Monday, June 20, 2011

Global Temperature Anomalies May 2011

Global temperatures were 10th warmest on record for May 2011.

Data record 1880-2011.

Map (Credit: NOAA)
The globe experienced the 10th warmest May since record keeping began in 1880, as the climate phenomenon La Niña ended its 2011 cycle. The Arctic sea ice extent was the third smallest extent for May on record.

The monthly analysis from NOAA’s National Climatic Data Center is part of the suite of climate services NOAA provides government, business and community leaders so they can make informed decisions.

Global temperature highlights: May

Last month’s combined global land and ocean average surface temperature was the 10th warmest on record for May at 59.50F (15.30 C), which is 0.90 F (0.50 C) above the 20th century average of 58.6 F (14.8 C). The margin of error associated with this temperature is +/- 0.13 F (0.07 C).
Separately, the global land surface temperature was 1.31 F (0.73 C) above the 20th century average of 52.0 F (11.1 C), which was the seventh warmest May on record. The margin of error is +/- 0.25 F (0.14 C).
The global ocean surface temperature was 0.74 F (0.41 C) above the 20th century average of 61.3 F (16.3 C), making it the 11th warmest May on record. The margin of error is +/- 0.07 F (0.04 C). The warmth was most pronounced in most of the central and western Pacific, most of the Atlantic, and much of the mid-latitude southern ocean regions.

Friday, June 10, 2011

U.S. Climate Update May 2011

From NCDC: Climate Highlights - May 2011
•In May 2011 the United States had dramatic shifts in regional temperatures, but overall was slightly cooler and wetter than normal. Spring was marked by record wetness in the Northwest and Ohio Valley while drought conditions intensified across the South.
•The average U.S. temperature in May was 60 degrees F (15.6 degrees C), which is 1.0 degrees F (0.6 degrees C) below the long-term (1901-2000) average. Precipitation during the month was 0.34 inch (8.6 mm) above the long-term average.
•Average May temperatures across the western third of the country were below normal. Washington (tied) and Oregon experienced their sixth coolest May on record with average temperatures more than 3.6 degrees F (2 degrees C) below the 20th century normal. Wyoming and Utah had their seventh and eighth coolest May on record, respectively.
•Precipitation during May was above normal for much of the United States. Only the South and Southeast experienced average precipitation that was below normal. The average precipitation of 4.7 inches (119.4 mm) in the northern High Plains was a May record, 2.19 inches (56.6 mm) above the 20th century average.
•At the state level, average precipitation in every Gulf Coast state was below normal. Georgia had its fifth driest May, while it was sixth driest for Louisiana, eighth driest for both Mississippi and Texas, ninth driest in Florida, and the tenth driest for Alabama.
•A persistent storm track contributed to above normal precipitation for the majority of states across the northern half of the country. Many states were much above normal including: Utah and Wyoming (2nd wettest), Montana (3rd), Vermont (4th), New York (6th tied), and both Ohio and Nebraska (8th tied).
•The overall drought footprint across the contiguous U.S. remained above average, about the same as a month ago, at about 26 percent. The area of the country affected by the two most intense drought categories (Extreme and Exceptional) has increased for fifteen consecutive weeks, a streak dating to mid-February. Much of this very intense drought is focused in the Southern Plains and Southern Rockies.
•According to data from the Storm Prediction Center, tornado activity during May was above average with 368 preliminary tornado reports. This was significantly less than the April 2011 tornado count, despite the fact that May is typically the most active tornado month of the year.
•The EF-5 tornado which hit Joplin, Missouri on May 22nd resulted in 141 fatalities. This was the deadliest single tornado in the modern record (since 1950) and the seventh deadliest tornado of those known to ever affect the United States.

Tuesday, June 7, 2011

Lincoln's First 100 F or Higher

The first 100 F or higher in 2011 occurred on June 6. This was the earliest in the year since June 6, 1969.

There have only been 5 occurrences of a first 100 F or higher earlier than June 6:
(May 24, 1967; May 29, 1934; June 2, 1911; June 4, 1960; June 5, 1933)

The earliest 100 F or higher temperature occurred on May 24 in 1967.

The latest first 100 F or higher occurred on September 5 in 1899.

There have only been 5 occurrences of a first 100 F or higher in Lincoln earlier than June 6: (May 24, 1967; May 29, 1934; June 2, 1911; June 4, 1960; June 5, 1933).

Note in some years Lincoln did not reach 100 F or higher and "none" is listed.

There were 24 years which had no temperatures reaching 100 F or higher:
(1889, 1891, 1893, 1896, 1902-06, 1908, 1915, 1920, 1923, 1949, 1958-59, 1965, 1968, 1972, 1986, 1992-94, 1996).

Click here for the link to the table showing the first 100 F or higher for Lincoln, NE, each year 1887 to present:

Friday, June 3, 2011

U.S. Year To Date (Jan-May 2011) Temperature Update

The average January 1-May 31, 2011 temperatures across the lower 48 states show a strong contrast across the U.S.

The northern Plains have averaged well below normal temperatures for this time period and the area to the west and north of a diagonal line stretching from the Great Lakes to Southern California has experienced near normal to below normal temperatures.

In contrast, the area to the south and east of a diagonal line stretching from the Great Lakes to Southern California has experienced near normal to above normal temperatures. Some smaller areas and much of Texas has experienced well above normal temperatures (along with a significant drought).

This pattern is consistent with the climatology of La Niña events. According to NOAA “La Niña often features drier than normal conditions in the Southwest in late summer through the subsequent winter. Drier than normal conditions also typically occur in the Central Plains in the fall and in the Southeast in the winter. In contrast, the Pacific Northwest is more likely to be wetter than normal in the late fall and early winter with the presence of a well-established La Niña. Additionally, on average La Niña winters are warmer than normal in the Southeast and colder than normal in the Northwest”.

Thursday, June 2, 2011

U.S. Year To Date (Jan-May 2011) Precipitation Update

Five months into the year finds a huge contrast in total January through May precipitation across the lower 48 states.

From southern Missouri and along the Ohio Valley and up into New York State, the total precipitation for the year to date is at 150% to 200% of normal.

There is also an area in Montana that has been receiving well above normal precipitation this year.

In contrast, Kansas, Oklahoma, western Texas and west through New Mexico and Arizona has areas with less than 25% of normal precipitation.

Lincoln, NE Climate Summary May 2011

May 2011 Climate Data for Lincoln, Nebraska
Warmest 96 F on May 9.
Coldest 30 F on May 3.
Monthly Average of all 31 days: 61.8 F, 0.2 deg. F below normal
Number of days above normal: 14
Number of days below nomal: 13
Number of days exactly normal: 4

Total Precipitation: 6.00 inches, 1.77 inches above normal (16th wettest out of 125 years of data, 1887-2011)
Wettest May: 10.72 inches, 1903
Driest May: 0.49 inches, 1934

Record warm minimum (low) temperature on May 9, 2011: 69 F
(old record was 68 F set in 1895)

Record warm minimum (low) temperature on May 10, 2011: 72 F
(old record was 69 F set in 1922)

Record warm maximum (high) temperature on May 10, 2011: 95 F
(old record was 93 F set in 1962 and 1911)

Record daily precipitation amount, May 19, 1.99 inches:
(old record was 1.62 set in 1977)