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CXUS53 KDTX 231552 AAA
CLMDTW

CLIMATE REPORT...MONTHLY CLIMATE SUMMARY ADDED
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1011 AM EST FRI FEB 1 2013

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

...THE DETROIT MI CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1874 TO 2013

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              67   01/25/1950
 LOW              -21   01/21/1984
HIGHEST            62   01/30        MM      MM
LOWEST                  01/22        MM      MM
AVG. MAXIMUM     36.6              32.0     4.6
AVG. MINIMUM     20.8              19.1     1.7
MEAN             28.7              25.6     3.1
DAYS MAX >= 90      0               0.0     0.0
DAYS MAX <= 32     12              15.7    -3.7
DAYS MIN <= 32     24              26.7    -2.7
DAYS MIN <= 0       1               2.0    -1.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.02   1932
 MINIMUM         0.23   1961
TOTALS           3.45              1.96    1.49
DAILY AVG.       0.11              0.06    0.05
DAYS >= .01        14              13.1     0.9
DAYS >= .10         7               5.6     1.4
DAYS >= .50         3               0.9     2.1
DAYS >= 1.00        0               0.1    -0.1
GREATEST
 24 HR. TOTAL    0.85   01/13 TO 01/13
 STORM TOTAL       MM
 (MM/DD(HH))            MM

SNOWFALL (INCHES)
RECORDS
 TOTAL           29.6   1978
                        0
                        0
TOTALS           10.0              12.5    -2.5
 LIQUID EQUIV    1.00              1.20   -0.20
SINCE 7/1        21.0              23.7    -2.7
 LIQUID 7/1      2.10
DAYS >= TRACE      15              10.4     4.6
DAYS >= 1.0         4               3.7     0.3
GREATEST
 SNOW DEPTH         6   01/01
 24 HR TOTAL      3.0   01/25 TO 01/25
 STORM TOTAL       MM
 (MM/DD(HH))            MM

DEGREE_DAYS
HEATING TOTAL    1116              1223    -107
 SINCE 7/1       3235              3520    -285
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0

FREEZE DATES
RECORD
 EARLIEST     MM
 LATEST       MM
EARLIEST                        MM
LATEST                          MM
.................................................

WIND (MPH)
AVERAGE WIND SPEED              10.3
HIGHEST WIND SPEED/DIRECTION    43/260    DATE  01/20
HIGHEST GUST SPEED/DIRECTION    55/260    DATE  01/20

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            0
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         20

AVERAGE RH (PERCENT)     71

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       4
LIGHT RAIN                9     FREEZING RAIN              2
LT FREEZING RAIN          2     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW               15     SLEET                      0
FOG                      17     FOG W/VIS <= 1/4 MILE      1
HAZE                      7

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

$$

-------------------------------------------------------------------
CLIMATOLOGICAL STATISTICS FOR THE NWS WHITE LAKE - JANUARY 2013

...TEMPERATURE DATA...               ...PRECIPITATION DATA...
AVERAGE MAXIMUM.... 33.2             MONTHLY TOTAL ..........3.95
AVERAGE MINIMUM.... 15.6             GREATEST DAILY TOTAL....1.09
MONTHLY AVERAGE.... 24.4             ON THE 29TH
                                     2013 TOTAL..............3.95

...HEATING DEGREE DAYS...            ...SNOWFALL DATA...
MONTHLY TOTAL..........1254          MONTHLY TOTAL..........9.50
2012-13 SEASON TOTAL...3828          2012-13 SEASON TOTAL...24.3

...COOLING DEGREE DAYS...
MONTHLY TOTAL.........0
2013 TOTAL............0

=====================================================================
...HIGH VARIABILITY AND NEAR NORMAL SNOWFALL CHARACTERIZES JANUARY
2013...

A HIGH AMPLITUDE AND GENERALLY PROGRESSIVE PATTERN HELPED DRIVE THE
MONTH`S WEATHER TOWARD BOTH WARM AND COLD EXTREMES DURING THE MONTH
OF JANUARY. THE FIRST 13 DAYS OF THE MONTH WERE CHARACTERIZED BY A
GRADUAL REBOUND OF TEMPERATURES FROM DAYTIME HIGHS IN THE MID 20S,
THROUGH THE 30S AND 40S, EVENTUALLY REACHING 59 DEGREES ON THE 12TH.
THIS PROLONGED JANUARY THAW WAS THE RESULT OF A SLOW MOVING CLOSED
LOW OVER THE SOUTHEAST UNITED STATES THAT SLOWLY BUT SURELY FORCED
VERY HIGH AMPLITUDE RIDGING ACROSS SOUTHEAST MICHIGAN. IN THE WAKE
OF THE THAW, MORE CLIMATOLOGICALLY NORMAL NORTHWEST FLOW SETTLED IN
ACROSS THE GREAT LAKES BEFORE A NOTEWORTHY ARCTIC OUTBREAK OCCURRED
DURING THE THIRD WEEK OF THE MONTH. AFTER A BRIEF WARMUP INTO THE
UPPER 40S AHEAD OF THE RESPONSIBLE SYSTEM, THE HIGH AND LOW
TEMPERATURES FOR DETROIT ON JANUARY 22ND REACHED ONLY 12F AND -1F
RESPECTIVELY. FLINT RECORDED AN EQUALLY IMPRESSIVE RANGE OF 10F AND
-1F AS DID SAGINAW, WHICH REGISTERED 8F AND 0F FOR THE DAY. IN
FLINT, THE HIGH OF ONLY 10 DEGREES TIED THE PREVIOUS RECORD MINIMUM
HIGH (1922) FOR THAT DAY. YET ANOTHER OSCILLATION OF THE PATTERN
OCCURRED LATER IN THE MONTH, WHEN THE RETURN OF STRONG RIDGING CAUSED
TEMPERATURES AT ALL THREE SOUTHEAST MICHIGAN CLIMATE SITES TO
SKYROCKET TO NEW RECORDS FOR JANUARY 30TH. DETROIT REACHED A HIGH OF
62 (53 IN 1969), FLINT REACHED 58 (51 IN 1988), AND SAGINAW REACHED
56 (50 IN 1988). ALL CONSIDERED, THE PERIODS OF WARMTH WERE
SUFFICIENT TO PUSH THE DETROIT AREA`S MONTHLY AVERAGE TEMPERATURE TO
28.7 DEGREES, +3.1 DEGREES ABOVE THE 25.6 JANUARY NORMAL.

DESPITE THE DETROIT AREA`S LARGEST SNOWFALL FOR THE MONTH COMING IN
AT ONLY 3.0" ON THE 25TH, THE MONTHLY TOTAL SNOWFALL OF 10.0" WAS
NEAR NORMAL AND ONLY -2.5" BELOW THE 12.5" JANUARY AVERAGE.
LIKEWISE, THE SEASONAL SNOWFALL CURRENTLY STANDS JUST SLIGHTLY BELOW
NORMAL AT 21.0", -2.7" BELOW THE THE 23.7" SEASONAL AVERAGE. IN
ADDITION, MULTIPLE RAINFALLS BETWEEN A QUARTER TO THREE QUARTERS OF
AN INCH DURING THE WARMER PERIODS CONTRIBUTED, TO A MONTHLY
PRECIPITATION TOTAL OF 3.45", MAKING IT THE DETROIT AREA`S 12TH
WETTEST JANUARY ON RECORD. THE GREATEST DAILY RAINFALL FOR THE MONTH
WAS 0.85" ON THE 13TH, OCCURRING JUST TWO DAYS AFTER MEASURING 0.73"
ON THE 11TH.

THE AVERAGE HIGH TEMPERATURE FOR THE DETROIT AREA IN JANUARY WAS
36.6, +4.6 DEGREES ABOVE THE NORMAL VALUE OF 32.0 AND THE 23RD
WARMEST ON RECORD. THE AVERAGE LOW FOR THE MONTH WAS 20.8, +1.7
DEGREES ABOVE THE 19.1 DEGREE NORMAL AND THE 57TH WARMEST ON RECORD.
THE AVERAGE OVERALL TEMPERATURE WAS 28.7, A DEPARTURE OF +3.1
DEGREES ABOVE THE 25.6 DEGREE NORMAL AND THE THE 37TH WARMEST ON
RECORD.