Drought Information Statement
Issued by NWS Oklahoma City, OK

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Drought Information Statement
National Weather Service Norman OK
925 AM CDT FRI APR 6 2018

...EXTREME TO EXCEPTIONAL DROUGHT COVERS THE WESTERN THIRD OF
   OKLAHOMA AND PART OF WESTERN NORTH TEXAS...

...MODERATE TO SEVERE DROUGHT COVERS PARTS OF NORTH CENTRAL...CENTRAL
   AND SOUTHWESTERN OKLAHOMA AND PART OF WESTERN NORTH TEXAS...

Synopsis...

This drought statement primarily describes conditions across the
western two-thirds of Oklahoma and a part of western north
Texas (the county warning area of the Norman Forecast Office).

According to the U.S. Drought Monitor, dated 3 April 2018, extreme
to exceptional drought conditions were impacting the area generally
along and west of an Enid to Anadarko to Frederick and
Vernon, Texas line.

Elsewhere, moderate to severe drought conditions were observed west
of a Ponca City to El Reno to Lawton and Seymour, Texas line.

The rest of Oklahoma has received ample precipitation.

The U.S. Drought Monitor uses five classifications, labeled
D0-D4

Drought Levels...

D0 - Abnormally Dry (not in drought but showing dryness)
D1 - Moderate Drought
D2 - Severe Drought
D3 - Extreme Drought
D4 - Exceptional Drought


A graphical depiction of drought conditions may be found online at
the National Weather Service Norman home page and the United States
Drought Monitor page.


Climate Summary...

First the good news. Since late January, significant improvement to
drought conditions occurred across south central and southeast
Oklahoma, and part of central Oklahoma.  This also extended into
eastern parts of western north Texas, including the Wichita Falls
area. This was mainly the result of several heavy precipitation
events, some of which caused flooding.  In general, areas along and
southeast of Interstate 44 in Oklahoma received 10 to 13 inches of
precipitation between early February and early April.

Now the bad news. Roughly the western third of Oklahoma remained
extremely dry, dating back to early October of 2017.  Parts of
western north Texas have been equally dry.  The hardest hit area has
been northwestern Oklahoma, where a few areas have received less
than an inch of rain since early October.  Now that is dry!


Precipitation last 180 days (October 7, 2017 - April 4, 2018)


CLIMATE       TOTAL          DEPARTURE          RANK SINCE
DIVISION  PRECIPITATION     FROM NORMAL            1921

--------     --------       -----------         ----------
N.CENTRAL      3.22"          - 7.26"            4th  driest
W.CENTRAL      1.87"          - 7.74"            3rd  driest
CENTRAL        8.35"          - 5.82"           19th  driest
SOUTHWEST      3.85"          - 7.07"            7th  driest
S.CENTRAL     14.23"          - 2.92"           47th  driest
SOUTHEAST     25.93"          + 1.69"           30th  wettest
STATEWIDE      9.73"          - 4.47"           25th  driest

OKLAHOMA CITY  7.25"           -6.07"           27th  driest


WESTERN NORTH TEXAS STATIONS

WICHITA FALLS  7.65"            -3.57"          40th  driest


PRECIPITATION (OCTOBER 2017-MARCH 2018)

GOODLETT 3W    2.26"
KNOX CITY 3NW  2.13"
ODELL 4ENE     6.67"
SEYMOUR 3NW    5.37"

Precipitation/Temperature Outlook...

The Climate Prediction Center 8-14 Day Outlook calls for slightly
better chances of below average precipitation, especially western
Oklahoma and western north Texas.  The outlook also predicts a better
chance of above average temperatures during the period.

The three month outlook from the Climate Prediction Center, which
covers the period of April through June, indicates much better
chances of above average temperatures and somewhat better chances of
below average precipitation, especially across southwest Oklahoma
and western north Texas.

Summary of Impacts...

Fire Danger:

Seasonal greening and moistening have decreased fire danger across
roughly the eastern half of Oklahoma and part of western north
Texas. However, fuels and drought conditions will keep the fire
danger very high across at least northwestern and west central
Oklahoma in the short term.  This will be especially true on very
warm and windy days.

Agriculture:
According to the USDA, well below average precipitation has had
an adverse impact on some crops and soil moisture, especially
areas impacted by extreme to exceptional drought.

Rating                      Good        Fair        Poor to Very Poor
(Conditions as of April 1, 2018)

Wheat                        9%          45%             46%
Rye                          4%          21%             74%
Oats                        10%          37%             52%
Canola                       8%          42%             50%
Livestock                   50%          38%             10%
Pasture and range           16%          50%             34%



Hydrologic Summary and Outlook...

According to the U.S. Geological Survey (USGS), the 7-day average
streamflow was near normal across most river basins in the southern
half of Oklahoma, while streamflows in northwestern and north
central Oklahoma were below normal. Streamflow conditions were much
below normal, with streamflows less than the tenth percentile, in
parts of the North Canadian and Cimarron river basins in
northwestern Oklahoma. The 7-day average streamflow was near normal
across most rivers and creeks in western north Texas, but
streamflows in the upper portions of the Wichita river basin were
below normal.

With respect to hydrologic drought conditions, moderate drought
conditions were present in the North Canadian river basin in
northwestern through central Oklahoma. Moderate drought conditions
were also occurring in the Cimarron River basin in central Oklahoma.
Below normal precipitation conditions were occurring in many rivers
and creeks in other areas of northwestern and north central
Oklahoma. Below normal precipitation conditions were also present in
most of the Wichita River basin in western north Texas.

According to the U.S. Army Corps of Engineers (COE), the Oklahoma
Water Resources Board (OWRB), and the Texas Water Development Board
(TDWB), the majority of the area reservoirs were at or near the top
of their conservation pools. Specific data for these reservoirs are
listed in the table below.

---------------------------------------------------------------------
                       Top of   Current  Percent
Reservoir              Normal    Pool       of
                        Pool     Elev     Normal
                      (FT MSL) (FT MSL)    Pool
------------------------------------------------------------

*** Arkansas River Basin ***

Great Salt Plains Lake 1125.0   1125.27    101%
* Kaw Lake             1009.0   1009.67     98%
Fort Supply Lake       2004.0   2004.55    101%
Lake Hefner            1199.0   1197.31     94%
Canton Lake            1615.4   1615.51    100%
Lake Overholser        1242.0   1240.16     85%
Arcadia Lake           1006.0   1006.90    103%
Lake Thunderbird       1039.0   1039.34    102%

*** Red River Basin ***

Altus Lake             1559.0   1552.53     73%
Tom Steed Lake         1411.0   1410.85     99%
Lake Ellsworth         1235.0   1232.45     99%
Lake Lawtonka          1345.6   1341.83     93%
Lake Kemp              1144.0   1142.21     89%
Lake Kickapoo          1045.0   1042.47     84%
Lake Arrowhead          926.4    924.62     92%
Waurika Lake            951.4    952.00    105%
Foss Lake              1642.0   1641.75     99%
Fort Cobb Lake         1342.0   1342.30     99%
Arbuckle Lake           872.0    872.57    103%
Lake Texoma             615.0    616.49    104%
Atoka Lake              590.0    589.35     99%
McGee Creek Lake        577.1    577.65    102%

*** Brazos River Basin ***

Millers Creek Rsvr.    1334.5   1332.59     89%

---------------------------------------------------------------------

RESTRICTIONS...

In Oklahoma, a governor`s burn ban is in effect for roughly the
western third of Oklahoma.

In western north Texas, Baylor and Wilbarger counties have outdoor
burn bans.

Oklahoma City has a year-round odd/even water restriction plan.


Next Issuance Date...

This statement will be updated on or around May 1st.


&&

Related Websites...

National Weather Service Norman
https://weather.gov/oun/

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

NOAA Drought Information Center:
http://noaanews.noaa.gov/drought

USDS - National Agricultural Statistics Service
https://www.nass.usda.gov/

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

National Integrated Drought Information System (NIDIS)
http://www.drought.gov

U.S. Drought Monitor
http://www.drought.unl.edu/dm/monitor.html

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

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

USGS WaterWatch - Streamflow conditions
https://waterwatch.usgs.gov

Oklahoma Forestry Services
http://www.forestry.ok.gov

Texas A&M Forest Service
http://tfsdev.tamu.edu

Acknowledgments...

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. The U.S. Drought Monitor 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.

Questions or Comments...

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

National Weather Service Norman
National Weather Center
120 David L. Boren Blvd.
Suite 2400
Norman, OK 73072
Phone: (405) 325-3816
Email: sr-oun.webmaster@noaa.gov

$$


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