Climatological Report (Monthly)
Issued by NWS Sterling, VA

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CXUS51 KLWX 040228
CLMBWI

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1028 PM EDT SUN JUN 3 2018

...................................

...THE BALTIMORE MD CLIMATE SUMMARY FOR THE MONTH OF MAY 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              98   05/30/2011
                        05/30/1991
                        05/19/1962
 LOW               32   05/11/1966
HIGHEST            92   05/03        90       2
LOWEST             42   05/01        39       3
AVG. MAXIMUM     79.5              73.9     5.6     72.2
AVG. MINIMUM     59.7              52.0     7.7     52.5
MEAN             69.6              62.9     6.7
DAYS MAX >= 90      5               1.2     3.8
DAYS MAX <= 32      0               0.0     0.0
DAYS MIN <= 32      0               0.0     0.0
DAYS MIN <= 0       0               0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.71   1989
 MINIMUM         0.37   1986
TOTALS           8.17              3.99    4.18     5.64
DAILY AVG.       0.26              0.13    0.13
DAYS >= .01        15              11.4     3.6
DAYS >= .10        10               6.9     3.1
DAYS >= .50         7               2.8     4.2
DAYS >= 1.00        4               1.0     3.0
GREATEST
 24 HR. TOTAL    1.63   05/15 TO 05/15

DEGREE_DAYS
HEATING TOTAL      18               134    -116      131
 SINCE 7/1       4493              4749    -256     3851
COOLING TOTAL     167                70      97       59
 SINCE 1/1        189                84     105      108
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.5
HIGHEST WIND SPEED/DIRECTION    30/020    DATE  05/12
HIGHEST GUST SPEED/DIRECTION    47/020    DATE  05/12

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            4
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY         15

AVERAGE RH (PERCENT)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH


THUNDERSTORM              M     MIXED PRECIP               0
HEAVY RAIN                M     RAIN                      10
LIGHT RAIN                M     FREEZING RAIN              0
LT FREEZING RAIN          M     HAIL                       0
HEAVY SNOW                M     SNOW                       0
LIGHT SNOW                M     SLEET                      0
FOG                       M     FOG W/VIS <= 1/4 MILE      2
HAZE                      M

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

BALTIMORE MD...BALTIMORE-WASHINGTON INTERNATIONAL THURGOOD
MARSHALL AIRPORT...

...5TH WARMEST MAY ON RECORD IN BALTIMORE MD...
...3RD WETTEST MAY ON RECORD IN BALTIMORE MD...

THE MONTHLY AVERAGE TEMPERATURE WAS WELL ABOVE NORMAL AND RANKS AS
THE 5TH WARMEST ON RECORD. IT WAS THE WARMEST MAY SINCE 2004 WHEN
THE AVERAGE TEMPERATURE WAS 69.8 DEGREES.

MONTHLY PRECIPITATION WAS 204 PRECENT OF NORMAL AND RANKS AS THE 3RD
WETTEST ON RECORD. IT WAS THE WETTEST MAY SINCE 2009 WHEN 8.42
INCHES OF PRECIPITATION FELL.

A DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 90 DEGREES WAS SET ON
MAY 2ND. THIS BROKE THE OLD RECORD OF 88 DEGREES SET IN 1951.

A DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 92 DEGREES WAS SET ON
MAY 3RD. THIS BROKE THE OLD RECORD OF 91 DEGREES SET IN 1913.

A DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 91 DEGREES WAS SET ON
MAY 4TH. THIS BROKE THE OLD RECORD OF 90 DEGREES SET IN 2001.

CLIMATE RECORDS FOR THE BALTIMORE MD AREA HAVE BEEN KEPT AT
BALTIMORE-WASHINGTON INTERNATIONAL THURGOOD MARSHALL AIRPORT SINCE
1950. ADDITIONAL TEMPERATURE RECORDS OBSERVED DOWNTOWN EXTEND BACK
TO JULY OF 1872. PRECIPITATION RECORDS EXTEND BACK TO JANUARY OF
1871. SNOWFALL RECORDS BEGAN IN MARCH OF 1892.

ALL CLIMATE DATA ARE CONSIDERED PRELIMINARY UNTIL REVIEWED BY THE
NATIONAL CENTERS FOR ENVIRONMENTAL INFORMATION (NCEI).

$$


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