Drought Information Statement
Issued by NWS Tulsa, OK

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Drought Information Statement
National Weather Service TULSA OK
954 AM CDT Thu Sep 8 2022

...Moderate to Extreme Drought conditions continue across eastern
Oklahoma and northwest Arkansas...

.SYNOPSIS:

.Drought intensity and extent: Rainfall over the last month has
helped to improve the drought conditions primarily across a portion
of northwest Arkansas. However, moderate to extreme drought remains
across much of eastern Oklahoma and west central Arkansas.

According to the U.S. Drought Monitor (USDM) valid September 6,
2022, Extreme (D3) Drought conditions were occurring in portions of
Osage, Washington, Nowata, Craig, Ottawa, Delaware, Mayes, Rogers,
Tulsa, Wagoner, Okfuskee, Okmulgee, McIntosh, Pittsburg, Haskell,
Latimer, Le Flore, Pushmataha, and Choctaw Counties in eastern
Oklahoma. Severe (D2) Drought conditions exist in portions of Osage,
Pawnee, Tulsa, Rogers, Creek, Okmulgee, Muskogee, Wagoner, Delaware,
Cherokee, Adair, Sequoyah, McIntosh, Haskell, Pittsburg, Pushmataha,
and Le Flore Counties in eastern Oklahoma, and Washington, Crawford,
Sebastian, and Franklin Counties in northwest Arkansas. Moderate
(D1) Drought conditions were present in portions of Okmulgee,
McIntosh, Muskogee, Wagoner, Cherokee, Delaware, Adair, Sequoyah,
Haskell, and Le Flore Counties in eastern Oklahoma, and Carroll,
Madison, Washington, Franklin, and Sebastian Counties in northwest
Arkansas. Abnormally Dry (D0) conditions were occurring in portions
of Delaware, Cherokee, Adair, Sequoyah, Haskell, and Le Flore
Counties in eastern Oklahoma, and Benton, Washington, and Madison
Counties in northwest Arkansas.

The USDM is a collaborative effort between several government and
academic partners. It is a weekly national product issued on
Thursday morning using data collected through the previous Tuesday
morning, so it does not consider precipitation which has fallen
after the data cut-off time.

There are five levels of intensity depicted on the USDM. The USDM
levels are the following:
D0 - Abnormally Dry (not in drought but
showing dryness)
D1 - Moderate Drought
D2 - Severe Drought
D3 - Extreme Drought
D4 - Exceptional Drought

The local Drought Information Statement is issued by the NWS office
in Tulsa when needed to supplement the national USDM product. Local
statements may be issued monthly during times when the USDM
indicates extreme drought conditions or as local conditions warrant.

.Precipitation: For the 7-day period ending September 6, 2022,
rainfall across eastern Oklahoma and northwest Arkansas ranged from
around 0.10 inches to 4 inches.

For the last 30 days ending September 6, 2022, rainfall totals
across the area ranged from 0.50 inches to around 7 inches, with the
highest totals primarily across southeast Oklahoma and northwest
Arkansas.

According to the Oklahoma Climatological Survey (OCS, state climate
office and mesonet), for the last 30 days ending September 6, 2022,
northeast Oklahoma ranks as the 29th driest period since records
began in 1921. East central Oklahoma ranks as the 47th driest, and
southeast Oklahoma ranks as the 37th wettest.

.Hydrologic Conditions: According to the U.S. Army Corps of
Engineers (COE), several reservoirs in eastern Oklahoma were below 3
percent of the top of their normal conservation pool levels as of
September 7, 2022: Heyburn Lake 72 percent, Hugo Lake 76 percent,
Wister Lake 79 percent, Copan Lake 82 percent, Birch Lake 84
percent, Eufaula Lake 85 percent, Skiatook Lake 88 percent,
Tenkiller Lake 88 percent, Keystone Lake 92 percent, Sardis Lake 94
percent, and Beaver Lake 96 percent.

According to the U.S. Geological Survey (USGS), the 7-day average
streamflow as of September 6, 2022 was much below normal (less than
the 10th percentile) at the Red River at Arthur City. The 7-day
average streamflow was below normal (10th-24th percentile) at the
following gages: Black Bear Creek at Pawnee, Arkansas River near
Haskell, Caney River near Ramona, Verdigris River near Lenapah,
Neosho River near Chouteau, and the Fourche Maline near Red Oak.


.SUMMARY OF IMPACTS:
.Soil Moisture Impact: The OCS daily averaged fractional water index
for September 6, 2022 shows values of 0.1 to 0.9 (where 1.0 is
saturated and 0.0 is completely dry) at 2 and 4 inches below ground
across eastern Oklahoma, with values of 0.5 to 0.7 for most of the
area. At 10 inches below ground across eastern Oklahoma, smaller
areas of 0.7 to 1.0 were present, with a larger portion of the area
having values of 0.1 to 0.5. At 24 inches below ground, the majority
of eastern Oklahoma had values of only 0.1 to 0.4.

As of September 7, 2022, the Arkansas-Red Basin River Forecast
Center (ABRFC) gridded soil moisture indicates that the upper zone,
which responds to short-term rainfall, is 1 to 40 percent full
across much of the drought area of eastern Oklahoma and northwest
Arkansas, with a large portion of the area 20 to 30 percent full.
These values correspond to 150 percent to less than 30 percent of
normal. The lower zone was 5 to 30 percent full across much of
eastern Oklahoma and northwest Arkansas, which represents severe to
slight hydrologically dry conditions. The lower zone anomalies were 90
percent to less than 30 percent of normal, with a large portion of
30 to 90 percent of normal.

.Fire Impacts: Burn bans were in effect as of September 7, 2022 for
the following counties: Craig and Tulsa.

.Agriculture Impacts: According to the OSU Extension Service, pecans
may be reduced in size and quality due to a lack of water during the
growing season, which may mean a smaller harvest this fall.


.DROUGHT MITIGATION ACTIONS: None reported.


.LOCAL DROUGHT OUTLOOK: Above normal temperatures are expected
through Saturday across eastern Oklahoma and northwest Arkansas.
Most of the next 7 days is expected to remain dry, but there is a
low chance for showers on August 11 as a cold front moves through
the area.

The CPC 8-14 Day Outlook valid September 14-20, 2022, calls for an
enhanced chance for above normal temperatures and below normal
rainfall across eastern Oklahoma and northwest Arkansas.

Beyond this period, the CPC outlook for September 2022 (issued
August 31, 2022) indicates an equal chance for above, near, and
below normal temperatures across all of eastern Oklahoma and
northwest Arkansas. There is also a slightly enhanced chance for
above median rainfall across far southeast Oklahoma, and equal
chances for above, near, and below median rainfall elsewhere across
eastern Oklahoma and northwest Arkansas.

.NEXT ISSUANCE DATE: The next Drought Information Statement will be
issued on or near October 7, 2022.

.RELATED WEB SITES:

U.S. Drought Portal
https://www.drought.gov

U.S. Drought Monitor
https://droughtmonitor.unl.edu

National Weather Service Tulsa http://weather.gov/tulsa/drought_info
https://weather.gov/tulsa

Arkansas-Red Basin River Forecast Center
https://weather.gov/abrfc/drought

Oklahoma Climatological Survey Drought Tools
http://climate.ok.gov/index.php/climate/category/drought_wildfire

Arkansas Forestry Commission
https://www.arfireinfo.org

Oklahoma Forestry Commission
https://www.forestry.ok.gov

U.S. Army Corps of Engineers Tulsa District
https://www.swt-wc.usace.army.mil

U.S. Geological Survey Realtime Data
https://waterdata.usgs.gov/nwis/rt

Climate Prediction Center
https://www.cpc.ncep.noaa.gov


.ACKNOWLEDGEMENTS:

The U.S. Drought Monitor is a collaborative effort between several
government and academic partners including the NWS, the National
Climatic Data Center, the USDA, state and regional climatologists,
and the National Drought Mitigation Center.
Information for this statement has been gathered from NWS and FAA
observation sites, the Oklahoma Climatological Survey, the USACE and
the USGS.

.CONTACT INFORMATION:

If you have any questions or comments about this drought information
statement, please contact,

National Weather Service Tulsa
10159 E. 11th St. Suite 300 Tulsa
Oklahoma 74128
Phone:   918-838-7838
Email:   sr-tsa.webmaster@noaa.gov

$$


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