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696
CXUS53 KGRR 011718
CLMJXN

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
1258 PM EDT WED OCT 1 2014

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

...THE JACKSON MI CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1944 TO 9999

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
HIGHEST            93   09/05        MM      MM       91  09/10
LOWEST             37   09/17        MM      MM       37  09/24
                                                          09/17
AVG. MAXIMUM     72.8              72.7     0.1     72.5
AVG. MINIMUM     49.0              50.9    -1.9     50.6
MEAN             60.9              61.8    -0.9     61.6
DAYS MAX >= 90      1               0.4     0.6        1
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.2    -0.2        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
TOTALS           2.10              3.48   -1.38     2.55
DAILY AVG.       0.07              0.12   -0.05     0.09
DAYS >= .01        11               9.6     1.4       10
DAYS >= .10         5               6.4    -1.4        5
DAYS >= .50         1               2.5    -1.5        2
DAYS >= 1.00        0               0.8    -0.8        0
GREATEST
 24 HR. TOTAL    0.73   09/10 TO 09/10           09/09 TO 09/09

DEGREE_DAYS
HEATING TOTAL     163               153      10      160
 SINCE 7/1        205               188      17      208
COOLING TOTAL      50                57      -7       64
 SINCE 1/1        496               586     -90      604
..................................................

WIND (MPH)
AVERAGE WIND SPEED              4.8
RESULTANT WIND SPEED/DIRECTION   1/201
HIGHEST WIND SPEED/DIRECTION    26/280    DATE  09/05
HIGHEST GUST SPEED/DIRECTION    39/260    DATE  09/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     71

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       4
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      22     FOG W/VIS <= 1/4 MILE      5
HAZE                      0

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

&&

SEPTEMBER 2014 WAS OVERALL COOLER AND DRIER THAN NORMAL IN SOUTHWEST
LOWER MICHIGAN. TEMPERATURES ENDED UP ABOUT A DEGREE BELOW NORMAL
AND PRECIPITATION ABOUT AN INCH BELOW NORMAL IN MANY LOCATIONS.

THE MONTH STARTED OUT ON THE WARM AND HUMID SIDE... WITH OCCASIONAL
ROUNDS OF THUNDERSTORMS DURING THE FIRST WEEK. SEPTEMBER 5TH WAS THE
HOTTEST DAY FOR MOST AREAS AS TEMPERATURES HIT OR EXCEEDED THE 90
DEGREE MARK IN KALAMAZOO... BATTLE CREEK AND JACKSON. LANSING TOPPED
OUT AT 89 AND GRAND RAPIDS STAYED AT 84... WHICH SECURED THE
REMARKABLE STATISTIC OF NO 90 DEGREE DAYS IN 2014 AT BOTH CITIES.

A SIGNIFICANT COOL DOWN OCCURRED IN THE MIDDLE OF THE MONTH. HIGHS
FAILED TO REACH 60 DEGREES THROUGHOUT THE AREA ON SEPTEMBER 12TH.
MUSKEGON ALSO SET A RECORD FOR COLDEST HIGH TEMPERATURE ON THE 12TH
WITH A HIGH OF 57. AS SKIES CLEARED TOWARD THE LATER PORTION OF THE
COLD STRETCH... A FEW NIGHTS OF PATCHY TO WIDESPREAD FROST OCCURRED
IN NORTHERN AND CENTRAL LOWER MICHIGAN.

A WEEKLONG STRETCH OF WARM AND SUNNY WEATHER ROUNDED OUT THE LATTER
PART OF THE MONTH... WITH HIGHS CONSISTENTLY IN THE 70S AND LOWS
AROUND 50. VERY LITTLE PRECIPITATION FELL DURING THIS PERIOD...
WHICH KEPT THE MONTHLY PRECIPITATION AT ABOUT 75 PERCENT OF NORMAL
FOR MOST LOCATIONS. A COLD FRONT ON THE 29TH BROUGHT LIGHT RAIN
FOLLOWED BY MUCH COOLER AIR FOR THE FINAL DAY OF SEPTEMBER.

THERE WAS ONE DAY OF WIDESPREAD SEVERE WEATHER IN SOUTHWEST LOWER
MICHIGAN. A LINE OF STORMS ON THE EVENING OF SEPTEMBER 5TH PRODUCED
WIND DAMAGE AND NUMEROUS POWER OUTAGES SPANNING FROM WEST OF
KALAMAZOO TO EAST OF JACKSON. MANY TREES FELL IN KALAMAZOO AND IN
THE BATTLE CREEK AREA... AND THE AIRPORTS IN KALAMAZOO AND BATTLE
CREEK MEASURED RESPECTIVE WIND GUSTS OF 56 AND 60 MPH.

$$

CAS 63







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