Climatological Report (Monthly)
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
000
CXAK57 PAJK 072019 CCA
CLMAJK

CLIMATE REPORT
NATIONAL WEATHER SERVICE JUNEAU, AK
1109 AM AKST WED FEB 7 2018

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

...THE JUNEAU CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1936 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              60   01/20/1942
 LOW              -22   01/12/1972
HIGHEST            53   01/15        43      10
LOWEST              8   01/28         2       6
AVG. MAXIMUM     33.8              32.8     1.0
AVG. MINIMUM     23.5              23.7    -0.2
MEAN             28.6              28.3     0.3
DAYS MAX >= 90      0               0.0     0.0
DAYS MAX <= 32     15              11.7     3.3
DAYS MIN <= 32     23              22.8     0.2
DAYS MIN <= 0       0               1.0    -1.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        11.98   2015
 MINIMUM         0.94   1969
                        1950
TOTALS           5.70              5.35    0.35
DAILY AVG.       0.18              0.17    0.01
DAYS >= .01        16              20.6    -4.6
DAYS >= .10        10              13.0    -3.0
DAYS >= .50         4               3.1     0.9
DAYS >= 1.00        2               0.8     1.2
GREATEST
 24 HR. TOTAL    1.30   01/04 TO 01/04

SNOWFALL (INCHES)
RECORDS
 TOTAL           75.2   2009
 24 HR TOTAL     19.6   01/14/1966 TO 01/15/1966
 SNOW DEPTH        38   01/20/1966
TOTALS           14.9              27.7   -12.8
SINCE 7/1        41.7              57.2   -15.5
SNOWDEPTH AVG.      1                 5      -4
DAYS >= TRACE      16              10.6     5.4
DAYS >= 1.0         4               6.9    -2.9        2
GREATEST
 SNOW DEPTH         5   01/13
 24 HR TOTAL      4.8   01/12 TO 01/12

DEGREE_DAYS
HEATING TOTAL    1118              1139     -21
 SINCE 7/1       4940              4860      80
COOLING TOTAL       0                 0       0
 SINCE 1/1          0                 0       0

FREEZE DATES
EARLIEST                        10/02
LATEST                          05/06
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              5.8
HIGHEST WIND SPEED/DIRECTION    31/090    DATE  01/28
HIGHEST GUST SPEED/DIRECTION    44/190    DATE  01/03


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       7
LIGHT RAIN               13     FREEZING RAIN              0
LT FREEZING RAIN          2     HAIL                       0
HEAVY SNOW                0     SNOW                       7
LIGHT SNOW               14     SLEET                      1
FOG                      19     FOG W/VIS <= 1/4 MILE      3
HAZE                      0

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

$$
...EXTREME TEMPERATURE VARIABILITY IN JANUARY 2018...

JANUARY OF 2018 WAS PARTICULARLY NOTEWORTHY FOR SOME DRAMATIC
TEMPERATURE SWINGS. MOST LOCATIONS WENT FROM BEING WELL BELOW NORMAL
TO HAVING RECORD WARMTH IN A MATTER OF ONLY 4 DAYS AROUND THE MIDDLE
OF THE MONTH. DURING THIS TIME, PARTS OF SOUTHEAST ALASKA WERE
WARMER THAN KEY WEST FLORIDA. NUMEROUS SITES POSTED DAILY HIGHS IN
THE LOW 60S. THE TEMPERATURE AT ANNETTE ISLAND ROSE TO 66 DEGREES ON
THE 14TH OF THE MONTH, AND METLAKATLA ACHIEVED THE SAME TEMPERATURE
THE FOLLOWING DAY. THE 67 DEGREES RECORDED AT THE KETCHIKAN TIDE
GAUGE ON THE 14TH OF THE MONTH SET AN ALL-TIME RECORD HIGH FOR THE
STATE OF ALASKA FOR THE MONTH OF JANUARY. ANOTHER INTERESTING FACT
ABOUT THESE EXTRORDINARY TEMPERATURES IS THAT, ON MORE THAN ONE
OCCASION, THE DAILY HIGH TEMPERATURE OCCURRED IN THE LATE EVENING OR
DURING THE OVERNIGHT HOURS. IN ALL, 39 RECORD HIGH TEMPERATURES WERE
RECORDED ACROSS THE PANHANDLE BETWEEN THE 14TH AND THE 18TH OF THE
MONTH.

THE MONTH BEGAN WITH A SIGNIFICANT NEW YEAR`S DAY SNOW EVENT FOR
MANY LOCATIONS, WITH HEAVY RAIN PREDOMINANTLY TO THE SOUTH. THE
FOLLOWING DAY, SIGNIFICANTLY WARMER AIR SPREAD NORTH, RESULTING IN
HEAVY RAIN OVER MUCH OF THE NEWLY FALLEN SNOW. TEMPERATURES THEN
FELL WELL BELOW NORMAL AT THE START OF THE SECOND WEEK. A SECOND
SIGNIFICANT SNOW EVENT OCCURRED IMMEDIATELY PRIOR TO THE RECORD
WARMTH THAT OCCURRED THROUGH THE MIDDLE OF THE MONTH. ONCE AGAIN,
WARM POST-FRONTAL AIR AND CONTINUING PRECIPITATION WITH THIS SYSTEM
IN THE FORM OF RAIN ASSISTED IN MELTING NEW SNOW. BY THE THIRD WEEK
OF JANUARY, TEMPERATURES BEGAN TO TREND DOWNWARD AS A RESULT OF HIGH
PRESSURE OVER WESTERN CANADA AND LOWER PRESSURES OVER THE GULF OF
ALASKA, LEADING TO STRONG NORTHERLY OUTFLOW WINDS. HIGH WINDS
OCCURRED IN DOWNTOWN JUNEAU AND SKAGWAY WITH STORM FORCE WINDS AND
FREEZING SPRAY OVER LYNN CANAL. THIS PATTERN CONTINUED TO DELIVER
RELATIVELY DRY, COLD, AND WINDY CONDITIONS ACROSS MUCH OF THE
PANHANDLE INTO THE FOURTH AND FINAL WEEK OF THE MONTH.

$$



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.