Climatological Report (Monthly)
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542
CXUS52 KKEY 011613
CLMMTH


CLIMATE REPORT
NATIONAL WEATHER SERVICE KEY WEST, FL
1212 PM EDT SUN OCT 1 2017

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

...THE MARATHON CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
HIGHEST            93   09/25                         93  09/24
                        09/08
                        09/07
LOWEST             74   09/29                         71  09/27
AVG. MAXIMUM     89.8              89.4     0.4     90.3
AVG. MINIMUM     79.6              78.5     1.1     78.9
MEAN             84.7              83.9     0.8     84.6
DAYS MAX >= 90     18              12.7     5.3       25
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
TOTALS           3.53              7.73   -4.20     3.78
DAILY AVG.       0.12              0.26   -0.14     0.13
DAYS >= .01         9                                 13
DAYS >= .10         3                                  6
DAYS >= .50         2                                  2
DAYS >= 1.00        2                                  2

SNOWFALL (INCHES)
TOTALS            0.0               0.0      0.0     0.0
SINCE 7/1         0.0               0.0      0.0     0.0
SNOWDEPTH AVG.      0               0.0      0.0       0
DAYS >= 1.0         0               0.0      0.0       0
GREATEST
 SNOW DEPTH         0                                  0
 24 HR TOTAL      0.0   09/30 TO 09/30

DEGREE_DAYS
HEATING TOTAL       0                 0       0        0
 SINCE 7/1          0                 0       0        0
COOLING TOTAL     559               568      -9      597
 SINCE 1/1       4506              3954     552     4077
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.3
HIGHEST WIND SPEED/DIRECTION    54/050    DATE  09/09
HIGHEST GUST SPEED/DIRECTION    72/060    DATE  09/09

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.20
NUMBER OF DAYS FAIR           26
NUMBER OF DAYS PC              2
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              6     MIXED PRECIP               0
HEAVY RAIN                7     RAIN                       4
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      0
HAZE                      7

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

$$

HURRICANE IRMA MADE LANDFALL ON CUDJOE KEY, IN THE LOWER KEYS, AT
910 AM EDT SUNDAY, SEPTEMBER 10TH, 2017.A WIND GUST OF 120 MPH WAS
RECORDED BY A RAWS SITE ON BIG PINE KEY, AROUND 938 AM EDT. THE
HIGHEST WIND GUST RECORDED AT THE MARATHON INTERNATIONAL AIRPORT
DURING THIS EVENT WAS 72 MPH AT 745 PM EDT ON SEPTEMBER 9TH, 2017.
THE ASOS WENT OFFLINE SHORTLY THEREAFTER, THUS MISSING WIND DATA
FROM THE PEAK OF THE STORM.

MONTH-TO-DATE AND ANNUAL RAINFALL TOTALS ARE MISSING DATA. THIS
INCLUDES SIGNIFICANT RAINFALL FROM SEPTEMBER 10TH, DUE TO THE
ABOVE-MENTIONED ASOS OUTAGE RELATED TO HURRICANE IRMA.

ROSS




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