Climatological Report (Monthly)
Issued by NWS

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CXUS53 KGRR 011931 RRA
CLMJXN

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
331 PM EDT TUE SEP 1 2015

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

...THE JACKSON MI CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2015...

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            88   08/02        MM      MM       89  08/25
LOWEST             48   08/27        MM      MM       44  08/15
AVG. MAXIMUM     77.8              80.1    -2.3     80.5
AVG. MINIMUM     58.6              59.0    -0.4     59.5
MEAN             68.2              69.5    -1.3     70.0
DAYS MAX >= 90      0               1.7    -1.7        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)
TOTALS           3.23              3.47   -0.24     2.78
DAILY AVG.       0.10              0.11   -0.01     0.09
DAYS >= .01        12               9.5     2.5        9
DAYS >= .10         6               6.3    -0.3        5
DAYS >= .50         2               2.5    -0.5        2
DAYS >= 1.00        1               1.0     0.0        1
GREATEST
 24 HR. TOTAL    1.29   08/14 TO 08/15

DEGREE_DAYS
HEATING TOTAL      25                24       1       12
 SINCE 7/1         38                35       3       42
COOLING TOTAL     132               164     -32      173
 SINCE 1/1        426               529    -103      446
..................................................

WIND (MPH)
AVERAGE WIND SPEED              6.5
RESULTANT WIND SPEED/DIRECTION   3/233
HIGHEST WIND SPEED/DIRECTION    36/330    DATE  08/14
HIGHEST GUST SPEED/DIRECTION    48/330    DATE  08/14

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           19
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     77

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       5
LIGHT RAIN               13     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      18     FOG W/VIS <= 1/4 MILE      3
HAZE                      3

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

&&

TEMPERATURES IN AUGUST 2015 WERE NEAR TO SLIGHTLY BELOW NORMAL. AS
IS OFTEN THE CASE DURING SUMMER MONTHS...RAINFALL DUE TO
THUNDERSTORMS VARIED SIGNIFICANTLY BY LOCATION. LANSING RECORDED ITS
THIRD WETTEST AUGUST WITH 6.82 INCHES. RECORDS GO BACK TO 1863.
LANSING ALSO RECORDED ITS WETTEST AUGUST DAY WITH 3.77 INCHES ON
AUGUST 10...BREAKING THE OLD RECORD OF 3.39 INCHES SET ON AUGUST 27
2013. AUGUST 10 2015 IS NOW THE 6TH WETTEST CALENDAR DAY ON RECORD
AT LANSING.

TEMPERATURES WERE NEAR NORMAL TO A LITTLE ON THE COOL SIDE OF NORMAL
DURING AUGUST 2015. HIGHS IN THE UPPER 70S AND 80S WERE COMMON IN
THE EARLY AND MIDDLE PARTS OF THE MONTH...WITH A COOL DOWN DURING
THE LAST WEEK OF THE MONTH WITH HIGHS IN THE 60S FOR A FEW DAYS.
MOST LOCATIONS REACHED 90 DEGREES ONE TIME. MUSKEGON AND JACKSON DID
NOT HAVE A 90 DEGREE DAY.

AUGUST GOT OFF TO A QUICK START WITH ACTIVE WEATHER AS A LINE OF
STRONG TO SEVERE THUNDERSTORMS MOVED SOUTH THROUGH LOWER MICHIGAN
DURING THE EVENING HOURS OF AUGUST 2ND 2015. THOUGH THE STORMS
PRODUCED DESTRUCTIVE WINDS AND BASEBALL SIZE HAIL IN NORTHERN LOWER
MICHIGAN...THE MAIN EFFECTS OF THESE STORMS IN CENTRAL TO SOUTHERN
MICHIGAN WERE 40-50 MPH WINDS WITH SOME LOCALLY HIGHER GUSTS.
LOCALLY HEAVY RAINFALL...SMALL HAIL...AND VERY FREQUENT LIGHTNING
WERE ALSO COMMON. RESULTING IMPACTS INCLUDED SOME POWER OUTAGES AND
BROKEN TREE BRANCHES AS WELL AS A FEW TREES THAT CAME DOWN AND
CAUSED DAMAGE.

PERIODS OF RAIN WITH SCATTERED THUNDERSTORMS RETURNED TO THE AREA ON
MONDAY AUGUST 10. GRAND RAPIDS RECEIVED 1.22 INCHES...BUT MANY
LOCATIONS DID NOT RECEIVE SIGNIFICANT AMOUNTS OF RAIN.
HOWEVER...STORMS WITH OVER 1 INCH PER HOUR RAINFALL RATES PERSISTED
NEAR ROCKFORD AND LANSING...LEADING TO HIGHER TOTALS. AREAS BETWEEN
PORTLAND AND LANSING RECEIVED 2.5 TO 4.5 INCHES. MODERATE STREET
FLOODING AND PONDING OF WATER WAS COMMON IN LANSING. ROADS IN SOME
LOW SPOTS HAD WATER LEVELS APPROACHING THE ROOFS OF CARS. US-127
NEAR SAGINAW HWY WAS SHUT DOWN FOR HOURS DUE TO DEEP FLOODWATERS AND
CLOGGED STORM DRAINS.

$$

EBW/CAS


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