BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, JANUARY 26, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME Temperatures dropped below zero today for the first time this season. The low temperature so far today was -1 degree, which occurred close to 7:00 AM. As of 3:00 PM the high for today is just under 11 degrees. This will probably be a new record for the lowest maximum temperature for January 26. The previous record was 12 degrees, which occurred in 1905, 1912 and 1945. Today's observations: 7 A.M. Weather: Broken altocumulus Temperature: -1F, Dew point: -11F, Wind: WNW at 13 kts Sea-level pressure: 29.83 inches Hg, rising Wind: Peak wind 27 kts WNW past hour Visibility: 60 miles 6-hourly min. temp. -1 deg. BHO SA 1155 E110 BKN 60 103/-1/-11/2913/983/ SC CUFRM TPS NE-S WND 23V32 PK WND 2927/03/ 8/530 51010 10004 21001 10 A.M. Weather: Scattered altocumulus Temperature: 6F, Dew point: -10F, Wind: W at 20 kts Sea-level pressure: 29.84 inches Hg, rising Wind: Peak wind 29 kts W past hour Visibility: 60 miles BHO SA 1455 110 SCT 60 105/6/-10/2720/984/ FEW CU ALQDS PK WND 2829/08/ 8/130 50002 1 P.M. Weather: Scattered cumulus Temperature: 9F, Dew point: -10F, Wind: WNW at 16G24 kts Sea-level pressure: 29.78 inches Hg, falling Visibility: 70 miles 6-hourly max. temp. 11 deg. BHO SA 1755 45 SCT 70 083/9/-10/3016G24/978/ 8/100 58022 10011 21001 WEATHER SUMMARY FOR THURSDAY, JANUARY 25 TEMPERATURE (DEGREES F) MAX.....26 NORMAL.....34 MIN......6 NORMAL.....18 MEAN....16 NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL........-10 TOTAL DEPARTURE FOR THE MONTH.......+181 (+7.0 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........49 DEPARTURE......+10 TOTAL HEATING UNITS FOR THE MONTH.........794 DEPARTURE.....-179 TOTAL HEATING UNITS FOR THE SEASON.......2667 DEPARTURE.....-635 TOTAL HEATING UNITS LAST SEASON TO DATE..2908 DIFFERENCE....-241 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............30 NW AT 6:14 P.M. AEROVANE.............31 WNW AT 10:58 P.M. ASOS.................28 WNW AT 10:45 P.M. DAVIS................31 WNW AT 6:35 P.M. FASTEST MILE FOR YESTERDAY..............24 NW AT 7:29 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........23 WNW AT 8:31 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........24 WNW AT 6:36 P.M. AVERAGE WIND SPEED AND DIRECTION.......10.1 WNW ASOS...............11.5 DAVIS..............10.6 WNW [296 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE......-0.15 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.87 DEPARTURE......-1.01 ASOS..............2.80 TOTAL PRECIPITATION FOR THE YEAR...........2.87 DEPARTURE......-1.01 ASOS..............2.80 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.5 TOTAL SNOWFALL FOR THE MONTH................1.3 DEPARTURE....-11.2 TOTAL SNOWFALL FOR THE SEASON...............5.0 DEPARTURE....-21.1 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/-1/0/0/336/60 36 S Aero 38 MPH S 1/12 48/32/40/+14/0/0/168/30 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/+1/0.05/0/000/00 40 W Aero 42 MPH W 1/17 18/6/12/-14/0.00/0/563/99 38 WNW Aero 43 MPH WNW 1/18 36/10/23/-3/0.13/0.1/171/30 33 SSE 1/19 38/30/34/+9/0.06/T/269/47 40 W Aero 41 MPH W 1/20 30/12/21/-4/T/T/402/70 51 W Aero 55 MPH WNW 1/21 24/9/17/-8/0/0/449/78 33 W 1/22 24/18/21/-4/0.05/1.0/000/00 16 WNW 1/23 30/18/24/-1/0.01/0.2/.../.. 23 NW 1/24 38/22/30/+4/0/0/.../.. 30 W Aero 29 W 1/25 26/6/16/-10/T/T/.../.. 30 NW 1/26 morning low temp. -1 deg; normal now 18 deg. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 26 HIGH 68F IN 1950 [RECORD FOR MONTH] LOW -5F IN 1920 PRECIP 1.60 INS. IN 1958 SNOW 9.0 INS. IN 1898 WIND 90e MPH SE IN 1978 RECORDS FOR JANUARY 27 HIGH 63F IN 1974 LOW -12F IN 1924 PRECIP 1.59 INS. IN 1996 SNOWFALL 11.0 INS. IN 1894 PEAK GUST 91 MPH SSE IN 1996 TODAY'S REPORT By: Stephanie Radner