A large squall line formed ahead of a weak cold front. As the storms moved east across Missouri and Illinois, numerous reports of large hail and damaging winds were received, including an EF0 tornado in the city of St. Louis.

Hail in SHELBY, MISSOURI
From 31-MAR-07 13:56:00 to 31-MAR-07 13:56:00 (CST-6)
Location: SHELBINA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in SHELBY, MISSOURI
From 31-MAR-07 14:04:00 to 31-MAR-07 14:04:00 (CST-6)
Location: SHELBINA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A light pole was blown down on West Elm Street.

Hail in LEWIS, MISSOURI
From 31-MAR-07 14:32:00 to 31-MAR-07 14:32:00 (CST-6)
Location: STEFFENVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in LEWIS, MISSOURI
From 31-MAR-07 14:58:00 to 31-MAR-07 14:58:00 (CST-6)
Location: WILLIAMSTOWN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in JEFFERSON, MISSOURI
From 31-MAR-07 16:32:00 to 31-MAR-07 16:32:00 (CST-6)
Location: PEVELY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in CRAWFORD, MISSOURI
From 31-MAR-07 17:25:00 to 31-MAR-07 17:25:00 (CST-6)
Location: CUBA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in AUDRAIN, MISSOURI
From 31-MAR-07 15:25:00 to 31-MAR-07 15:25:00 (CST-6)
Location: ROWENA
Magnitude: 61.00 EG
Reported by: Newspaper

A microburst hit a farm in the far southwestern sections of Audrain County.  It destroyed a pole barn and caused minor damage to a cabin, yet a 100 year old maple tree near the cabin was still standing.  No injuries were reported.

Tornado in ST. LOUIS (C), MISSOURI
From 31-MAR-07 16:50:00 to 31-MAR-07 16:52:00 (CST-6)
Location: ST LOUIS
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado initially touched down south of the intersection of Flora Place and South 39th Street.  Several trees were damaged in this location.  The tornado traveled to the northeast and caused additional large tree limb damage east of the intersection of Shaw Boulevard and South 39th Street.  The tornado lifted and traveled over I-44 and then dropped back down on Blaine Avenue causing partial roof damage to three homes just west of South Grand Blvd.  The tornado briefly lifted again...then came back down at the Saint Louis University Medical Center causing minor roof damage to one building and blew out a number of windows at two parking garages east of South Grand Blvd on the medical campus.  A large lamp post and several large tree limbs were blown down in this location as well.  The tornado lifted again and then touched down one last time damaging a large billboard west of the intersection of I-64 and Jefferson Avenue.  Two people driving on I-64 were injured from the flying debris and were taken to the hospital for minor cuts.  Traffic lights were damaged on Jefferson Avenue south of I-64.

Hail in AUDRAIN, MISSOURI
From 31-MAR-07 15:35:00 to 31-MAR-07 15:35:00 (CST-6)
Location: LADDONIA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement