![]() ![]() The 80km grid-point value corresponds to the number of events withinĢ5 miles of a point. The resulting grid numbers are then divided by 10 and smoothed to arrive at the annual average number ofĭays with a report of severe weather based on official NWS Storm Data records. These maps were created by gridding the total number of daily severe weather reports (Midnight to 11:59pm CDT) over the 10-year period fromĢ003 through 2012 on a 80km grid. Severe Weather Reports Per Year (2003-2012) Midwest Derecho Event(s) of June 30, 2014ĭe-trended U.S. Histogram of tornado counts through April 21Ī look back at April 3-4, '74 with high resolution modelĪnalysis of partial season watch counts (pdf) Watch counts by month/type (through early September) in 2014Ģ014 Tornadoes and State Departures through October March 2013, 2014, 2015 Radar-based hail mapsĪll storm reports across the continental U.S. Probability of a Tornado Watch during Week of ChristmasĪpril 2013, 2014, 2015 Radar-based hail maps Lastest information on MEI: //Lastest on ENSO from CPC: //Page Content Archive The total watch day summary maps for December, January, February, April, and May also reveal how ENSO phase can influence severe weather potential during the cool season and early warm season. The bottom map shows the difference in total watch days between the strongest El Niño months and the strongest La Niña months. The middle map shows the total watch days for the ten Januarys with most pronounced La Niña conditions during December-January. The top map shows the total watch days in the ten Januarys corresponding to the most pronounced El Niño conditions during December-January. (*Divide grid cell numbers by 10 to arrive at monthly mean watch days in each phase). The years with the 10 warmest (El Niño) and 10 coldest (La Niña) phases for the December to January time frame, back to 1970, were used to select the total* January watch days within each phase. ![]() The ENSO phase strength was ranked using the Multivariate ENSO Index, or MEI. With strong El Niño (ENSO warm phase) conditions continuing into the winter months, here's an analysis of how those conditions may influence the number of watch days in December. This page has charts of the latest preliminary severe storm reports, annual summaries, and links to comma-separated-value (csv) data files from the SPC severe weather database back to 1950.Ī map of all tornado (red), hail (green), and thunderstorm wind gust (blue) reports from NWS offices in 2022.Ĭool Season Watch Days and El Niño Southern Oscillation (ENSO) Phase SPC AWIPS Products | Data | Tropical Cyclone Tornadoes | SVR GIS Watch Frequency Maps | 20y Annual Average Watches by County | 30-year Severe Climatology Monthly Tornadoes Since 1950 | Bi-monthly Tornadoes by ENSO Phase Strength Annual Tornado Maps | 2023 Preliminary Reports to Date It was rated an EF-0 and had a maximum wind speed of about 85 mph.Severe Weather Maps, Graphics, and Data Page Its path was about five miles long, with an estimated maximum width of 150 yards. The other southwestern Illinois tornado was south of Valmeyer in Monroe County.Its maximum width was 100 yards, with an estimated peak wind of 100 mph. Clair County line outside of Hecker at 6:59 p.m. southwest of Maeystown and continued 19.5 miles northeast, ending just over the St. In Monroe County, one tornado started at 6:34 p.m.It’s path was 1.12 miles with a maximum width of 90 yards. The Swansea area tornado was an EF-0, with peak winds at 85 mph.Its path was 3.04 miles, with a width up to 200 yards. The Belleville area tornado was an EF-1, with estimated peak winds at 98 miles per hour.Here’s what the National Weather Service said about Illinois tornadoes in Sunday Twitter posts: Updated 742PM -Preliminary results: 7 tornadoes around the area, highest rating EF1. ![]()
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