM 40.86N 91.96W 05/10/2017 M1.00 INCH VAN BUREN IA TRAINED SPOTTER DELAYED REPORT, TIME ESTIMATED 0230 PM HAIL 1 SW BIRMINGHAM 40.87N 91.96W 05/10/2017 E1.00 INCH VAN BUREN IA TRAINED SPOTTER COUPLE STONES UP TO QUARTERS. 0245 PM FUNNEL CLOUD 1 NW HILLSBORO 40.85N 91.73W 05/10/2017 VAN BUREN IA TRAINED SPOTTER BRIEF FUNNEL 15 TO 30 SECONDS LONG. 0254 PM TORNADO 1 N SALEM 40.87N 91.62W 05/10/2017 HENRY IA TRAINED SPOTTER WAS BRIEFLY ON THE GROUND AS A ROPE, TORNADO HAS LIFTED. 0259 PM TORNADO W SALEM 40.85N 91.62W 05/10/2017 HENRY IA TRAINED SPOTTER TOUCHDOWN FOR ABOUT 3 MINUTES WEST OF SALEM 1 TO 2 MILES MOVING EAST. LIFTED BEFORE REACHING THE TOWN OF SALEM. 0315 PM HAIL 2 SSW BIRMINGHAM 40.86N 91.96W 05/10/2017 M0.88 INCH VAN BUREN IA TRAINED SPOTTER 0316 PM TSTM WND GST 1 SW BIRMINGHAM 40.87N 91.96W 05/10/2017 E60.00 MPH VAN BUREN IA TRAINED SPOTTER MAX GUSTS TO 60 MPH. 0342 PM HEAVY RAIN 4 W MOUNT PLEASANT 40.97N 91.63W 05/10/2017 M1.30 INCH HENRY IA TRAINED SPOTTER RAINFALL IN THE PAST 40 MINUTES 0358 PM FUNNEL CLOUD S MEDIAPOLIS 41.01N 91.16W 05/10/2017 DES MOINES IA EMERGENCY MNGR MOVING EAST. 0406 PM HAIL ST. PAUL 40.77N 91.52W 05/10/2017 M0.25 INCH LEE IA EMERGENCY MNGR 0408 PM HAIL 1 ESE NEW LONDON 40.92N 91.40W 05/10/2017 M0.25 INCH HENRY IA TRAINED SPOTTER 0413 PM HAIL 3 SSW NEW LONDON 40.89N 91.43W 05/10/2017 M1.00 INCH HENRY IA TRAINED SPOTTER 0433 PM HAIL S BURLINGTON 40.81N 91.12W 05/10/2017 M0.25 INCH DES MOINES IA EMERGENCY MNGR 0502 PM TSTM WND GST MONMOUTH 40.91N 90.64W 05/10/2017 E50.00 MPH WARREN IL PUBLIC TIME ESTIMATED FROM RADAR. 0506 PM HAIL MONMOUTH 40.91N 90.64W 05/10/2017 E0.25 INCH WARREN IL PUBLIC NEAR INTERSECTION OF HWY 67 AND HWY 34...REPORT VIA TWITTER. 0530 PM HEAVY RAIN LOWDEN 41.86N 90.92W 05/10/2017 M1.52 INCH CEDAR IA CO-OP OBSERVER RAINFALL IN THE PAST 8 HOURS. 0544 PM HEAVY RAIN 4 W MOUNT PLEASANT 40.97N 91.63W 05/10/2017 M2.09 INCH HENRY IA TRAINED SPOTTER TOTAL THROUGH 545 PM 0545 PM HEAVY RAIN 5 E CANTRIL 40.64N 91.98W 05/10/2017 M1.00 INCH VAN BUREN IA TRAINED SPOTTER RAINFALL TODAY. 0545 PM TSTM WND DMG MACOMB 40.47N 90.68W 05/10/2017 MCDONOUGH IL TRAINED SPOTTER TREE DOWN ON POWER POLE ON MAPLE AVE NEAR THE HIGH SCHOOL, TIME ESIMATED ON RADAR. 0546 PM TSTM WND DMG 5 WSW MACOMB 40.44N 90.77W 05/10/2017 MCDONOUGH IL TRAINED SPOTTER TREE BLOWN DOWN, ONTO HOME ROOF. 0551 PM HEAVY RAIN 3 SSW CENTER JUNCTION 42.08N 91.11W 05/10/2017 M1.30 INCH JONES IA TRAINED SPOTTER RAINFALL SINCE 915AM 0620 PM HEAVY RAIN 4 N MARENGO 41.85N 92.07W 05/10/2017 M1.25 INCH IOWA IA TRAINED SPOTTER 0620 PM HEAVY RAIN 1 W BETTENDORF 41.56N 90.49W 05/10/2017 M1.76 INCH SCOTT IA TRAINED SPOTTER RAINFALL SO FAR TODAY...0.77 INCHES SINCE 430 PM

Rain Reports


Figure 1: Local 24-hr Rainfall	Figure 2: Multiple-Radar/ Multiple-Sensor Estimated Rainfall Ending 7 pm 05/11/17	Figure 3: Regional 24-hr Rainfall

Public Information Statement National Weather Service Quad Cities IA IL 1156 AM CDT Thu May 11 2017 ...Rainfall Reports... Location Amount Lat/Lon Morrison 2.30 in 41.81N/89.97W Davenport Nws 2.02 in 41.61N/90.58W Davenport Arpt 2.01 in 41.61N/90.59W 2 NNW Davenport 1.84 in 41.58N/90.62W 3 W Richmond 1.78 in 41.46N/91.76W Le Claire L/d 14 1.78 in 41.58N/90.42W 1 W Port Byron 1.77 in 41.62N/90.35W Eldridge 1.77 in 41.64N/90.59W 1 WSW Spring Grove 1.73 in 40.73N/91.19W Lowden 1.52 in 41.87N/90.93W Augusta 1.48 in 40.77N/91.28W 2 SSW Malvern 1.45 in 41.82N/89.90W 3 E Salem 1.44 in 40.84N/91.56W 1 WNW Pilot Grove 1.39 in 40.78N/91.56W 3 SSW Nichols 1.37 in 41.44N/91.33W Sterling 1.35 in 41.79N/89.67W 2 ENE Calamus 1.34 in 41.84N/90.73W Rock Island L/d 15 1.34 in 41.52N/90.57W Burlington Arpt 1.33 in 40.78N/91.13W Unionville 1.33 in 41.82N/89.98W Aledo 1.31 in 41.22N/90.75W 2 SSE Davenport 1.31 in 41.53N/90.59W 1 SE Davenport 1.29 in 41.54N/90.59W 1 ENE Oak Grove 1.27 in 41.42N/90.55W 1 SW Coleta 1.27 in 41.89N/89.81W Sigourney 1.24 in 41.33N/92.20W Alexis 1.23 in 41.05N/90.57W 3 W Pleasant Grove 1.23 in 40.97N/91.34W Palo 4.4 SSW 1.21 in 42.00N/91.81W Washington 1.19 in 41.28N/91.68W Rock Falls 1.18 in 41.78N/89.68W 1 WNW Eldridge 1.17 in 41.65N/90.59W 2 N Muscatine 1.17 in 41.47N/91.04W Ely 1.16 in 41.87N/91.58W Riverdale 1.15 in 41.54N/90.45W 1 NE Marion 1.13 in 42.05N/91.57W Salem 1 S 1.13 in 40.83N/91.62W Park View 1.12 in 41.69N/90.54W Keosauqua Airport 1.12 in 40.74N/91.96W Moline 1.12 in 41.50N/90.49W Quad City Intl Arpt 1.12 in 41.45N/90.51W Camanche 1.2 W 1.11 in 41.80N/90.28W 1 WSW New London 1.11 in 40.91N/91.43W University Heights 1.11 in 41.65N/91.56W Marengo 2.6 SSW 1.10 in 41.76N/92.08W West Amana 1.10 in 41.81N/91.97W 3 ENE Oakdale 1.10 in 41.72N/91.54W 1 W Sigourney 1.10 in 41.34N/92.23W 1 WSW Davenport 1.10 in 41.54N/90.63W 2 SSE Atkins 1.08 in 41.96N/91.84W Shannon 1.06 in 42.15N/89.74W Aledo 1.06 in 41.20N/90.74W 3 SSW Anamosa 1.05 in 42.08N/91.30W 2 SSE Osborn 1.05 in 41.49N/90.25W 4 N Haskins 1.05 in 41.40N/91.54W 2 NNE New Windsor 1.05 in 41.23N/90.44W Roseville 1.05 in 40.73N/90.67W Monmouth 1.05 in 40.92N/90.65W Moline 1.04 in 41.49N/90.48W Fulton 1.03 in 42.15N/90.68W North English 1.03 in 41.52N/92.07W La Harpe 1.02 in 40.58N/90.97W Mount Pleasant Arpt 1.02 in 40.95N/91.51W Augusta 1.01 in 40.23N/90.93W Belle Plaine 1.00 in 41.90N/92.27W 2 ESE Scioto Mills 1.00 in 42.33N/89.63W 1 NW Marion 0.99 in 42.06N/91.61W 2 NE Cedar Rapids 0.98 in 42.00N/91.63W Fairfield 0.97 in 41.03N/91.95W Geneseo 0.97 in 41.45N/90.17W 1 W Moline 0.97 in 41.49N/90.51W Iowa City Arpt 0.97 in 41.64N/91.55W Keosauqua 0.97 in 40.73N/91.97W 1 S Princeton 0.96 in 41.36N/89.47W Freeport Arpt 0.94 in 42.25N/89.58W Fort Madison Arpt 0.94 in 40.66N/91.33W De Witt 0.93 in 41.82N/90.57W Robins 0.93 in 42.07N/91.67W 1 SE Princeton 0.93 in 41.37N/89.45W Princeton 0.93 in 41.38N/89.48W 5 SSE Elmoville 0.92 in 42.19N/90.02W Bentley 0.91 in 40.33N/91.12W Aledo 0.91 in 41.21N/90.76W Central City 0.91 in 42.20N/91.53W Swisher 0.91 in 41.85N/91.70W 1 N Muscatine 0.90 in 41.44N/91.07W 4 NW Monmouth 0.89 in 40.93N/90.72W Cedar Rapids Arpt 0.88 in 41.88N/91.71W 2 NE Colusa 0.87 in 40.59N/91.15W Illinois City L/d 16 0.87 in 41.42N/91.02W Mount Carroll 0.86 in 42.09N/89.98W Gladstone L/d 18 0.86 in 40.88N/91.03W 2 WSW Cedar Rapids 0.86 in 41.96N/91.71W 1 NW Geneseo 0.86 in 41.47N/90.18W Fulton 0.86 in 41.85N/90.16W Parnell 0.85 in 41.58N/92.01W 3 NNE Lafayette 0.85 in 42.20N/91.65W Elizabeth 0.84 in 42.33N/90.25W Farmington 0.84 in 40.65N/91.72W 1 E Reynolds 0.84 in 41.34N/90.65W Ridott 0.84 in 42.30N/89.48W 1 NNE Olin 0.83 in 42.02N/91.13W Woodhull 0.83 in 41.18N/90.32W Keokuk 0.80 in 40.42N/91.40W 2 N Tiskilwa 0.80 in 41.32N/89.50W 1 WNW Freeport 0.80 in 42.31N/89.66W Clinton Arpt 0.78 in 41.83N/90.33W Fairfax 0.77 in 41.92N/91.78W Memphis 0.77 in 40.46N/92.17W 1 E Oasis 0.77 in 41.70N/91.35W Bellevue L/d 12 0.76 in 42.27N/90.42W 2 SW Hiawatha 0.76 in 42.01N/91.71W 1 SSE Ophiem 0.76 in 41.23N/90.37W Kahoka 0.6 S 0.76 in 40.41N/91.72W Monticello 0.74 in 42.25N/91.17W Monticello Arpt 0.74 in 42.22N/91.16W Center Point 0.72 in 42.19N/91.78W Davis 0.72 in 42.43N/89.42W 4 W Maquoketa 0.72 in 42.07N/90.70W Coggon 0.71 in 42.28N/91.53W Williamsburg 0.71 in 41.66N/92.02W Memphis 0.71 in 40.46N/92.17W 2 NW Fulton 0.70 in 41.89N/90.19W Fort Madison 0.70 in 40.62N/91.33W Iowa City 0.70 in 41.65N/91.53W 1 ENE Marion 0.69 in 42.05N/91.57W Nauvoo 0.69 in 40.54N/91.38W 3 E Iowa City 0.68 in 41.65N/91.48W Muscatine Arpt 0.68 in 41.37N/91.15W Cedar Rvr Near Palo 0.68 in 42.07N/91.78W Cascade 0.67 in 42.30N/91.02W Coralville 0.67 in 41.68N/91.60W Keokuk Arpt 0.67 in 40.46N/91.43W Prairie City 0.67 in 40.59N/90.46W Donnellson 0.66 in 40.63N/91.57W Fulton L/d 13 0.66 in 41.92N/90.15W Raritan 0.65 in 40.70N/90.83W 4 NNW Hitt 0.65 in 42.06N/89.76W 3 SE Lanark 0.65 in 42.06N/89.80W 2 WSW Chadwick 0.65 in 42.00N/89.94W 1 W Urbana 0.63 in 42.22N/91.91W Carthage 0.8 E 0.63 in 40.41N/91.12W Vinton 0.63 in 42.17N/92.00W 1 E Hiawatha 0.61 in 42.05N/91.65W 2 NNW Mount Auburn 0.61 in 42.29N/92.11W Macomb 0.61 in 40.47N/90.69W Keokuk L/d 19 0.60 in 40.40N/91.37W Iowa Rvr At Columbus Jct 0.59 in 41.28N/91.35W 2 ENE Argyle Lake State 0.59 in 40.46N/90.75W 3 ENE Bentley 0.58 in 40.36N/91.06W 2 NW Delmar 0.58 in 42.02N/90.64W Stronghurst 0.55 in 40.74N/90.91W Quasqueton 0.4 WSW 0.55 in 42.39N/91.76W Macomb 0.54 in 40.47N/90.67W Milledgeville 0.52 in 41.97N/89.78W 3 NNW Gladwin 0.52 in 41.42N/91.47W 3 NNW Ely 0.51 in 41.93N/91.62W 1 E Kewanee 0.50 in 41.25N/89.90W Manchester 0.49 in 42.47N/91.45W Macomb Arpt 0.48 in 40.52N/90.65W Galena 0.46 in 42.42N/90.43W Galena Territory 0.45 in 42.41N/90.35W Dubuque Arpt 0.45 in 42.40N/90.71W Dubuque #3 0.41 in 42.40N/90.73W Independence 0.40 in 42.47N/91.88W Stanley 0.40 in 42.64N/91.81W 1 N Independence 0.39 in 42.48N/91.89W New Boston L/d 17 0.39 in 41.18N/91.05W Observations are collected from a variety of sources with varying equipment and exposures. We thank all volunteer weather observers for their dedication. Not all data listed are considered official.

Environment


Figure 5: DVN 5/10 12z Sounding	Figure 5: DVN 5/10 00z Sounding

SPC Outlooks


Figure 1: SPC 1630z Day 1 Outlook	Figure 2: SPC 1630z Day 1 Tornado Outlook	Figure 3: SPC 1630z Day 1 Wind Outlook	Figure 4: SPC 1630z Day 1 Hail Outlook

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