Climatological Report (Daily)
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CDUS45 KRIW 210729
CLIP60


CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
129 AM MDT THU SEP 21 2017


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

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR SEPTEMBER 20 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         41        MM  69    2016  60    -19       69
                                      2012
  MINIMUM         28        MM  20    2000  30     -2       36
  AVERAGE         35                        45    -10       53

PRECIPITATION (IN)
  YESTERDAY        0.15R         0.13 2008   0.05   0.10     0.00
  MONTH TO DATE    3.25                      0.97   2.28     0.99
  SINCE SEP 1      3.25                      0.97   2.28     0.99
  SINCE JAN 1     25.55                     15.04  10.51    12.22

DEGREE DAYS
 HEATING
  YESTERDAY       30                        20     10       12
  MONTH TO DATE  318                       328    -10      370
  SINCE SEP 1    318                       328    -10      370
  SINCE JUL 1    871                       915    -44      953

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE SEP 1      0                         0      0        0
  SINCE JAN 1      0                         0      0        0
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED     8   HIGHEST WIND DIRECTION     W (260)
  HIGHEST GUST SPEED    18   HIGHEST GUST DIRECTION     E (99)
  AVERAGE WIND SPEED     4.8


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.0


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100          1200 AM
 LOWEST     70          1200 PM
 AVERAGE    85

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


THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   60        69      2012
                                             2001
 MINIMUM TEMPERATURE (F)   30        22      2004


SUNRISE AND SUNSET
SEPTEMBER 21 2017.....SUNRISE   708 AM MDT   SUNSET   720 PM MDT
SEPTEMBER 22 2017.....SUNRISE   709 AM MDT   SUNSET   718 PM MDT


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




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