Drought Information Statement
Issued by NWS Austin/San Antonio, TX

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TXC013-019-021-029-031-053-055-091-123-127-137-149-163-171-177-
187-209-255-259-265-271-285-287-299-323-325-385-453-463-465-491-
493-507-281915-

Drought Information Statement
National Weather Service Austin/San Antonio TX
210 PM CDT Thu Apr 26 2018

...ABNORMALLY DRY TO EXTREME DROUGHT CONDITIONS WERE PRESENT OVER
SOUTH CENTRAL TEXAS...

SYNOPSIS...

Dry conditions continue across a large portion of the region.
April has been dry across the region and this has caused the
worst drought areas to expand. We continue to see cold fronts
moving through the region and so far in their wake we are
experiencing very low relative humidity values and gusty winds
which are not helping with the dry conditions that are present.
Many locations over the western third of south central Texas have
reported less than one inch of rainfall since January 1, 2018. We
are now into the wettest period of the year so the potential for
rainfall may increase. After two years of average to above average
rainfall area lakes and reservoirs remain in good shape with
levels the highest that have been observed in several years,
despite the recent lack of rainfall. Nine counties currently have
county-wide burn bans due to continuing dry conditions. Several
counties have seen grass and brush fires the last few months and
officials are expecting additional fires if wetting rains are not
observed.

The Climate Prediction Center (CPC) is forecasting La Nina
conditions will transition to ENSO neutral conditions from spring
into the summer. Even though La Nina and El Nino events have
significant impacts across South Texas, other circulations across
the globe help drive weather patterns too, so we should not just
be looking at one pattern, but others as well to potentially
provide rainfall for the region.

The US Drought Monitor (USDM) valid April 24th and issued on
April 26th indicated drought conditions getting worse across
the western portions of South Central Texas. Abnormally dry (D0)
to Extreme (D3) drought conditions were present across South
Central Texas. The driest locations were located along and to the
west of Interstate 35.

Currently 67 percent of the state is in Abnormally dry (D0) to
Exceptional (D4) drought. The eastern and northeastern parts of
the state currently have no drought.

SUMMARY OF IMPACTS...

FIRE DANGER IMPACTS...

Fire danger was low to moderate. During periods were wetting
rainfall is not observed then fire danger threats will continue to
increase.

As of April 26th, there were 9 counties with county-wide burn
bans in effect across south Central Texas. There were 24 counties
with no burn bans currently in effect.

Counties that currently have burn bans in place:

Dimmit
Edwards
Frio
Kinney
Llano
Travis
Uvalde
Val Verde
Williamson

Counties currently without county-wide burn bans:

Atascosa
Bandera
Bastrop
Bexar
Blanco
Burnet
Caldwell
Comal
DeWitt
Fayette
Gillespie
Gonzales
Guadalupe
Hays
Karnes
Kendall
Kerr
Lavaca
Lee
Maverick
Medina
Real
Wilson
Zavala

Residents in all counties should contact their local city or
county web site, Judge`s office or Fire Marshall before deciding
to conduct any type of outdoor burning as burn bans may be issued
before the next update of this drought statement.

The April 26th County Keetch-Byram Drought Index (KBDI) showed
the following KBDI values:

0-200        200-300     300-400      400-500     500-600

Bastrop      Comal       Atascosa     Bandera     Kinney
Bexar        Hays        Blanco       Dimmit      Maverick
Caldwell     Lavaca      Burnet       Edwards     Val Verde
Fayette      Medina      DeWitt       Gillespie
Gonzales     Travis      Frio         Kerr
Guadalupe    Williamson  Karnes       Llano
Lee          Wilson      Kendall      Real
                                      Uvalde
                                      Zavala

The Texas Forest Service uses the KBDI as a means for relating
current and recent weather conditions to potential or expected
fire behavior. The KBDI is a numerical index calculated daily for
each county. Each number is an estimate of the amount of
precipitation, in hundredths of an inch, needed to bring the soil
back to saturation. The index ranges from zero to 800, with zero
representing a saturated soil and 800 a completely dry soil.
Remember, that fire danger can change quickly from one day to
another as winds and relative humidity vary.

AGRICULTURAL IMPACTS...

The Texas Crop and Weather Report issued by Texas A&M on April
24th reported dry, windy conditions continued. Rain fell over
portions of the district with amounts ranging between 0.25 and 1
inch. Rain increased soil moisture and improved pastures
considerably. Fertilizer and herbicide applications were delayed
due to rain. Cool nights continued and slowed Bermuda grass
growth. Row crops were doing well. Spring sheep shearing
continued. Livestock conditions were good on average.

CLIMATE SUMMARY...

The next few days are expected to see little precipitation and
near to below average temperatures. By early May rainfall may
increase across the region with temperatures remaining below
average.

Precipitation from January 1, 2018 to midnight April 25, 2018 and
departure from normal:

                   2018       Normal  Departure from   Percent of
                                          Normal      Normal to
Date
Austin Mabry       6.19        8.64       -2.45          72%
Austin Bergstrom   8.50        9.08       -0.58          94%
San Antonio        6.57        7.52       -0.95          87%
Del Rio            0.33        4.05       -3.72           8%

For April to date, Del Rio has received 0.01 of an inch of rain.
This is 1.30 inches below the normal of 1.31 inches. The
average temperature for April to date is 71.5 degrees. This is
0.5 of a degree above the normal of 71.5 degrees.

For April to date, San Antonio International Airport has received
0.36 of an inch of rain. This is 1.30 inches below the normal of
1.66 inches. The average temperature at the San Antonio
International Airport for April to date is 67.8 degrees. This is
0.9 of a degree below the normal of 68.7 degrees.

For April to date, Austin Mabry has received 0.46 of an inch of
rain. This is 1.18 inches below the normal of 1.64 inches.
The average temperature at Austin Mabry for April to date is 67.1
degrees. This is 1.5 degrees below the normal of 68.6 degrees.

For April to date, Austin Bergstrom International Airport has
received 0.97 of an inch of rain. This is 0.82 of an inch below
the normal of 1.77 inches. The average temperature at the Austin
Bergstrom International Airport for April to date is 64.7
degrees. This is 1.9 degrees below the normal of 66.6 degrees.

PRECIPITATION/TEMPERATURE OUTLOOK...

The latest Climate Prediction Center (CPC) 8 to 14 day outlook
issued April 25th and valid May 3rd through May 9th was
indicating stronger signals for below average temperatures and
stronger signals for above average precipitation.

The longer range outlook for May 2018 through July 2018 created
on April 19th was indicating stronger signals for above average
temperatures and below average precipitation.

HYDROLOGIC SUMMARY AND OUTLOOK...

After one main rainfall event in late March the region has been
dry so far in April. On April 25th many locations saw the best
rainfall for April with amounts averaging one-quarter to one-half
inch with heavier amounts of one to two inches in a few
locations. The continued lack of rainfall has caused drought
conditions to continue and grow worse in areas across the Rio
Grande plains.

The 7 day stream flow averages for the Nueces, Medina, San Antonio
and lower Guadalupe basins were normal (25-75 percent) with the
Rio Grande, Frio, and Colorado basins seeing below normal
(10-24 percent) stream flows. The upper Guadalupe, Devils, Pecos
and upper Guadalupe river basins were reporting much below normal
(less than 10 percent) stream flows.

RESERVOIR CONDITIONS AS OF April 26th...

Below is a list of reservoirs with the latest elevations and
normal pools.

              Conservation Pool    Latest Elevation    Difference
                    (FT)                 (FT)             (FT)

Lake Amistad        1117                1091.8           -25.2
Medina Lake         1064.2              1044.3           -19.9
Canyon Lake          909                 905.4            -3.6
Lake Georgetown      791                 779.8           -11.2
Lake Buchanan       1020                1015.8            -4.2
Lake Travis          681                 667.8           -13.2

Restrictions...

The San Antonio Water System (SAWS) is currently in Year Round
water conservation measures.

Latest Readings from the Edwards Aquifer:

 Current      2017 Level   Departure    April  Departure from
  Level      on this date  from 2017   Average       Average

 661.3 FT      679.0 FT    -17.7 FT     667.1 FT      -5.8 FT

Many communities across South Central Texas continue to have
year round conservation measures in place.

The Barton Springs Edwards Aquifer Conservation District is
currently in no drought status.

Location          Current Water Restrictions

Fredericksburg    Stage 1
New Braunfels     Non-Stage Rules - Year round conservation
San Marcos        Year round conservation measures
Uvalde            Stage 1
Austin            Conservation Stage
Kerrville         Year round conservation measures

All cities continue to warn residents that stricter restrictions
could return at any time if drier conditions develop.

Locations that do not currently have mandatory restrictions
continue to strongly promote year round water conservation.

NEXT ISSUANCE DATE...

This product will be issued again on May 17, 2018 or sooner if
conditions warrant.

&&

RELATED WEB SITES...

For further information on the drought impacting South Central
Texas, please visit the following web addresses.

Austin/San Antonio National Weather Service:
weather.gov/austin
weatehr.gov/sanantonio
weatehr.gov/ewx

Climate Prediction Center:
cpc.ncep.noaa/gov

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

Office of the Texas State Climatologist:
climatexas.tamu.edu

United States Geologic Survey (USGS):
water.usgs.gov

United States Army Corps of Engineers (USACE):
swf.usace.army.mil

International BOundary and Water Commission:
ibwc.state/gov

Acknowledgments...

The drought monitor is a multi-agency effort involving NOAA`s
National Weather Service, National Climatic Data Center, the
USDA, State and Regional Center Climatologist and the National
Drought Mitigation Center. Information for this statement has
been  gathered from NWS and FAA Observation sites, State
Cooperative Extension Service, the USDA, USACE AND USGS.

QUESTIONS OR COMMENTS...

If you have any questions or comments about this Drought
Information Statement, please contact...

National Weather Service
2090 Airport Road
New Braunfels Texas 78130
830-606-3617 Press 2

$$



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