Overview
A broken line of supercell thunderstorms developed near the Mississippi River and rapidly moved east ahead of a strong cold front during the afternoon of April 3, 2018. One of the supercells produced a strong EF-2 tornado southeast of Vandalia, IL in Fayette County. The tornado was surveyed by NWS personnel on April 4, 2018. The summary of the event and the damage survey are presented.
Tornadoes:
Tornado - St. James, IL
Track Map |
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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 |
Damage Photos:
Various damage photographs from the NWS damage survey.
Electric Pole Snapped | Cabin Destroyed | Trees Snapped | Outbuilding Damaged |
Radar:
KVWX (Evansville, IN) Radar Data.
0.5 Reflectivity (Top Left), 0.5 Storm Relative Velocity (Top Right), Correlation Coefficient (Bottom Left), and Normal Rotation (Bottom Right)
Radar Imagery at 4:20 PM CDT | Radar Imagery at 4:26 PM CDT | Radar Imagery at 4:33 PM CDT | Radar Imagery at 4:37 PM CDT |
Storm Reports
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0244 PM HAIL WEBSTER GROVES 38.59N 90.36W
04/03/2018 E0.50 INCH ST. LOUIS MO TRAINED SPOTTER
0247 PM HAIL VIBURNUM 37.72N 91.13W
04/03/2018 E1.00 INCH IRON MO PUBLIC
DELAYED REPORT FROM SOCIAL MEDIA. TIME
ESTIMATED FROM RADAR.
0249 PM HAIL VIBURNUM 37.72N 91.13W
04/03/2018 E0.50 INCH IRON MO TRAINED SPOTTER
0250 PM HAIL ARNOLD 38.43N 90.37W
04/03/2018 E0.25 INCH JEFFERSON MO PUBLIC
0254 PM HAIL OAKVILLE 38.45N 90.32W
04/03/2018 E0.25 INCH ST. LOUIS MO TRAINED SPOTTER
0254 PM HAIL 2 WSW BIXBY 37.66N 91.11W
04/03/2018 E1.00 INCH IRON MO PUBLIC
QUARTER-SIZE HAIL IN BIXBY.
0258 PM HAIL ROXANA 38.84N 90.05W
04/03/2018 E0.75 INCH MADISON IL TRAINED SPOTTER
0300 PM HAIL COLUMBIA 38.46N 90.23W
04/03/2018 E0.75 INCH MONROE IL TRAINED SPOTTER
0307 PM HAIL BONNE TERRE 37.92N 90.55W
04/03/2018 E1.25 INCH ST. FRANCOIS MO PUBLIC
CORRECTS PREVIOUS HAIL REPORT FROM BONNE
TERRE. HAIL LARGER THAN QUARTERS. PHOTO
POSTED TO SOCIAL MEDIA. TIME ESTIMATED FROM
RADAR.
0314 PM HAIL 9 SSW BELGRADE 37.67N 90.91W
04/03/2018 M1.00 INCH IRON MO PUBLIC
DELAYED REPORT ON TWITTER. CENTRAL IRON
COUNTY SOUTH OF COUNCIL BLUFF LAKE. LOCATION
0321 PM HAIL CENTERVILLE 37.44N 90.96W
04/03/2018 E1.50 INCH REYNOLDS MO PUBLIC
DELAYED REPORT WITH PHOTO ON SOCIAL MEDIA.
TIME ESTIMATED FROM RADAR.
0345 PM HAIL STE. GENEVIEVE 37.98N 90.05W
04/03/2018 E0.25 INCH STE. GENEVIEVE MO TRAINED SPOTTER
0348 PM HAIL FARMINGTON 37.78N 90.43W
04/03/2018 E0.50 INCH ST. FRANCOIS MO PUBLIC
FACEBOOK REPORT. TIME ESTIMATED FROM RADAR.
0350 PM HAIL STE. GENEVIEVE 37.98N 90.05W
04/03/2018 E0.50 INCH STE. GENEVIEVE MO PUBLIC
SLIGHTLY LARGER THAN MARBLE-SIZED HAIL.
0400 PM HAIL DES ARC 37.28N 90.64W
04/03/2018 E1.00 INCH IRON MO PUBLIC
QUARTER-SIZE HAIL AT HEIFER MEL`S DINER.
0401 PM HAIL 2 S ELLIS GROVE 37.98N 89.91W
04/03/2018 E0.50 INCH RANDOLPH IL TRAINED SPOTTER
0404 PM HAIL FREDERICKTOWN 37.56N 90.30W
04/03/2018 E0.25 INCH MADISON MO TRAINED SPOTTER
0420 PM TORNADO 3 NW SAINT PAUL 38.89N 89.00W
04/03/2018 FAYETTE IL NWS STORM SURVEY
BEGINNING POINT OF EF2 TORNADO.
0427 PM TORNADO SAINT JAMES 38.96N 88.85W
04/03/2018 FAYETTE IL EMERGENCY MNGR
PROBABLE TORNADO TOUCHDOWN. 3 HOMES HEAVILY
DAMAGED.
0431 PM HAIL WATERLOO 38.33N 90.16W
04/03/2018 E0.25 INCH MONROE IL TRAINED SPOTTER
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