Climatological Report (Monthly)
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107
CXUS53 KGRR 012332
CLMJXN

CLIMATE REPORT...WITH NARRATIVE
NATIONAL WEATHER SERVICE GRAND RAPIDS, MI
631 PM EST WED FEB 1 2017

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

...THE JACKSON MI CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2017...

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            59   01/21        MM      MM       51  01/31
LOWEST              1   01/07        MM      MM        4  01/19
                                                          01/18
AVG. MAXIMUM     35.9              30.8     5.1     32.5
AVG. MINIMUM     23.8              16.4     7.4     19.7
MEAN             29.9              23.6     6.3     26.1
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     11              17.5    -6.5       16
DAYS MIN <= 32     23              28.3    -5.3       28
DAYS MIN <= 0       0               3.6    -3.6        0

PRECIPITATION (INCHES)
TOTALS           2.48              1.49    0.99     0.72
DAILY AVG.       0.08              0.05    0.03     0.02
DAYS >= .01        12              12.7    -0.7        8
DAYS >= .10         6               4.1     1.9        3
DAYS >= .50         1               0.5     0.5        0
DAYS >= 1.00        0               0.1    -0.1        0
GREATEST
 24 HR. TOTAL    1.02   01/11 TO 01/12

DEGREE_DAYS
HEATING TOTAL    1081              1283    -202     1200
 SINCE 7/1       3216              3831    -615     3093
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.0
RESULTANT WIND SPEED/DIRECTION   4/244
HIGHEST WIND SPEED/DIRECTION    36/270    DATE  01/10
HIGHEST GUST SPEED/DIRECTION    55/260    DATE  01/10

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            3
NUMBER OF DAYS PC              7
NUMBER OF DAYS CLOUDY         21

AVERAGE RH (PERCENT)     80

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       5
LIGHT RAIN               13     FREEZING RAIN              1
LT FREEZING RAIN          3     HAIL                       0
HEAVY SNOW                1     SNOW                       4
LIGHT SNOW               12     SLEET                      0
FOG                      25     FOG W/VIS <= 1/4 MILE      5
HAZE                     12

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

&&

JANUARY 2017 FEATURED WELL ABOVE NORMAL TEMPERATURES, BELOW NORMAL
SNOWFALL, AND ABOVE NORMAL PRECIPITATION THAT OFTEN CAME IN THE FORM
OF RAIN. SOME PERIODS OF WINTRY MIX WERE ALSO NOTED.

A BRIEF BOUT OF WINTER WAS FEATURED FROM THE 4TH THROUGH THE 9TH
WITH GENERALLY LIGHT LAKE EFFECT SNOW AS WELL AS WET SNOW ASSOCIATED
WITH A WARM PUSH OF AIR INTO THE REGION. FAIRLY SIGNIFICANT RAINFALL
FOLLOWED THIS SNOW AND THAT PUSHED RIVERS HIGHER ACROSS THE AREA.
THIS HELPED BREAK UP ICE ON THE RIVERS AND LED TO SOME MINOR ICE
JAMS ON THE GRAND RIVER. IN ADDITION, AS THE WARM AIR SURGED IN ON
THE 10TH, VERY STRONG WIND GUSTS WERE REPORTED ACROSS THE REGION.
MOST GUSTS WERE IN THE 35 TO 55 MPH RANGE. THUNDERSTORMS WERE
REPORTED ACROSS SOUTHERN LOWER MICHIGAN ON THE 11TH.

ANOTHER ROUND OF SIGNIFICANT RAINFALL STRUCK THE REGION DURING THE
MIDDLE OF THE MONTH, PRODUCING A HALF INCH TO ONE INCH IN GENERAL.
THIS LED TO HIGH RIVER LEVELS, BUT NO SIGNIFICANT FLOODING.
THUNDERSTORMS WERE REPORTED ONCE AGAIN ACROSS SOUTHERN LOWER
MICHIGAN ON THE 17TH. A DRAMATIC WARM UP OCCURRED ON THE 21ST, WITH
SOME LOCATIONS BREAKING OUT INTO THE 60S, LEADING TO ONE OF THE
WARMEST JANUARY DAYS IN YEARS.

A CLIPPER SYSTEM PRODUCED GENERALLY 2" TO 5" OF SNOW ACROSS CENTRAL
AND SOUTHERN LOWER MICHIGAN ON THE 30TH AND 31ST. WHILE THIS WOULD
NORMALLY BE A COMMON OCCURRENCE IN JANUARY, IT ENDED UP BEING THE
EXCEPTION TO THE RULE.

TEMPERATURES AVERAGED WELL ABOVE NORMAL, WITH MOST LOCATIONS AROUND
5 DEGREES ABOVE THE TYPICAL MONTHLY AVERAGE TEMPERATURES. WHILE NOT
TOP TEN WARMTH, IT WAS CLOSE FOR GRAND RAPIDS, LANSING, AND
MUSKEGON. IRONICALLY, THIS JANUARY WAS MUCH WARMER THAN JANUARY 2016
DURING THE STRONG EL NINO PATTERN.

$$

CAS/HOVING



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