Drought Information Statement
Issued by NWS Rapid City, SD

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Drought Information Statement
National Weather Service Rapid City SD
840 AM MDT Thu Sep 21 2017

...Drought Conditions Decrease Slightly Across Western South
Dakota...

SYNOPSIS...

Drought conditions did not change much this past week across western
South Dakota and northeastern Wyoming, although some beneficial
rains, especially over northwestern South Dakota, have eased the
drought somewhat in that area.

The latest U.S. Drought Monitor depicts:

* Extreme (D3) drought conditions across far southwestern Ziebach,
  eastern Meade, far northeastern Pennington, western Haakon,
  and northern Jackson Counties.
* Severe (D2) drought conditions covered the rest of Ziebach,
  Jackson, and Haakon Counties, as well as Perkins and parts of
  northeastern Harding, eastern Butte, central Meade, eastern
  Pennington, eastern Bennett, western Mellette, and western Todd
  Counties in South Dakota.
* Moderate (D1) drought in South Dakota covered the rest of Harding,
  Butte, Meade, Bennett, Mellette, and Todd Counties, as well as
  central Pennington, eastern Custer, northeastern Fall River, most
  of Oglala Lakota, and Tripp Counties. In northeastern Wyoming,
  Moderate (D1) drought conditions covered far northern Campbell and
  northern Crook Counties.
* Abnormally dry (D0) conditions covered northeastern Weston, the
  rest of Crook, and northern Campbell Counties in northeastern
  Wyoming, as well as rest of western South Dakota.

SUMMARY OF IMPACTS...

Drought impacts continue to be reported by agricultural producers.
Many impacts are related to crop failures in winter and spring
wheat. Other substantial impacts include cattle deaths due to poor
water quality and an increase in cattle sales due to feed shortages
and poor growth in pastures and hay lands. Soil moisture continues
to dry out, with the latest USDA South Dakota Crop Progress and
Condition Report indicating topsoil moisture supplies rated at 48
percent very short or short and subsoil moisture supplies rated at
63 percent short or very short. Also, reports now indicate the
pheasant population is beginning to suffer due to the drought
conditions.

Several counties in western South Dakota have declared local
emergency drought disaster resolutions and Governor Dennis Daugaard
has already declared a statewide drought emergency for South Dakota.
Transport restrictions have been eased, allowing the movement of
oversized loads of hay and feed with proper signage and reflectors
and landowners adjacent to highways may mow and bale hay along state
highways.

CLIMATE SUMMARY...

Overall August was cooler than average with below normal
precipitation amounts. Seasonal and annual precipitation continues
to be well below average.

PRECIPITATION/TEMPERATURE OUTLOOK...

Sea surface temperatures in the tropical Pacific Ocean are trending
below average, but still indicating neutral El Nino Southern
Oscillation (ENSO) conditions. The outlook for the fall and winter
is for possible La Nina conditions to develop. For the northern
plains in the fall, this typically means the temperatures will trend
near to above average and precipitation will continue to trend below
average. For winter in the northern plains, temperatures should
trend near to below average and precipitation would be near to
slightly above average, indicating a few more storms may be
possible. Overall, precipitation in the winter is only around an
inch for the December through February time period and is only about
7% of the annual precipitation.

The outlook for the rest of September into early October calls for
below average transitioning to above average temperatures, with near
average precipitation.

The one-month outlook for October (as well as the three-month
outlook for October, November, and December) calls for increased
odds toward above-average temperatures and equal chances for above,
below, and near-average precipitation.

HYDROLOGIC SUMMARY AND OUTLOOK...

According to the Bureau of Reclamation, reservoir levels at
Angostura, Deerfield, Keyhole, and Pactola were above average for
this time of the year. However, end of the month reservoir
elevations in August at Belle Fourche and Shadehill were below
average.

According to the U.S. Geological Survey 28-day average streamflow
compared to historical streamflow for the day of the year indicates
normal to below normal conditions across much of the area.

NEXT ISSUANCE...

The next drought statement will be issued around September 28, 2017.

&&

ACKNOWLEDGMENTS...

The drought monitor is a multi-agency effort involving NOAA`s
National Weather Service and the National Centers for Environmental
Information, United States Department of Agriculture (USDA), State
and Regional Climate Centers, and the National Drought Mitigation
Center at the University of Nebraska-Lincoln. Information for this
statement has been gathered from the NWS and Federal Aviation
Administration observing sites, State Cooperative Extension
Services, United States Department of Agriculture, Bureau of
Reclamation, and the United States Geological Survey.

QUESTIONS OR COMMENTS...

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

Melissa Smith
Service Hydrologist
National Weather Service
300 East Signal Drive
Rapid City South Dakota 57701
605-341-9271
melissa.smith@noaa.gov

RELATED WEB SITES...

U.S. Drought page...
http://www.drought.gov

South Dakota Climate and Weather Information...
http://climate.sdstate.edu

Wyoming Water and Climate Information...
http://www.wrds.uwyo.edu/

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

River and Reservoir Information
NWS - http://water.weather.gov/ahps
USGS - http://www.usgs.gov/water
USBR - http://www.usbr.gov/gp/lakes_reservoirs

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

Black Hills Fire Restrictions...
http://blackhillsfirerestrictions.com

$$

Smith



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