Severe thunderstorm activity in recent days has rendered considerable impacts from the Northern Plains through the Lower Great Lakes and Southeast. In particular, a significant derecho affected areas from Iowa through the Mississippi Valley and Lower Great Lakes on August 10, with concentrated reports of damaging wind gusts in excess of 75 mph. The storms produced downed trees ... Continue Reading »
Severe Thunderstorm
Escalating Derecho Threat – Midwest
An escalating threat for severe thunderstorms is affecting areas of the Midwest this afternoon. The U.S. Storm Prediction Center (SPC) has flagged areas under threat, including a rare moderate risk area from Iowa to the Michigan/Indiana line. Damaging straight-line wind gusts are the primary threat expected by the SPC. In particular, concentrated significant wind gusts in ... Continue Reading »
Weather Sentinel: 2020’s Transition to Summer Wind
Despite an extremely below average May in terms of severe weather activity, recent events, particularly a number of which were wind-driven, have seen an uptick during the first third of June. Three separate derechos were observed in just the first 10 days of June, in addition to other widespread convective activity: A widespread wind and hail event brought damaging hail up ... Continue Reading »
Weather Sentinel: SCS Moderate Risk – Ohio Valley, Central Great Lakes & St. Lawrence Valley
A threat for severe thunderstorms today will affect areas from the Ohio Valley to the Central Great Lakes and Saint Lawrence Valley, including Southern Ontario Canada. The U.S. Storm Prediction Center (SPC) has flagged areas under threat today, with a rare moderate risk area for portions of the Lower Great Lakes. ... Continue Reading »
Weather Sentinel – Damaging Severe Hail/Wind Risk Southern Plains
North Texas, Oklahoma and the southern Mississippi River Valley are increasingly at risk for a severe outbreak through tonight with severe winds and hail the most damaging perils. Expansion of the area of moderate risk and significantly severe wind and hail threats now include the Dallas Ft. Worth Metroplex as well as Oklahoma City and Tulsa, OK. ... Continue Reading »
CAT-i Report: Severe Thunderstorm Activity – U.S. Southeast
Weekend severe thunderstorm activity has affected areas from the Southern Plains to the Atlantic Coast, with especially severe activity reported Sunday, April 12. In particular, several long-track, destructive tornadoes were reported including a confirmed EF-3 crossing portions of Monroe, Louisiana, another EF-3 near Clemson, South Carolina and two significant tornadoes ... Continue Reading »
U.S. Severe Thunderstorm Outbreak Expected – Moderate Risk
A probable severe thunderstorm outbreak will affect portions of the Southern Plains and Southeast over the coming weekend, to include possible long-track, destructive tornadoes, significant hail and damaging straight-line winds. ... Continue Reading »
CAT-i Bulletin: Tennessee Tornadoes
In the early hours of March 3, 2020, severe thunderstorms spawned multiple tornadoes in Middle Tennessee, including an EF-3 tornado affecting parts of Nashville and a stronger EF-4 tornado in Putnam County. Media reports indicate at least 24 fatalities statewide. Extensive damage to property and infrastructure has been reported in affected areas, with at least 50 homes ... Continue Reading »
CAT-i Report: Southern Australia Hailstorms
Severe thunderstorm activity affected large parts of Victoria, Canberra, Sydney and South-East Queensland from January 19-21. The storms produced large hail, damaging winds and flash flooding in many areas across these states. According to the Australian Bureau of Meteorology (BOM), there were ground reports of hail of up to 5 cm (2.5 inches) in diameter across Canberra, ... Continue Reading »
CAT-i Bulletin: Recent Tornado Activity – Southern Plains
A severe thunderstorm outbreak affected portions of the Southern Plains and Central Mississippi Valley from the evening of October 20th through the morning of October 21st. The outbreak produced several tornadoes including an EF-3 affecting the Dallas, Texas area as well as another EF-1 crossing parts of Memphis, Tennessee. Clustered reports of damaging straight-line winds and ... Continue Reading »
