|Upper Midwest and Western Great Lakes Summer Wetness
||June - August
||A persistent storm track across the northern tier of the U.S. brought the Upper Midwest and Western Great Lakes a very wet summer. Wisconsin had its wettest summer (JJA) on record. Widespread flooding was prevalent in the region.
||NCDC U.S. June, July and August Reports
|Record Flip in Seasonal Temperature Anomalies for Southeast
||Dec-Feb vs Jun-Aug
||The Southeast U.S. began the year with one of its ten coldest winters on record. Summer 2010 was the warmest on record for the region. The difference in Summer (JJA) and Winter (DJF) temperatures is the region's largest since records began in 1895.
||Regional Temps Difference, NCDC Winter Ranks, NCDC Summer Ranks
|Los Angeles All Time Warmth
||Downtown Los Angeles set its all-time high temperature record of 113°F on September 27th. Almost as noteworthy, this temperature record came on the heels of the second coolest summer (JJA) as recorded at LAX.
||NCDC Hazards / NCDC National Report
|New York CIty Tornadoes
||Two tornadoes touched down in New York City on September 16 (one in Brooklyn, one in Queens), bringing the total number of tornadoes in NYC in 2010 to three. Prior to 2010, only seven tornadoes had been recorded in the city since 1950.
||Freezing temperatures plunged into the heart of Florida bringing 32°F readings as far south as St. Petersburg/Vero Beach, FL. Iguanas fell catatonic from trees in South Florida.
|Western U.S. Severe Weather
||A strong low pressure system generated heavy rains and severe thunderstorms, including tornadoes, in parts of Arizona, Nevada and California. Arizona had its all-time greatest one-day tornado outbreak on October 6, with eight confirmed tornadoes.
|Record Low Barometric Pressure
||Strong low-pressure systems brought all-time low barometric pressure readings to several locations in the western U.S. including Eureka, CA and Reno, NV. Widespread wind damage was reported.
|Alaskan Ice Storm
||A strong low pressure system and an associated fetch of warm, moist air from the south combined with below-freezing air at the surface to cause a widespread freezing rain event. This event affected an area of Alaska as large as Texas, Oklahoma, and New Mexico combined. Nearly all of Alaska's road system was affected.
|EF-4 Tornado, Milbury, OH
||Severe weather occurred across several states in the Great Lakes and Ohio Valley during June. One of the strongest tornadoes of the season occurred in Milbury, OH causing widespread damage and several fatalities.
|Fourmile Canyon Fire
||In a down year for fires nationally, this large wildfire in Boulder, Colorado forced the evacuations of thousands of people. After a week of uncontrolled burn in and around populated areas, this became the costliest fire in Colorado history.
||NCDC Hazards, Wildfire Report
|Arkansas Flash Flood
||More than 7" of rain fell in just a few hours, resulting in flash flooding in the Albert Pike Recreation Area, where 200 to 300 campers were confronted by several feet of water. The Little Missouri River in Pike County observed a 20' rise in 3 1/2 hours; 20 deaths were attributed to the flash flood, later estimated to be a 500-year event.
||NCDC Hazards, Little Rock NWS
|Tropical Storm Hermine Flooding
||The remnants of Tropical Storm Hermine drenched Texas, Oklahoma, and northwest Arkansas. Rainfall amounts upward of 16" in Texas and 14" in Oklahoma led to widespread flash flooding and property damage. Several deaths were attributed to the event.
||NCDC Hazards,Corpus Christi NWS, Tulsa NWS
||A slow-moving storm caused record breaking snowfalls of approximately 15" in Central and North Texas. Dallas/Ft Worth (DFW) set records for most snowfall in a calendar day and in 24 hours. The event contributed to DFW's second snowiest winter on record.
||NCDC Hazards,Lake Charles NWS
|Northern Plains Tornado Outbreak
||In less than a 4 hour period, 39 tornadoes were confirmed, 3 of which were EF4. In all, there were 74 tornadoes.
||NCDC Hazards, Chanhassen NWS, Grand Forks NWS
||A series of "Pineapple Express" storms inundated California with rain, snow and high winds. Several locations broke daily precipitation records on both the 19th and the 20th. Downtown Los Angeles recorded a total of 6.72 inches of rain, which is equivalent to more than one-third of its annual average precipitation.
||A strong winter storm brought record breaking snowfall along the U.S. East Coast from December 25th through 27th. Snow accumulation in excess of 6 inches was reported from Georgia to Maine, and many locations in the Southeast had their first white Christmas on record. Based on NESIS, the storm ranked as a Category 3 (4.92). Boston and New York City both experienced top ten storm snow accumulations, with 18.2 inches and 20.0 inches, respectively. The 20.1 inches which fell at the Atlantic City International Airport was a single snowstorm record.
||NCDC Hazards, NESIS
** These events occurred after the top ten voting, but may have warranted top ten placement.