MONTHLY CLIMATOLOGICAL SUMMARY for DECEMBER 2009

DATA | STATISTICS | GRAPHS | CONDITIONS

CONDITIONS DAY of Month: 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 27 28 29 30 31

                     
NAME: 3270 Nowell   CITY: West Juneau   STATE: Alaska 
ELEV:    97 ft  LAT: 58 17' 33" N  LONG: 134 25' 37" W


TEMPERATURE (F), RAIN  (in), WIND SPEED (mph), SNOW (in). Snowfall from 21:00 - 21:00, all others Midnight to Midnight.

                                      HEAT  COOL        AVG                      WIND       SNOW        
    MEAN                              DEG   DEG         WIND                DOM  RUN        ON(1)       
DAY TEMP  HIGH   TIME   LOW    TIME   DAYS  DAYS  RAIN  SPEED HIGH   TIME   DIR  (mi)  SNOW GRND WEATHER
-----------------------------------------------------------------------------------------------------------------------------------------------------
 1  35.6  37.3  12:00p  34.0  10:40p  29.4   0.0  0.15   1.8  15.0   8:35p  SSE  44.14  0.0  0.0 Cd/LtRnShr Cd Cd/FewSpr-LtMst Cd LtWnd Cd/Sp/Rn-Sn/R
 2  37.5  38.6   4:30p  35.0  12:05a  27.5   0.0  0.72   3.6  18.0   6:15a  SSE  86.79  0.0  0.0 Cldy/Rain-Lt-VryLtRn Lt-BrzyWind 
 3  34.7  36.8   1:50p  33.4   7:25a  30.3   0.0  0.03   0.1   6.0  12:35p  WSW   1.44  0.0  0.0 Brks-VarLwrFog MCd Cd Cd/PeriodsVryLtR-Mst-Sp-R/R-Sn
 4  30.0  34.3  12:05a  25.4  11:35p  35.0   0.0  0.00   0.6   7.0   5:15p    W  13.73 TRACE 0.0 DecrCd PCd MClr VarFog PCd MClr Clr Cd ThnshCds-Brks
 5  27.0  34.7   2:20p  23.5   4:30a  38.0   0.0  0.00   1.5  16.0   6:45p    W  36.47  0.0  0.0 Clr Frst PCd Thnsh-Thn-VryThnCds PCd MClr Clr Lt-Brz
 6  22.9  27.0  12:35p  21.0   7:50p  42.1   0.0  0.00   0.5   7.0   3:50p    W  12.35  0.0  0.0 Clr PCld Thinsh-VryThnCds M/PCd PCd MClr/PCd Clr MCd
 7  27.4  31.8  11:55p  23.2  12:05a  37.6   0.0  0.00   1.0  14.0   9:00a    W  23.18  0.0  0.0 Ovcst M/PCd MClr/PCd VarMClr-MCd/Thnsh-VryThnCds Clr
 8  27.3  32.1  12:20a  24.8   9:35p  37.7   0.0  0.00   0.4   8.0  12:10a    W   9.79  0.0  0.0 Clr-PCd Frst VarVryThn-ThnshCds-FiltBlu-Blu MClr Clr
 9  27.9  29.8   1:15p  26.0   7:20a  37.1   0.0 TRACE   0.1   4.0   4:25a  WSW   1.76 TRACE TRC LoCds-Fog LoCd/VryLt&FrzDrz-XtmFneSn OccHntsBlu-Brks
10  29.7  31.2   2:05p  27.0   3:25a  35.3   0.0 TRACE   0.1   6.0   8:25a  SSE   2.40  0.0  TRC Cld LowClds LowClds/ExtrmLtSpr Cld-LowCds/ThnrAreas
11  29.8  31.6  11:35a  25.7  11:45p  35.2   0.0  0.00   0.4   9.0   8:40p  WSW   9.06  0.0  TRC Cld-LoClds PCld P/MCld MCld Cld/Sm-TnyBrks Cld
12  22.9  26.3  12:25a  19.7   7:45a  42.1   0.0  0.00   0.6   6.0  12:15a    W  14.97  0.0  TRC Cd Clr VarPCd/HiThnVryThnCds ThnshOvcst PCd Cd-Ovcst
13  24.1  28.4   6:30a  20.3   4:55p  40.9   0.0  0.00   0.9  11.0   6:15a  WSW  21.11  0.0  TRC Cd Clr VarMClr-PCd VarPCd-Cd/Thnsh-ThnCds Cd-OccBrks
14  24.8  27.9  11:35a  18.3   9:25p  40.2   0.0 TRACE   0.6   8.0   1:10p  SSE  14.03  0.1  TRC Cld Cld/VryLtSn Cld-FewBrks/OccSnFlurries PCld Clr
15  22.0  25.6   7:10p  16.9   8:10a  43.0   0.0  0.01   0.4   7.0   3:30a  WSW   8.53  0.1  TRC Clr MClr PCd VarP-MCd/VryThn-ThnshCds Brks Cd/VryLtS
16  28.5  32.7   7:50p  25.4  12:05a  36.5   0.0  0.12   0.5  14.0  11:10p  SSE  11.27  2.9  3.0 Cd-LoCds/Sn Cd/OccVryLtSn Cd/Sn-VryLtSn Cd Cd/SnFlur
17  35.5  39.6   3:10p  31.5  12:15a  29.5   0.0  0.25   1.2  23.0   2:10p  SSE  27.41 TRACE  2" Cd/SnFlur Cd/OccVryLtRn-Sn Cd/Lt-VryLtRn-Sp-R OccWnd
18  33.2  40.9   4:20a  24.4  11:40p  31.8   0.0  0.47   1.5  21.0  11:40a  SSE* 36.24  1.3  1.3 Cd/Rn-HvyRn OccWnd Cd-OccBrks/PeriodSnLtSn Cd/SnShrs
19  28.5  30.6  12:45p  25.7  12:05a  36.5   0.0  0.02   0.1   7.0   8:10a  FRZN  2.26  1.3   2" Cld/Sn-LtSn Cld-OccHntsBlu-Brks/PeriodsVryLtSn-Sn Cd
20  21.7  28.7  12:20a  17.7   5:20p  43.3   0.0  0.00   0.8  13.0   7:15p  FRZN 19.79  0.0   2" DecrCds Clr-MClr Thnsh-VryThnCdsMuchofSky MClr Clear
21  18.3  26.6   5:35a  14.8  11:15p  46.7   0.0  0.00   1.6  15.0   5:30a  FRZN 37.55  0.0   2" Clear
22  22.0  29.5  11:35p  14.4   1:30a  43.0   0.0  0.00   0.6  16.0  10:50p  FRZN 13.01  0.0   2" Clear Ovcst-Cld Cld-ThnrSpots Cd-SltHntsBlu Cldy
23  30.5  32.5   9:20p  27.9   6:10a  34.5   0.0  0.15   0.7  11.0   5:10a  SSE  17.32  3.6  5.3 Cldy Cldy/VryLtSn-LtSn-FineSn-Sn Cldy
24  33.7  36.3   8:05p  32.1   5:20a  31.3   0.0  0.53   0.5   9.0   2:20p  SSE  11.48  0.0   3" Cldy Cldy-LoClds/LtMist-Spr-Rn-withLull Cld/Rn-LtRn
25  37.9  40.6   8:50p  35.5  12:10a  27.1   0.0  0.44   1.5  16.0   9:05p  SSE  34.59  0.0  TRC Cloudy/LtRain-VryLtRn-Rn-Spr LtWind
26  37.9  39.8  12:05a  35.5  11:50p  27.1   0.0  0.33   0.4  10.0   4:55p  SSE   8.25  0.0  0.0 Cld/Rn-LtRn-VryLtRn Cld Cld/VryLtRn-Spr Cld-LoClds
27  35.5  36.6  11:10a  34.6   7:35a  29.5   0.0  0.06   0.0   6.0  11:25p    E   0.66  0.0  0.0 Fog-Cldy&HidingMnlnd Cd Cd/XtmLtMst-Sp-VryLtRn-Rn Cd
28  35.3  36.5   1:35p  34.0   8:25a  29.7   0.0  0.00   0.0   7.0  12:30p  SSE   0.72  0.0  0.0 Cld Cld/FogOvhd-LoFog Cld-HntsBlu FogOvhd-LoFog Fog
29  29.8  34.9  12:25a  27.3  11:25p  35.2   0.0  0.00   0.7  11.0   8:50p   **  15.82  0.0  0.0 Fog Clear-VarFog Clr-LowerRibbonFog
30  26.7  33.5   4:20a  22.9  11:55p  38.3   0.0  0.00   7.1  30.0   7:10p  ENE 170.11  0.0  0.0 Clear LtWind-Windy
31  20.1  23.6   1:40a  16.7   8:20a  44.9   0.0  0.00   3.6  26.0  12:30a  ENE  86.84  0.0  0.0 Clear PeriodsLtWind-Breezy-Gusts
-----------------------------------------------------------------------------------------------------------------------------------------------------
    29.0  40.9    18    14.4    22  1116.3   0.0  3.28   1.1  30.0    30    SSE 793.43  9.3

(1) As measured on Front Lawn at 21:00, rounded to the nearest inch if there is uncertainty.
* SSE until 1 p.m.; After 1 p.m. Unknown since Wind Direction Vane Frozen at SSW
** WSW until being Frozen beginning at about 5 AM 
STATISTICS | DATA | GRAPHS | CONDITIONS - DAY of MONTH: 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 27 28 29 30 31| TOP 
AVERAGE Mean Temp:	29.0
AVERAGE High Temp:	32.8
MINIMUM High Temp:	23.6	31st
MAXIMUM High Temp:	40.9	18th
AVERAGE Low Temp:	25.6
MINIMUM Low Temp:	14.4	22nd
MAXIMUM Low Temp:	35.5	25th, 26th
LoWEST Wind Chill Temp: 11	31st (based on 10 minute Average Wind Speed)
		
MAX >= 90.0:		0
MAX >= 80.0:		0
MAX >= 70.0:		0
MAX <= 32.0:		14	6th, 7th, 9th, 10th, 11th, 12th, 13th, 14th, 15th, 19th, 20th, 21st, 22nd, 31st
MIN <= 32.0:		23	All but: 1st, 2nd, 3rd, 24th, 25th, 26th, 27th, 28th
MIN <=  0.0:		0
		
MAXIMUM Humidity (%):	94	26th, 27th, 28th, 29th
MINIMUM Humidity (%):	30	31st @ 1943
		
MAXIMUM Pressure (mb):	1046.4	5th @ 0514
MINIMUM Pressure (mb):	988.2	18th @ 0029
		
TOTAL   Htg Deg Days:	1116.3
AVERAGE Htg Deg Days:	36.0
MINIMUM Htg Deg Days:	27.1	25th, 26th
MAXIMUM Htg Deg Days:	46.7	21st
TOTAL Cool Deg Days:	0.0
Heat Base:  65.0  Cool Base:  65.0  Method: Integration
		
TOTAL   Precip.:	3.28
AVERAGE Precip. A:	0.25	(Per day, for the 13 days with measurable precip.; including the 3 days with a Trace = 0.21)
AVERAGE Precip. B:	0.11	(Per day)
DAYS of Precip.:	16	1st, 2nd, 3rd, 9th, 10th, 14th, 15th, 16th, 17th, 18th, 19th, 23rd, 24th, 25th, 26th, 27th
MAXIMUM Precip.:	0.72	2nd
MAXIMUM Rain Rate:	0.21	18th @ 0705
Days of Rain: 12 (>.01 in) 9 (>.1 in) 0 (>1 in)
TOTAL Snowfall:		9.3
DAYS of Snowfall:	9	4th, 9th, 14th, 15th, 16th, 17th, 18th, 19th, 23rd
		
AVERAGE High Wind:	12.2
MINIMUM High Wind:	4	9th
MAXIMUM High Wind:	30	30th
WIND RUN (miles):	794.07
		

DAYS Full Sun any
time - Mainland Only:	17	4th, 5th, 6th, 7th, 8th, 9th, 11th, 12th, 13th, 14th, 15th, 18th, 20th, 21st, 29th, 30th, 31st

DAYS Weak Sun any 
time - Mainland Only:	1	1st

DAYS All Clear Sky:	4	21st, 29th (with Fog), 30th, 31st

DAYS OF Cld or M Cld:	27	All but: 21st, 30th, 31st
DAYS OF Rainbow:	0
DAYS OF Aurora:		0
DAYS OF Lightning:	0
DAYS OF Earthquake:	0



GRAPHS | DATA | STATISTICS | CONDITIONS - DAY of Month: 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 27 28 29 30 31 | TOP

December 2009 - Barometric Pressure & Temperature with Highs & Lows.

December 2009 - Dewpoint & Humidity.

December 2009 - Rainfall & High Rain Rate with Pressure & Humidity.

December 2009 - High Wind, Wind Run, & 10 min. Avg Wind Speed.



CONDITIONS - DAY of Month: 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 27 28 29 30 31 | DATA | STATISTICS | GRAPHS | TOP

Thur. 12/31/09: DATA | Wind Advisory now in effect until 4 PM AST Friday - See 1141 Below

Wed. 12/30/09: DATA | 1516: A NWS Wind Advisory is in now effect until 9 AM AST Friday - See 1516 Below | 1935: Wind Direction Vane is Now Fully Functional

Tue. 12/29/09: DATA | A Dense Fog Advisory issued by the NWS at 1711 was Cancelled at 2047 | Since about 5 AM the Wind Direction Vane has been Frozen | A NWS Dense Fog Advisory was in effect until 10 AM AST this morning - See 0603 Below

Mon. 12/28/09: DATA

SUNDAY 12/27/09: DATA

Sat. 12/26/09: DATA

Fri. 12/25/09: DATA | Christmas - Celebrating the Birth of our Lord and Savior Jesus Christ - Merry Christmas!

Thur. 12/24/09: DATA | Christmas Eve

Wed. 12/23/09: DATA | NWS Winter Weather Advisory Expired at 6 PM Today - See 1756 Below | Wind Direction Vane Is Operational Now - Since about 0350

Tue. 12/22/09: DATA | NWS Winter Weather Advisory remains in effect from 3 AM to 6 PM AST Wednesday - See 1937 Below | Wind Direction Vane Remains Frozen

Mon. 12/21/09: DATA | 1st Day of Winter - Winter Solstice at 8:47 AM AST | 1548: The NWS Wind Advisory was Cancelled at 1548 - See 1548 Below | Wind Direction Vane Remains Frozen

SUNDAY 12/20/09: DATA | 4th Sunday in Advent | NWS Wind Advisory in Effect from 6 PM this Evening to 6 PM AST Monday out of Interior Passes - See 1217 Below | The Wind Direction Vane is Still Frozen

Sat. 12/19/09: DATA | Since about 1300 hrs. 12/18 the Wind Direction Vane is Frozen

Fri. 12/18/09: DATA | NWS Wind Advisory was Cancelled at 0920 AST this morning - See 0920 Below | From about 1300 hrs., and continuing for the rest of the day, the Wind Direction Vane seems to be Frozen at the SSW Direction

Thur. 12/17/09: DATA

Wed. 12/16/09: DATA | The NWS Winter Weather Advisory was Cancelled at 0457

Tue. 12/15/09: DATA | NWS Winter Weather Advisory remains in effect until 6 AM AST Wednesday - See 1958 Below

Mon. 12/14/09: DATA | Golden-Crowned Sparrow - See 1309 Below

SUNDAY 12/13/09: DATA | 3rd Sunday in Advent | NWS Wind Advisory was Cancelled at 0917 Today - See 0917 Below

Sat. 12/12/09: DATA | 1745: NWS Wind Advisory is now in effect until Noon AST Sunday - See 1745 Below

Fri. 12/11/09: DATA | NWS Wind Advisory in effect from 3 PM Saturday to 3 PM AST Sunday - See 1848 Below | 7th Anniversary of the West Juneau Weather Station being on the Internet

Thur. 12/10/09: DATA

Wed. 12/09/09: DATA | NWS Dense Fog Advisory issued at 0032, expired at 10 AM AST this Morning - See 0940 Below

Tue. 12/08/09: DATA

Mon. 12/07/09: DATA | Pearl Harbor Day

SUNDAY 12/06/09: DATA | 2nd Sunday in Advent

Sat. 12/05/09: DATA

Fri. 12/04/09: DATA

Thur. 12/03/09: DATA | The NWS Summary of November 2009 Weather - See Below

Wed. 12/02/09: DATA

Tue. 12/01/09: DATA