Public Information Statement
Issued by NWS Houston/Galveston, TX

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NOUS44 KHGX 101327 CCA
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TXZ163-164-176>179-195>200-210>214-226-227-235>238-100900-

PUBLIC INFORMATION STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
827 AM CDT Sun Sep 10 2017

...August 2017 ended with record rainfall from Tropical Storm Harvey...

The main story for this past month is the heavy rainfall that resulted
from the passage of Tropical Storm Harvey.  Harvey brought flooding to
many parts of Southeast Texas as the storm spent the better part of
five days over the area.  Rainfall averaged over 30 inches across large
portions of the area and isolated locations received 40 to 50 inches.

Harvey generated most of the August rainfall for many locations.  At the
first- and second-order climate sites, the storm`s five-day total was
over half of the total normal annual rainfall!  Equally impressive is
fact that rainfall from TS Harvey caused many of the COOP sites to
experience over half of their normal annual rainfall for just the month
of August.

The following table shows the five-day rainfall for Tropical Storm
Harvey and compares it to the normal annual rainfall for each first-
and second-order climate site.


...Harvey Rainfall/Annual Comparison for the Major Climate Sites...

                   TS Harvey       Norm Annual         Percent of
Site             Rnfl (inches)      Rainfall           Normal Rnfl

Houston             31.26             49.77                62.8
Galveston           22.84             50.76                45.0
College Station     15.74             40.06                39.3
Hobby Airport       37.01             54.65                67.7
Conroe              21.44             48.49                44.2
Huntsville          19.72             46.14                42.7
DW Hooks            27.01             50.48                53.5
Sugar Land          22.67             49.48                45.8
Angleton            18.48             50.86                36.3
Palacios             7.84             44.59                17.6
Pearland            34.43             52.69                65.3
NWS League City     43.91             56.81                77.3


The following table compares the COOP August rainfall to the annual
percent of normal rainfall.


   ...COOP August Rainfall and Annual Rainfall Comparison...

                        August Rnfl       Norm Annual     Percent of
Site                     (inches)          Rainfall       Normal Rnfl

Baytown                    52.07            59.92            86.9
Bellville 6 NNE            22.73            41.72            54.5
Brenham                    18.99            45.14            40.7
Columbus                   22.56            43.93            51.4
Conroe (COOP)              37.31            48.77            76.5
Crockett                   10.30            45.18            22.8
Danevang 1 W               16.05            46.38            34.6
Freeport 2 NW              21.96            49.57            44.3
Houston-N Houston          34.89            52.04            67.0
Houston-Westbury           33.54            51.82            64.7
Huntsville (COOP)          25.94            49.08            52.9
Katy Wolf Hill             38.75            45.53            85.1
Madisonville               11.07            45.12            24.5
Montgomery                 24.66            46.77            52.7
Richmond                   34.65            49.08            70.6
Somerville Dam             16.63            38.67            43.0
Washington State Park      25.67            41.68            61.6
Wharton                    26.44            47.21            56.0


Because Harvey brought clouds and rainfall for at least five days to
much of Southeast Texas, the average temperatures for the month was
almost normal at many climate sites.  The storm also ended a developing
drought situation that was especially being felt over those areas to the
north and west of the Houston metropolitan area.

The following three sections detail what was noted for August from the
U.S. Drought Monitor, the temperature and rainfall records, and the
temperature and rainfall extreme data.

U.S. Drought Monitor...
The month of August began with abnormal dryness developing across the
northwestern set of counties with moderate drought in the western
portions of Burleson and Washington counties.  By the 22nd, abnormal
dryness had spread east and northeastward into areas east of College
Station into the Huntsville area.  Widespread heavy rainfall from
Tropical Storm Harvey brought flooding to many areas and ended the
drying trend.  The following table lists the abnormal dry or drought
conditions by county as noted by the U.S. Drought Monitor.


For the week ending
August 1st. . .D-0 in Brazos, Burleson, Washington, and Austin counties
               D-1 in Burleson and Washington counties

August 8th. . .D-0 in Brazos, Burleson, Washington, and Austin counties

August 15th . .D-0 in Burleson, Washington, and Austin counties

August 22nd . .D-0 in Houston, Madison, Walker, Montgomery, Grimes,
               Brazos, Burleson, Washington, Austin, and Colorado
               counties
               D-1 in Colorado County

August 29th . .none


Note, here are the U.S. Drought Monitor relationships for D-0 and D-1:
- D-0...Abnormal Drying
- D-1...Moderate Drought


Record temperature and rainfall data...
There were 28 temperature records and 11 daily rainfall records tied or
set at the first-order climate sites in August.  Of the rainfall records,
all but one were set during the time Tropical Storm Harvey moved across
Southeast Texas.  The following is a listing of the records tied or set
during the month at College Station (CLL), Galveston (GLS), Hobby
Airport (HOU), and Houston (IAH).


 ...Record Temperature and Rainfall Data for August 2017...

Site    Date     Record Type       New Record    Prev Record

 CLL    08/07    Daily Rainfall       2.62       1.40 in 1945
 CLL    08/26    Low Max Temp          77        tied 1959
 CLL    08/27    Low Max Temp          76        78 in 1923
 CLL    08/27    Daily Rainfall       7.45       1.35 in 1977
 CLL    08/28    Daily Rainfall       3.30       2.68 in 1915

 GLS    08/14    High Min Temp         84        tied 2010 & prev
 GLS    08/15    High Min Temp         84        tied 2012 & prev
 GLS    08/16    High Min Temp         85        tied 2012
 GLS    08/17    High Min Temp         84        tied 2014 & prev
 GLS    08/18    High Min Temp         84        tied 2014 & prev
 GLS    08/26    Daily Rainfall       4.12       2.06 in 1953
 GLS    08/28    Low Max Temp          80        81 in 1934 & 1915
 GLS    08/29    Low Min Temp          70        tied 1986 & prev
 GLS    08/29    Low Max Temp          74        81 in 1986 & 1948
 GLS    08/29    Daily Rainfall       8.64       4.61 in 1953
 GLS    08/30    Low Min Temp          70        tied 1946 & prev

 HOU    08/01    High Min Temp         80        tied 2009
 HOU    08/06    High Min Temp         80        tied 2011
 HOU    08/11    High Min Temp         81        tied 2007
 HOU    08/14    High Min Temp         81        80 in 2015
 HOU    08/15    High Min Temp         81        80 in 2010
 HOU    08/16    High Min Temp         82        79 in 2012 & prev
 HOU    08/17    High Min Temp         82        79 in 2012 & prev
 HOU    08/19    High Min Temp         80        tied 2011
 HOU    08/21    High Min Temp         81        79 in 2014 & prev
 HOU    08/26    Daily Rainfall      12.07       3.33 in 1959
 HOU    08/28    Low Max Temp          79        tied 2001
 HOU    08/28    Daily Rainfall       9.41       1.09 in 1969
 HOU    08/29    Low Max Temp          76        78 in 2001

 IAH    08/08    Daily Rainfall       3.61       1.66 in 1920
 IAH    08/14    High Min Temp         81        tied 1951
 IAH    08/16    High Min Temp         82        80 in 2014 & prev
 IAH    08/17    High Min Temp         81        80 in 1968 & prev
 IAH    08/26    Daily Rainfall       8.37       1.66 in 1959
 IAH    08/27    Low Max Temp          77        78 in 1945
 IAH    08/27    Daily Rainfall      16.07       8.32 in 1945
 IAH    08/28    Low Max Temp          74        79 in 1936 & 1915
 IAH    08/28    Daily Rainfall       4.00       3.88 in 1915
 IAH    08/29    Low Max Temp          75        76 in 1895


Extreme temperature and rainfall data...
Here are the details of the daily extreme temperature and rainfall data
for August 2017 at the first- and second-order sites, including the COOP
site at the National Weather Service Office in League City:

- Warmest daily maximum temperature...101 at LVJ on the 19th
- Coldest daily minimum temperature... 67 at CXO on the 1st
                                       67 at PSX on the 31st
- Warmest daily average temperature... 91 at HOU on the 17th
- Coolest daily average temperature... 69 at PSX on the 28th
- Highest daily rainfall..............16.08 at HGX on the 27th

The following table lists individual site temperature and rainfall
extremes for the month measured at area airports.


                    August 2017 Extreme Data

      Daily Max    Daily Min      Daily Average Temp       Max RNFALL
Site  TMP Dates    TMP Dates    Max Dates    Min Dates     PCPN Dates

IAH    99  18th     71  28th     89  18th *   73  28th    16.07  27th
GLS    93  16th     70  30th *   89  16th     72  29th     8.64  29th
CLL   100  23rd *   70  31st *   90  17th     73  27th     7.45  27th
HOU   100  19th *   73  29th *   91  17th     75  29th    12.07  26th
CXO    98  19th     67   1st     88  17th     71  28th    11.96  27th
UTS    99  19th *   69  29th     89  19th *   71  28th    11.32  27th
DWH    98  20th *   70  28th *   89  17th *   72  28th    15.49  27th
SGR    99  27th *   72  31st *   89  17th     76  29th     7.13  28th
LBX #  96  18th     72  22nd     88  16th     76  29th     5.71  28th
PSX    94  23rd     67  31st *   87  16th     69  28th     6.21  25th
LVJ   101  19th     74  31st *   90  19th *   75  29th    11.58  28th
HGX    96  19th *   71  29th     88  17th *   73  29th    16.08  27th

*  Note:  The last date of occurrence is noted in the table.
#  Note:  The Angleton/Lake Jackson Airport has missing data on the
   30th and 31st due to the sensor becoming flooded from river
   flooding.


The following table lists the preliminary monthly temperature and
rainfall data for the first- and second-order climate sites across
Southeast Texas in addition to the COOP site at the League City National
Weather Service office.


                        August 2017 Data

        AVE     AVE     Monthly AVE      Monthly       Year-to-Date
Site    High    Low     Daily   DEP    Rain    DEP     Rain    Dep

IAH     91.3    76.0    83.7   -0.9   39.11  +35.35   70.82  +38.95
GLS     88.8    79.0    83.9   -1.1   26.67  +22.28   50.45  +19.27
CLL     93.3    75.4    84.4   -0.9   21.02  +18.34   44.16  +18.64
HOU     93.2    78.2    85.7   +1.5   38.87  +33.81   67.12  +32.02
CXO     90.2    72.7    81.5   -1.3   24.63  +21.29   50.53  +20.36
UTS     91.4    75.2    83.3   -1.2   21.35  +18.00   48.38  +19.04
DWH     91.1    75.2    83.2   +0.6   32.71  +28.01   60.57  +28.48
SGR     93.4    76.0    84.7   +1.3   29.99  +25.85   65.78  +34.24
LBX *   91.1    75.7    83.4   +0.8   21.37  +17.74   41.68  +10.40
PSX     87.7    75.2    81.5   -2.8   13.16  +10.20   34.84   +7.10
LVJ     92.6    78.2    85.4   +2.1   37.34  +32.99   67.14  +34.04
HGX     90.4    76.7    83.5   +1.4   47.69  +45.52   75.31  +40.55

* Note:  The Angleton/Lake Jackson Airport has missing data on the
  30th and 31st due to the sensor becoming flooded form river
  flooding.


The following table lists the rainfall data from the volunteer network
of CO-OP observers.  Note that some of these numbers are incomplete and
may be updated at a later date.  Year-to-date totals reflect any updates
to previous months during the year.

         COOP Rainfall Observations for August 2017

                                    Monthly           Year-to-Date
Location                         Rain     Dep         Rain     Dep

Anahuac                           *        *         28.83    -2.99 *
Angleton 2 W                      *        *         26.29    -4.35 *
Bay City Water Works              *        *         22.51    -4.62 *
Baytown                         52.07   +47.26       90.79   +52.43
Bellville 6 NNE                 22.73   +19.87       45.74   +18.83
Brenham                         18.39   +15.46       41.77   +13.88
Caldwell                          *        *         25.91    +3.26 *
Cleveland                         *        *         27.99    -1.96 *
Columbus                        22.56   +19.69       50.73   +22.12
Conroe COOP                     37.31   +33.70       65.63   +35.27
Crockett                        10.30    +7.27       44.81   +15.50
Cypress                           *        *         29.21    +3.40 *
Danevang 1 W                    16.05   +12.54       38.05    +8.65
Eagle Lake Research Center      20.37      N/A       46.45      N/A
El Campo                        14.91      N/A       48.23      N/A
Freeport 2 NW                   21.96   +17.94       47.56   +17.86
Houston-North Houston           34.89   +30.50       65.94   +31.54
Houston Westbury                33.54   +28.84       69.72   +36.37
Huntsville COOP                 25.94   +22.27       60.49   +29.58
Katy Wolf Hill                  38.75   +35.17       67.13   +38.93
Lake Livingston                 18.45      N/A       41.46      N/A
Liberty                           *        *         34.00    -0.51
Livingston 2 NNE                  *        *         26.43    -3.00
Madisonville                    11.07    +8.16       36.03    +7.47
Matagorda No 2                    *        *         19.23    -5.91
Montgomery                      24.66   +24.66       55.52   +21.30
New Caney 2 E                     *        *         30.55    +0.20
Richmond                        34.65   +30.06       68.70   +38.06
Somerville Dam                  16.63   +14.13       37.84   +13.47
South Madisonville              17.43      N/A       36.26      N/A #
Thompsons 3 WSW                   *        *         26.46    +0.30
Washington State Park           25.67   +22.88       50.03   +23.52
West Columbia 1 ESE             16.33      N/A       45.50      N/A
Wharton                         26.44   +22.51       51.83   +22.49

* Note:  August data is unavailable for these sites.  The year-to-date
  data for these stations have been updated through the end of July.

# Note:  South Madisonville did not report rainfall for June or July.
  The year-to-date total for the station does not include these two
  months.

$$

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