Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

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September 2009

2 rivers exceeded flood stage: Neosho R. near Commerce (twice this month, both moderate flooding) and Verdigris R. near Lenapah (minor flooding)

Locations east of I-44 and Hwy 75 received 125% to 300% of the normal September rainfall. Elsewhere, 25% to 75%. Eastern Kay, western Osage, and western Pawnee Counties had the biggest deficits receiving 10% to 25% of normal rainfall for September.

Spavinaw Coop Observer reported 12.05 inches in Sept. 2009, with reports of over 1 inch of rain on 5 days and over 3 inches on 2 days this month.

RVS reported 10.44 inches and MKO reported 10.20 inches this month.

TUL: 17th coldest September (since1905) and 13th wettest September (since1888)

TUL: Set a daily rainfall record of 4.42" on 9/21/09. Old record was 3.50" in 1902.

FSM: 9th wettest September (tied with 1890) and 36th coldest September (since1882)

According to OCS, Southeast OK ranked as the 6th wettest September and the 4th wettest July-September period (since 1921). From Jan. 1-Sept 30, Southeast OK ranked 11th wettest; East Central OK ranked 26th wettest; and Northeast OK ranked 24th wettest.

An El Nino Advisory is in affect. El Nino continues and is still expected to become a moderate event later this fall and winter.

According to the Drought Monitor, no drought conditions exist across eastern OK or northwest AR.

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Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

September 2009 Highlights