Drought Information Statement
Issued by NWS Des Moines, IA

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Drought Information Statement
National Weather Service Des Moines IA
1146 AM CDT Sun Aug 6 2017

...Severe Drought Conditions Continue to Expand across Southern
Iowa...

.SYNOPSIS...
Portions of southern Iowa have missed significant widespread
rainfall since May 1st and are now anywhere from 6 to 10 inches below
normal since that time. This is 50 to 80 percent below normal for
the bulk of the growing season with drought impacts increasing
rapidly in these areas. There has also been a narrow corridor drier
than normal conditions that extends to the northwest on an axis from
Knoxville through Des Moines towards Sioux City. While conditions in
this axis are not as dry as in southern Iowa, some locations in this
area remain well below normal for growing season precipitation.

Some of the hardest impacted areas are near Ottumwa where there has
been scant precipitation since June 1st. Total precipitation since
the beginning of summer has been a mere 1.98 inches at the Ottumwa
Airport which is 8.29 inches below normal. This is a paltry 19
percent of normal since the start of June. Temperatures have also
been above normal for much of this time adding to higher evaporation
rates.

.SUMMARY OF IMPACTS...
As of early August, severe drought conditions have expanded across
southern Iowa to include all or portions of 14 counties. This is
mainly centered on Highway 34 from near Creston to Ottuwma and
extends north and south from that line in about 30 miles to the north
and south. Abnormally dry and moderate drought conditions extend
northwest from the severe drought area into central and northwest
Iowa.

Open burn bans have been implemented in a couple of counties in the
severe drought area including Mahaska and Wapello counties.

Soil moisture continues to drop in southern Iowa and is in the 5 to
10th percentile ranking in the severe drought area.

.PRECIPITATION/TEMPERATURE OUTLOOK...
The outlook over the next two weeks has relatively high probabilities
of below normal temperatures across much of Iowa. This will help to
relieve some of the heat stress on crop. However, the precipitation
outlook remains near normal to drier than normal with no large
organized precipitation events expected at this time although there
may be some instance of localized heavier rainfall.

.HYDROLOGIC SUMMARY AND OUTLOOK...
The Chariton River Basin is the main watershed within the Severe
Drought location and according the USGS, all the river gauge sites
within this basin are in the Much Below Normal category for stream
flow levels as of Sunday August 6, 2017. This means that the the
streamflow is less than the tenth percentile for flow categories.

.NEXT ISSUANCE DATE...

This product will be updated in mid August or as necessary.

&&

.Related websites...

Local weather...climate and water information -
   http://weather.gov/desmoines

Drought Monitor and information -
   http://droughtmonitor.unl.edu
   http://www.cpc.ncep.noaa.gov/products/Drought/

Iowa State University Cooperative Extension Service -
   http://www.extension.iastate.edu/topic/recovering-disasters

Iowa Environmental Mesonet -
   http://mesonet.agron.iastate.edu

Additional River Information -
   USGS - http://water.usgs.gov
   COE  - http://www.mvr.usace.army.mil

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

.ACKNOWLEDGEMENTS...
The Drought Monitor is a multi-agency effort involving NOAA and the
National Weather Service and the National Centers for Environmental
Information, the USDA, and the State and Regional Climate Centers and
the Drought Mitigation Center. Information for this statement has
been gathered from the NWS and FAA observation sites, state
cooperative extension services, USDA, COE and USGS.

.QUESTIONS AND COMMENTS...

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

   Craig Cogil
   Climate Services focal point
   National Weather Service
   Johnston...IA 50131
   email: craig.cogil@noaa.gov

$$

Cogil

$$



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