Frigid Airmass to Bring Significantly Colder Temperatures; Snow Continues Downwind of the Great Lakes

A frigid cold airmass will bring significantly colder weather across the eastern two thirds of the country early this week. Record low temperatures are expected in the Southeast by Tuesday morning. Moderate to heavy lake effect snow will continue downwind of the Great Lakes through Monday. Several inches of snow accumulation is expected, including in portions of the Chicago Metro Read More >

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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