PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
208 PM CST MAY 1 2013

...DROUGHT EASED AND APRIL 2013 CONTINUED A COOLING TREND...

MUCH NEEDED RAINFALL FELL ACROSS SOUTHEAST TEXAS IN APRIL 2013 AND
ABNORMALLY DRY TO MODERATE DROUGHT CONDITIONS WERE EASED BY THE NEAR
TO ABOVE NORMAL PRECIPITATION. THE EFFECT OF THE RAIN WAS THEN
AMPLIFIED BY BELOW NORMAL TEMPERATURES.

A SERIES OF COLD FRONTS WAS RESPONSIBLE FOR THE WETTER AND COOLER
CONDITIONS. THE MONTH BEGAN WITH TWO COLD FRONTS PUSHING THROUGH 
THE STATE AND WITH A COLD AIR MASS FOLLOWING. THREE MORE COLD AIR
MASSES SETTLED ACROSS SOUTHEAST TEXAS FOLLOWING FRONTAL PASSAGES
THROUGHOUT THE REMAINDER OF THE MONTH. EACH BROUGHT TEMPERATURES OF
BETWEEN 10 AND 15 DEGREES BELOW THE DAILY NORMALS FOR MANY OF THE
FIRST AND SECOND-ORDER CLIMATE SITES. APRIL ENDED WITH THE MONTHLY
NORMALS RANGING BETWEEN 1.0 AND 3.5 DEGREES BELOW NORMAL.

THE WET START TO APRIL ENDED THE DRYING TREND WHICH HAD OCCURRED
OVER MOST OF SOUTHEAST TEXAS BETWEEN MID JANUARY AND THE END OF
MARCH. EVENTS ON THE 2ND AND 27TH OF APRIL BROUGHT HEAVIER RAINFALL
AMOUNTS TO PORTIONS OF THE AREA...AND GREATER THAN 6 INCHES OF RAIN
WAS RECORDED AT HOBBY AIRPORT AND SUGAR LAND ON THE 27TH. THE
NATIONAL WEATHER SERVICE OFFICE IN LEAGUE CITY WAS THE ONLY OTHER
CLIMATE SITE TO RECORD MORE THAN 6 INCHES OF RAINFALL FOR THE
MONTH...ALTHOUGH THERE WERE NO DAILY TOTALS ABOVE 1.78 INCHES AT THE
SITE.

THE FOLLOWING TABLE ILLUSTRATES HOW SOUTHEAST TEXAS HAS GONE FROM A
DRYING TREND OVER THE FIRST THREE MONTHS OF THE YEAR TO A WETTER
TREND IN APRIL. PLEASE NOTE THE HIGHER DEPARTURES BELOW NORMAL FOR
THE MONTH OF MARCH FOR MOST OF THE FIRST AND SECOND-ORDER CLIMATE
SITES.


CLIMATE      JANUARY        FEBRUARY        MARCH          APRIL
 SITE       RAIN   DEP     RAIN   DEP     RAIN   DEP     RAIN   DEP

HOUSTON     3.21  -0.17    1.32  -1.88    0.89  -2.52    2.88  -0.43
CLL         5.06  +1.82    1.10  -1.75    1.73  -1.44    1.65  -1.01
GALVESTON   7.18  +2.98    2.24  -0.33    0.72  -2.44    3.46  +0.41
HOBBY ARPT  3.13  -0.74    1.63  -1.58    1.18  -2.02    9.56  +6.31
CONROE      4.84  +1.06    4.47  +1.21    1.59  -1.60    2.53  -0.14
HUNTSVILLE  3.70  -0.12    1.22  -1.84    2.65  -0.76    2.35  -0.62
DW HOOKS    5.68  +2.13    2.42  -0.61    0.63  -2.96    3.18  -0.21
SUGAR LAND  3.51  -0.09    1.32  -1.90    1.37  -1.88    9.48  +6.16
ANGLETON    2.64  -1.81    1.31  -1.63    0.24  -3.23    2.94  +0.41
PALACIOS    2.67  -0.70    1.64  -0.71    TRACE -3.00    3.35  -1.0
PEARLAND    4.40  +0.18    2.10  -1.08    0.56  -2.47    4.89  +1.37
NWS HGX     5.37  +0.90    1.22  -1.84    2.65  -0.76    2.35  -0.62


OF INTEREST IS THE HEAVY RAINFALL EVENT THAT OCCURRED ON THE 27TH OF
APRIL AT BOTH HOBBY AIRPORT AND SUGAR LAND. RELIABLE RECORDS AT
HOBBY AIRPORT HAVE BEEN KEPT SINCE 1947 ALTHOUGH THERE ARE SOME
ADDITIONAL RECORDS FROM 1941 TO 1946. DAILY RAINFALL OF MORE THAN 5
INCHES HAS NEVER BEEN RECORDED AT HOBBY AIRPORT FOR JANUARY...
FEBRUARY...OR MARCH. THE AIRPORT HAS REPORTED RAINFALL OF MORE
THAN 6 INCHES ON TWO DATES IN APRIL...COINCIDENTALLY BOTH ON
THE 27TH OF APRIL IN 1972 AND 2013.

FOR THE SUGAR LAND SITE...RECORDS THAT HAVE ONLY BEEN KEPT SINCE
SEPTEMBER OF 2000 HAVE NOT ALWAYS BEEN RELIABLE. RAINFALL AMOUNTS
GREATER THAN 6 INCHES HAS NEVER BEEN RECORDED IN JANUARY THROUGH
MARCH AT THE SUGAR LAND AIRPORT...WHILE APRIL HAS ONLY RECORDED MORE
THAN 6 INCHES ON THE 27TH OF APRIL IN 2013. THE PREVIOUS DATE WHICH
RECORDED MORE THAN 6 INCHES OF RAINFALL WAS SEPTEMBER 13TH OF 2008
AT HOBBY AND 6.10 INCHES ON JULY 7TH OF 2010 AT SUGAR LAND.

NOW FOR THE GENERAL MONTHLY CLIMATE DATA. THE FOLLOWING TABLE LISTS
THE MONTHLY CLIMATE DATA FOR THE FIRST AND SECOND-ORDER CLIMATE SITES
IN THE NWS HOUSTON/GALVESTON COUNTY WARNING AREA FOR THE MONTH OF
APRIL.


SITE      AVG       AVG       AVG        DEP      RAIN       DEP
          HIGH      LOW       MONTH

IAH       77.0      56.2      66.6      -2.9      2.88      -0.43
GLS       73.6      62.1      67.8      -2.3      3.46      +0.41
CLL       77.2      55.6      66.4      -2.1      1.65      -1.01
HOU       76.0      57.6      66.8      -3.0      9.56      +6.31
CXO       76.5      52.2      64.3      -2.6      2.53      -0.14
UTS       76.5      54.1      65.3      -2.7      2.35      -0.62
DWH       77.6      55.1      66.3      -1.6      3.18      -0.21
SGR       76.8      56.6      66.7      -2.1      9.48      +6.16
LBX       75.0      55.8      65.4      -3.3      2.94      +0.41
PSX       78.1      59.7      68.9      -1.0      3.35      +0.75
LVJ       74.8      56.4      65.6      -3.4      4.89      +1.37
HGX       74.9      56.3      65.6      -2.1      6.27      +2.96


A MORE COMPLETE CLIMATE SUMMARY FOR APRIL 2013 WILL BE ISSUED BY
MAY 10TH. AT THAT TIME...TEMPERATURES AND RAINFALL FOR THE CO-OP
OBSERVERS WILL BE INCLUDED.

$$

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