MESONET TICKER ... MESONET TICKER ... MESONET TICKER ... MESONET TICKER ... July 15, 2011 July 15, 2011 July 15, 2011 July 15, 2011
Last 365 days driest since back to 1921 / July heat has records in its sights
According to data from the Oklahoma Mesonet, the last 365 days were the driest July 15-July 14 period on record in Oklahoma. In other words, the July 15, 2010 through July 14, 2011 statewide average precipitation total of 22.99 inches is drier than any other July 15-July 14 period dating back to 1921. The ugly truth is found in the table below.
Climate Division Total Dep from Normal Pct of Normal Rank since 1921 Panhandle 11.43" -9.67" 54% 2nd driest N. Central 18.54" -13.11" 59% 2nd driest Northeast 32.37" -9.60" 77% 17th driest W. Central 14.03" -15.06" 48% 1st driest Central 20.62" -17.37" 54% 1st driest E. Central 36.17" -9.92" 78% 20th driest Southwest 15.09" -15.71" 49% 1st driest S. Central 23.71" -17.25" 58% 2nd driest Southeast 35.75" -15.19" 70% 5th driest Statewide 22.99" -13.70" 63% 1st driest
Here's the uglier truth in pictures (no, not my picture ... real funny, now aren't you ashamed of yourselves?).
http://ticker.mesonet.org/archive/20110715/last365daystot.png http://ticker.mesonet.org/archive/20110715/last365daysdel.png
Apologies to Arnett and Hooker, but 8.3 inches and 9.1 inches of rain is no way to run a climate! They're just not as lucky as the water-logged eastern parts of the state that are ONLY around 70 percent of normal.
Those statistics will actually get worse in a few days when the last of the good rains from last summer start dropping off. While this drought started in the fall, it has its roots all the way back in mid-summer when the rainy first half of summer gave way to a hot and dry second half (which set up our flash drought situation last August).
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Amazing July Heat
The statewide average temperature from July 1-14 was 87.9 degrees, 6.8 degrees above normal. The average high temperature across the state over that time was 102.3 degrees, which is more than 9 degrees above normal.
Now I don't want to alarm anybody here, but I will anyway. The hottest July on record (since 1895) across the state occurred in 1954 with an average temperature of 88.1 degrees. So we're a couple of tenths of a degree behind that with traditionally the hottest part of the summer fast approaching.
http://ticker.mesonet.org/archive/20110715/july_historical_temps.png
Southwestern Oklahoma's average temperature in July has been 90.1 degrees with an average high temperature of 104.4 degrees. YIKES! Their warmest July on record occurred during the infamous summer of 1980 with an average of 89.1 degrees, so they are on their way to shattering that record by a full degree thus far.
http://ticker.mesonet.org/archive/20110715/july_historical_temps_SW.png
Remember, this is coming off the second warmest June on record, so how is the summer shaping up halfway through? The average statewide temperature for June 1-July 14 was 85 degrees. The record for summer (climatological summer runs from June 1-August 31) across the state is 85.2 degrees in 1934.
http://ticker.mesonet.org/archive/20110715/summer_historical_temps.png
The ugly truth indeed!
Gary McManus Associate State Climatologist Oklahoma Climatological Survey (405) 325-2253 gmcmanus@mesonet.org
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