BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, JANUARY 22, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME   MORNING SNOWFALL AMOUNTS TO JUST 0.1 INCH   Light snow began falling before dawn and by the time it ended at 11:15 a.m. we could only measure 0.1 inch bringing the January total to 0.2 inch in this practically snowless month. There was not enough moisture in the snow to melt down anything close to 0.01, so just a trace of precipitation today.    Today's observations:   7 A.M.   Weather: Overcast with very light snow Temperature: 19F, Dew point: 03F, Wind: N at 04 kts Sea-level pressure: 30.05 inches Hg, rising Visibility: 25 miles 6-hourly min. temp. 18 deg. 24-hourly precip. and snowfall: trace BHO SA 1155 E60 OVC 25S- 177/19/3/0104/005/ BRGHT SPTS INOVC DSNT SE THN K NW-NW VSBY NE-SE 35 SBUKN PCPN VRY LGT/ 8/02/ 55017 MANUAL 6000/ 10019 20018   10 A.M.    Weather: Overcast with very light snow Temperature: 21F, Dew point: 12F, Wind: E at 06 kts Sea-level pressure: 30.03 inches Hg, falling    Visibility: 20 miles  BHO SA 1455 E55 OVC 20S- 171/21/12/0906/003/ PCPN VRY LGT TOTAL NEW SNW PST 3 HRS 0.1 IN/ 8/02/ 58006 MANUAL 6000/ 3-hourly snowfall: 0.1 inch 3-hourly precip:  trace   1 P.M.    Weather: Overcast stratocumulus  Temperature: 24F, Dew point: 14F, Wind: ENE at 03 kts Sea-level pressure: 29.92 inches Hg, falling    Visibility: 35 miles  BHO SA 1755 E32 OVC 35 132/24/14/0703/992/ FEW CU DSNT NE-ENE TOTAL NEW SNW PST 6 HRS 0.1 IN/ 8/8// 56039 6000/ 10024 20019 6-hourly snowfall: 0.1 inch 6-hourly precip:  trace 6-hourly max. temp. 24 deg.   WEATHER SUMMARY FOR SUNDAY, JANUARY 21    TEMPERATURE (DEGREES F) MAX.....24    NORMAL.....33 MIN..... 9    NORMAL.....17   MEAN....17    NORMAL.....25   DEPARTURE FROM 30-YEAR NORMAL.........-8 TOTAL DEPARTURE FOR THE MONTH.......+192 (+8.9 DEGREES/DAY)   HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........48   DEPARTURE.......+8 TOTAL HEATING UNITS FOR THE MONTH.........625   DEPARTURE.....-189 TOTAL HEATING UNITS FOR THE SEASON.......2498   DEPARTURE.....-645 TOTAL HEATING UNITS LAST SEASON TO DATE..2777   DIFFERENCE....-279   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............33 W   AT  6:42 A.M.                    AEROVANE.............33 W   AT  6:42 A.M.                     ASOS.................35 W   AT 11:56 P.M. [20th]                    DAVIS................33 W   AT 12:06 A.M. FASTEST MILE FOR YESTERDAY..............26 WNW AT  1:15 P.M.   MAXIMUM 2-MINUTE ASOS AVERAGE...........24 WNW AT  1:16 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........27 WNW AT  1:15 P.M. AVERAGE WIND SPEED AND DIRECTION......14.2 W                      ASOS..............13.2                        DAVIS.............14.5 W [280 deg.]   PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....trace DEPARTURE.......-0.16                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.81  DEPARTURE.......-0.47 [corrected]                          ASOS..............2.74    TOTAL PRECIPITATION FOR THE YEAR...........2.81  DEPARTURE.......-0.47 [corrected]                          ASOS..............2.74   SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........trace  DEPARTURE.....-0.5 TOTAL SNOWFALL FOR THE MONTH................0.1   DEPARTURE....-10.4 TOTAL SNOWFALL FOR THE SEASON...............3.8   DEPARTURE....-20.3   PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2007......CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST   AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available   1/1  53/30/42/+15/0.98/0/000/00     38 SE 1/2  43/31/37/+10/0.03/0/505/92     44 W    Aero 47 MPH W   1/3  49/30/40/+13/0/0/435/79        40 S   1/4  53/40/47/+20/0/0/198/36        31 SSW 1/5  61/46/54/+27/0.04/0/000/00     44 S    Aero 44 MPH S 1/6  66/48/57/+31/0.03/0/161/29     48 SSW  Aero 47 MPH SSW 1/7  50/38/44/+18/0/0/505/91        43 W    Aero 44 MPH W 1/8  52/36/44/+18/0.69/0/000/00     45 W    Aero 45 MPH W 1/9  41/29/35/+9/0/0/518/93         40 W    Aero 39 MPH W 1/10 34/22/28/+2/0/0/525/94         48 W 1/11 33/17/25/-1/0/0/.../..         36 S    Aero 38 MPH S 1/12 48/32/40/+14/0/0/.../..        38 SSW  Aero 39 MPH SSW 1/13 48/36/42/+16/0.06/000/00       30 S     1/14 38/31/35/+9/0.16/0/000/00      21 NE 1/15 40/31/36/+10/0.58/0/000/00     25 NNE 1/16 38/15/27/+1/0.05/0/.../..      40 W    Aero 42 MPH W 1/17 18/6*/12/-14/0.00/0/.../..     38 WNW  Aero 43 MPH WNW 1/18 36/10/23/-3/0.13/0.1/.../..    33 SSE 1/19 38/30/34/+9/0.06/T/.../..      40 W    Aero 41 MPH W 1/20 30/12/21/-4/T/T/.../..         51 W    Aero 55 MPH WNW 1/21 24/9/17/-8/0/0/.../..          33 W   1/22 morning low temp. 18 deg; normal now 17 deg.      a trace of precip. and snowfall   * min. temp. corrected to 6 deg. from 7 deg on 17th;   mean, dep. heating degree days all corrected accordingly.   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR JANUARY 22 HIGH 59F IN 1916 LOW -08F IN 1888,1976 PRECIP 1.24 INS. IN 1891,1987 SNOWFALL 7.0 INS. IN 1986 PEAK GUST 67 MPH W IN 1976   RECORDS FOR JANUARY 23 HIGH 62F IN 1906 LOW -10F IN 1976 PRECIP 2.40 INS. IN 1935 SNOWFALL 14.6 INS. IN 1966 PEAK GUST 85 MPH S IN 1992   TODAY'S REPORT By: Robert Skilling   If you do not wish to receive this Daily Discussion and Climate Summary from the Blue Hill Observatory, please send an email to sitemaster@bluehill.org.