Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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CXUS51 KBUF 052153
CLMBUF

CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
1253 PM EDT SUN OCT 1 2017

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

...THE BUFFALO NY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              98   09/03/1953
 LOW               32   09/30/1991
                        09/24/1963
                        09/28/1957
HIGHEST            91   09/25                         88  09/10
LOWEST             42   09/30                         43  09/25
AVG. MAXIMUM     75.3              71.1     4.2     76.3
AVG. MINIMUM     55.5              53.4     2.1     57.6
MEAN             65.4              62.2     3.2     67.0
DAYS MAX >= 90      2               0.1     1.9        0
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)
RECORD
 MAXIMUM         8.99   1977
 MINIMUM         0.31   1897
TOTALS           3.17              3.90   -0.73     3.53
DAYS >= .01         9                                  7
DAYS >= .10         6                                  4
DAYS >= .50         3                                  2
DAYS >= 1.00        1                                  1
GREATEST
 24 HR. TOTAL    1.07   09/07 TO 09/07           09/17 TO 09/17
                                                          09/30 TO 09/30
                                                          09/30 TO 09/30

SNOWFALL (INCHES)
RECORDS
 TOTAL              T   1956
                        1950
TOTALS            0.0               0.0     0.0      0.0
SINCE 7/1         0.0               0.0     0.0
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL      0.0   09/30 TO 09/30

DEGREE_DAYS
HEATING TOTAL      93               135     -42       44
 SINCE 7/1        109               162     -53       44
COOLING TOTAL     116                53      63      109
 SINCE 1/1        586               540      46      927
.................................................

WIND (MPH)
AVERAGE WIND SPEED              6.6
HIGHEST WIND SPEED/DIRECTION    31/220
HIGHEST GUST SPEED/DIRECTION    41/220    DATE  09/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
NUMBER OF DAYS FAIR            9
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     72

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       4
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      0
HAZE                      2

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

&&

...TWO HALVES OF SEPTEMBER...

SEPTEMBER FEATURED A COOL AND WET START TO THE MONTH, FOLLOWED BY A
DRY AND EVENTUALLY HOT FINISH TO THE MONTH. A HEAT WAVE THE LAST
WEEK OF THE MONTH FEATURED THE LATEST CONSECUTIVE DAYS REACHING 90F.

THE TEMPERATURE FOR THE MONTH AVERAGED 65.4F WHICH IS 3.2 DEGREES
ABOVE NORMAL. HOWEVER THE MONTH CAN BE BROKEN DOWN INTO TWO DISTINCT
WEATHER REGIMES...A COOL FIRST 11 DAYS, AND A VERY WARM REMAINING 19
DAYS OF THE MONTH. THE FIRST 11 DAYS AVERAGED 59.8F, WHILE THE LAST
19 DAYS AVERAGED ABOUT 10 DEGREES WARMER AT 69.2F. THERE WERE 4
RECORDS ESTABLISHED, INCLUDING THE FIRST RECORD LOW TEMPERATURE
SINCE MARCH OF 2015. RECORDS INCLUDE A RECORD LOW OF 43F/2ND, AND
RECORD HIGHS OF 90F/24TH, 91F/25TH AND 88F/26TH. THE THREE RECORD
HIGHS WERE THE FIRST THREE CONSECUTIVE RECORD HIGHS SINCE MARCH OF
2012 WHEN THERE WERE 6 CONSECUTIVE RECORD HIGHS (17TH - 22ND). THE
12 CONSECUTIVE DAYS AT 80F OR GREATER (16TH - 27TH) WAS THE LATEST
CONSECUTIVE STRETCH OF THIS MANY DAYS THIS LATE IN THE SUMMER
SEASON. THE 15 DAYS OF 80F OR GREATER TEMPERATURES IS THIRD GREATEST
FOR THE MONTH OF SEPTEMBER.

PRECIPITATION TOTALED 3.17 INCHES THIS MONTH, WHICH IS ABOUT THREE
QUARTERS OF AN INCH BELOW NORMAL. THE BULK OF THIS PRECIPITATION
OCCURRED THE FIRST WEEK, INCLUDING THIS MONTHS GREATEST DAILY
RAINFALL TOTAL OF 1.07 INCHES ON THE 7TH IN PRIMARILY LAKE EFFECT
RAIN BANDS. THE STRETCH OF 18 CONSECUTIVE DAYS WITHOUT MEASURABLE
RAINFALL (9TH TO 26TH) WAS TIED FOR THE 15TH LONGEST, AND WAS THE
SECOND LONGEST STRETCH ENTIRELY IN THE MONTH OF SEPTEMBER (19
DAYS/1917).

HIGH PRESSURE STARTED THE MONTH WITH FAIR WEATHER ACROSS WESTERN NEW
YORK. THE REMNANTS OF HURRICANE HARVEY PASSED BY THE REGION ON THE
2ND AND 3RD WITH MINOR RAINFALL AMOUNTS. FOLLOWING ONE MILD
AFTERNOON ON THE 4TH, A LINE OF THUNDERSTORMS CROSSED THE REGION
THAT EVENING, WITH STRONG WINDS FELLING TREES ACROSS THE SOUTHERN
TIER AND TOWARDS THE FINGER LAKES REGION. COOLER AIR THEN SETTLED
INTO WESTERN NEW YORK FROM THE 5TH THROUGH THE 11TH. A DISTINCT
PATTERN CHANGE THEN OCCURRED MID-MONTH, WITH TEMPERATURES SOARING TO
80F ON THE 12TH. RAIN FROM HURRICANE IRMA REMAINED JUST SOUTH AND
EAST OF THE REGION ON THE 12TH AND 13TH, ALLOWING FOR A PROLONGED
STRETCH OF DRY WEATHER. THE DRY GROUND, COUPLED WITH HEAT BROUGHT
NORTHWARD FROM TROPICAL ACTIVITY BUILT A STRONG HIGH PRESSURE OVER
THE EASTERN US, SUCH THAT AIR TEMPERATURES REACHED 90F ON THE 24TH
AND 25TH. THIS HEAT AND DRY WEATHER DELAYED THE TURNING OF FALL
FOLIAGE WITH MANY TREES STILL GREEN TO FINISH THE MONTH. THE FINAL
TWO DAYS OF THE MONTH ENDED BELOW NORMAL WITH RAIN BOTH DAYS.

LAKE ERIE DIPPED INTO THE UPPER 60S EARLY IN THE MONTH, THEN
ACTUALLY WARMED THROUGH THE MONTH, TO A RECORD VALUE OF 72F ON THE
26TH AND 27TH. COOLER AIR THE END OF THE MONTH DROPPED THE LAKE
TEMPERATURE BACK TO 68F AT MONTHS CLOSE. STRONGEST WINDS THIS MONTH
WERE 41 MPH ON AFTERNOON OF THE 4TH. AVERAGE WIND SPEEDS WERE 2 MPH
BELOW NORMAL, FINISHING AT 6.6 MPH.

IN ALL, A COOL START TO MONTH GIVING WAY TO LATE SUMMER`S HEAT.

&&

THOMAS

$$


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