The spring season's (March-May) nationally averaged temperature was57.1°F, 5.2°F above the 1901-2000 long-term average,surpassing the previous warmest spring (1910) by 2.0°F. Precipitation totals across the country were mixed during May, withthe nation as a whole being drier-than-average. The nationallyaveraged precipitation total of 2.51 inches was 0.36 inch belowaverage. The coastal Southeast received some drought relief whenTropical Storm Beryl brought heavy rains to the region late in themonth. |
This monthly analysis from NOAA's National Climatic Data Center ispart of the suite of climate services NOAA provides government,business and community leaders so they can make informed decisions. U.S. climate highlights -- May Warmer-than-average temperatures occurred across the contiguousU.S. except the Northwest in May.
Twenty-six states had Maytemperatures ranking among their ten warmest. Precipitation patterns across the contiguous U.S. were mixed duringMay. The Eastern Seaboard and Upper Midwest were wetter thanaverage.
North Carolina, South Carolina, Vermont, New Hampshire andMinnesota had May precipitation totals among their ten wettest. Dryconditions prevailed across the Mid-Mississippi River Valley,Southern Plains and the Interior West with Arkansas, Missouri,Kansas, Nevada and Utah having a top ten dry May. Tropical Storm Beryl made landfall near Jacksonville, Fla., on May28, bringing beneficial rainfall to parts of the drought-strickenSoutheast. Beryl occurred on the heels of Tropical Storm Alberto,which occurred offshore the Carolinas, marking the third time onrecord that two tropical cyclones reached tropical storm strengthduring May (prior to the start of June 1 hurricane season) in theNorth Atlantic basin. Ongoing drought, combined with windy conditions, created idealwildfire conditions across the Southwest.
The Whitewater-Baldy Firecomplex in the Gila National Forest of western New Mexico charredover 210,000 acres by the beginning of June. It surpassed 2011'sLas Conchas Fire as largest wildfire on record for the state. According to the U.S. Drought Monitor, as of May 29, 37.4 percentof the contiguous U.S.
experienced drought conditions, a slightdecrease from 38.2 percent at the beginning of May. Droughtconditions improved across the coastal Southeast, the SouthernPlains, Northeast and Upper Midwest while they deteriorated forparts of the Mid-South and Southwest. U.S. climate highlights -- spring (March-May) The nationally averaged temperature of 57.1°F during spring was5.2°F above the long-term average.
With warmest March, thirdwarmest April and second warmest May, spring 2012 marked thelargest temperature departure from average of any season on recordfor the contiguous United States. Spring was drier-than-average for the contiguous U.S. as a whole,with a national precipitation total of 7.47 inches, 0.24 inch belowaverage. Record and near-record warmth dominated the eastern two-thirds ofthe nation during spring.
Thirty-one states were record warm forthe season and 11 additional states had spring temperatures rankingamong their ten warmest. Only Oregon and Washington had springtemperatures near normal. Wetter-than-average conditions prevailed from the West Coastthrough the Northern Plains and into the Upper Midwest. Oregon wasrecord wet and Minnesota and Washington were third wettest. TheIntermountain West, Ohio Valley, and parts of the Mid-Atlantic weredrier than average.
Colorado, Utah, Wyoming, Indiana, and Delawarehad a top ten dry spring. The U.S. Climate Extremes Index (USCEI), an index that tracks thehighest and lowest 10 percent of extremes in temperature,precipitation, drought and tropical cyclones across the contiguousU.S., was a record-large 44 percent during the March-May period,over twice the average value. Extremes in warm daytime temperatures(81 percent) and warm nighttime temperatures (72 percent) coveredlarge areas of the nation, contributing to the record high value.
Year-to-date (January-May) The January-May months totaled the warmest such period on recordfor the contiguous United States, with an average temperature of49.2°F, 5.0°F above the long-term average. Twenty-ninestates, all east of the Rockies, were record warm for thefive-month period and an additional 14 states had temperatures forthe period among their ten warmest. The year's first five months also brought dry conditions to much ofthe East. The Southwest was drier than average whilewetter-than-average conditions persisted for the Pacific Northwest,Upper Midwest and the western Gulf Coast. The nationalprecipitation total for the five-month period was nearly 1.0 inchbelow average.
12-month period (June 2011-May 2012) The June 2011-May 2012 period was the warmest 12-month period ofany 12 months on record for the contiguous United States. Thenationally averaged temperature of 56.0°F was 3.2°F abovethe long-term average, surpassing the previous warmest 12-monthperiod set last month by 0.4°F. The 12-month periodencapsulated the second warmest summer, fourth warmest winter, andthe warmest spring on record. Every state across the contiguousU.S.
had warmer than average temperatures for the period, exceptWashington, which was near normal. Additional information can be found on the following web sites: May U.S. Climate Report: www.ncdc.noaa.gov/sotc/national/2012/5 NOAA Climate Portal: www.climate.gov/.
We are high quality suppliers, our products such as Aluminum Flight Cases Manufacturer , China Aluminum Beauty Cases for oversee buyer. To know more, please visits Aluminum Cosmetic Cases.
Related Articles -
Aluminum Flight Cases Manufacturer, China Aluminum Beauty Cases,