![]() ![]() In addition, flooding also took place during the month of February in the Central United States. Significant events included rare snowfall in the South, an outbreak of frigid temperatures that affected the United States during the final week of 2017 and early weeks of January, and a series of strong nor'easters that affected the Northeastern United States during the month of March. The 2017–18 North American winter saw weather patterns across North America that were very active, erratic, and protracted, especially near the end of the season, resulting in widespread snow and cold across the continent during the winter. no surface low) do not have enough moisture return for snow water equivalents of 0.35 to 0.A temperature map of the wide-ranging variable conditions in the United States on February 21, 2018 The moisture and its degree of replenishment for "only" a ~9-10 hour event were challenging ones for forecasters, as typically a progressive system with little surface reflection (i.e. The most favorable meteorological elements in place for this storm were 1.) robust upper forcing producing high snowfall rates, 2.) high moisture (especially for the type of weather system), and 3.) ideal thermal and wind profiles for larger snowflakes reaching the surface. The first winter storm of the season for northern Illinois and northwest Indiana was a quick-moving but efficient one. Remington (Jasper).2.3ĭe Motte 1NNW (Jasper).2.0ĭe Motte 1SSW (Jasper).2.0 ![]() (kb9f)Valparaiso 4S (Porter).3.0ĭe Motte 4SW (Jasper).2.5 Porter 1S (Porter).4.1Ĭrown Point 2WSW (Lake).4.0 Portage 3E (Porter).4.2Ĭrown Point (Lake).4.1Ĭrown Point 1N (Lake).4.1 Valparaiso 2WNW (Porter).5.0ĭyer 1WNW (Lake).4.8 Lincolnwood 3E (Cook).1.8Ĭissna Park 1S (Iroquois).1.6 Waukegan 2N (Lake).2.1įairbury (Livingston).2.0 Lincolnwood 2E (Cook).2.6Ĭhicago 6ESE (Cook).2.5 Watseka 6.9WNW (Iroquois).3.3Ĭhatsworth (Livingston).3.0 Pontiac (Livingston).4.0Īshkum 5.6E (Iroquois).3.3 Hebron (McHenry).4.1īurnham-hegewisch 2NNW (Cook).4.1 Momence (Kankakee).4.5īraceville (Grundy).4.4 Seneca 2SSW (La Salle).4.7īonfield 4WSW (Kankakee).4.5 ![]() Lisle Morton Arb (Du Page).5.0ĭwight 4NNW (Grundy).4.9 Mundelein 2WNW (Lake).5.0Īlgonquin 1N (McHenry).5.0 Rockford (Winnebago).5.3īarrington (Lake).5.2 Naperville 2SE (Du Page).5.5Įlgin 1S (Kane).5.5 Oak Lawn 2WNW (Cook).5.5Įlmhurst 1ESE (Du Page).5.5 Wonder Lake 1WNW (McHenry).5.9Ĭoal City 4NNW (Grundy).5.8Ĭountryside 1ENE (Cook).5.8īurr Ridge 2SW (Du Page).5.8Ĭarbon Hill 3.1N (Grundy).5.8 Willow Springs (Cook).6.0Ĭortland (De Kalb).5.9 Oak Lawn (Cook).6.0Ĭhicago Ridge (Cook).6.0 Naperville 1NW (Du Page).6.7Īshton (Lee).6.6 Ottawa 1NW (La Salle).7.0īull Valley 2WNW (McHenry).7.0ĭowners Grove 0.4NNE (Du Page).6.9īuffalo Grove 2N (Lake).6.9Įlk Grove Village 1ESE (Cook).6.8Įlk Grove Village 2WSW (Cook).6.8 La Salle (La Salle).7.3Įarlville 3S (La Salle).7.2 Romeoville (Will).8.1ĭe Kalb (De Kalb).7.6 The following are snow amounts for the previous 24 hoursĪs measured in the morning by NWS Cooperative ObserversĢ4-hour Snowfall Amounts for Monday(12/05/16).Įlburn (Kane).9.0ĭe Kalb (De Kalb).8.5ĭixon 3NNW (Lee).8.5 ![]()
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