July 18th 2015 – Weak Tornado Near the Wisconsin Border

Dec 21, 2015

Summary: Chase a pair of supercells in a weakening phase, catching what is probably the weakest tornado I will ever see. Stats: Tornadoes: 1 Hail: .25″ Wind: n/a The Forecast: Zonal flow regime with shortwave energy moving through it. Sufficient deep moisture in place in typical summer-like airmass. Moderate speed shear present in southern end […]

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July 13th Northern Illinois Supercell

Dec 19, 2015

Summary: Tracked Classic looking supercell from birth noting dramatic RFD structure but ultimately failed to produce tornado Stats: Tornadoes: 0 Hail: .75″ (Penny) Wind: None The Forecast: Extreme dewpoint values approaching and exceeding 80 leading to extreme CAPE values in northwest flow regime. Outflow boundary from morning MCS would set up across the area and […]

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June 24th Iowa Tornado Warned Storms

Dec 08, 2015

Summary: Intercepted several storms, including a pair of tornado warnings but storms were mostly outflow dominant. Stats: Tornadoes: 0 Hail: .75″ (Penny) Wind: n/a The Forecast: Slow moving frontal boundary/surface low across Central Iowa. Seasonably strong instability values but relatively weak directional and speed shear. Supercells were possible with initial development but storms were expected […]

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June 22nd 2015 Harmon, Coal City Illinois Tornado

Dec 01, 2015

Summary: Tracked monster supercell that tracked across Northern Illinois, producing at least 10 tornadoes along its way. Stats: Tornadoes: 1 Hail: n/a Wind: est 80mph inflow The Forecast: Strong jet streak moving atop stalled frontal boundary, with extreme values of instability in place. Rich, deep gulf moisture with dewpoints in the upper 70s to near […]

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June 20th 2015 Iowa Squall Line – Eddyville Tornado.

Dec 01, 2015

Summary: Tracked intense squall line across southeast Iowa – getting very near QLCS tornado near the town of Eddyville. Stats:¬† Tornadoes: 1 Hail: 1.25″ (half dollar) Wind: est 60-70mph inflow to QLCS tornado The Forecast: High Cape, stalling frontal boundary with jet streak moving in to trigger more storms. Shear profiles largely unidirectional but some […]

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