Snow amounts of 6 inches or more in 12 hours, or 8 inches or more in 24 hours, or heavy sleet accumulations of one half inch or greater are expected. These may or may not be accompanied by wind or other phenomena. Wind speeds of 35 mph or greater, considerable falling or blowing snow, and visibilities frequently below a quarter mile are expected to prevail for three hours or more. An additional tag of "Expected Rainfall Rate" will be included when warning forecasters have enough confidence to include expected rainfall rates with the storm. The flash flood tag will be either "Radar Indicated", "Gauge Indicated", or "Observed", with the last of those three giving confirmation that flash flooding has been reported with the storm. The damage threat tag is for progressively worse expected damage and are "Considerable" and "Catastrophic".
These warnings are impact-based meaning they include a flash flood tag and at times a damage threat tag at the bottom. A warning may also be issued if a dam break has occurred. Long duration areal or river flooding is occurring or is imminent, which may result from excessive rainfall, rapid snow melt, ice jams on rivers or other similar causes.Įxcessive rainfall producing thunderstorms have developed, leading to short duration flash flooding. An additional tag of "Tornado Possible" will be included when warning forecasters suspect a tornado is possible in addition to the damaging winds and/or hail. The wind and/or hail tag is either "Radar Indicated" or "Observed", with the latter giving confirmation that severe weather has been reported with the storm. The damage threat tag is for progressively worse expected damage and are "Considerable" and "Destructive". These warnings are impact-based meaning they include wind and/or hail tags and at times a damage threat tag at the bottom. The tornado tag is either "Radar Indicated" or "Observed", with the latter giving confirmation a tornado has been reported with the storm. The tornado damage threat tag is for progressively worse expected damage and are "Considerable" and "Catastrophic".Ī severe thunderstorm or a line of severe thunderstorms capable of producing hail greater than one inch in diameter and/or 50 knot (58 mph) wind speeds. These warnings are impact-based meaning they include a tornado tag and a tornado damage threat tag at the bottom of the warning.
#CHICAGO WEATHER TORNADO WARNING DOWNLOAD#
Residents can stay tuned to the NBC 5 Storm Team during our afternoon newscasts, and can also download the NBC Chicago app, where the latest forecasts and live radar services can be located.A severe thunderstorm has radar indications of intense low level rotation in the presence of atmospheric conditions conducive to tornado development, and/or is producing a tornado based on reports. A hot and humid air mass will remain in place for several hours before a cold front finally sweeps it away later this evening, but that unstable air could cause additional showers and thunderstorms to fire in the area. While severe thunderstorm watches have been canceled for most of the area, the National Weather Service says that additional storms could still potentially occur, especially in areas to the south of Interstate 80. The storms also caused travel delays at both Chicago airports, and also impacted service on several Metra rail lines, according to officials. The strong winds caused extensive power outages, with more than 25,000 ComEd customers impacted during the height of the storm on Monday. Evanston, IL Police August 29, 2022Īt Chicago’s O’Hare International Airport, a wind gust of 58 miles per hour was recorded during the height of the storms, and in Hoffman Estates, a private weather station clocked a wind gust of 60 miles per hour.
This could cause traffic disruptions, especially in the Central Street area where the damage & outages are most significant. The recent storms have caused power outages & downed trees in #Evanston.
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