BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, FEBRUARY 27, 2009 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Scattered cirrus, few stratus all quadrants Temperature: 37F, Dew point: 36F, Wind: SSE at 18G26 kts Wind: Peak gust past hour 26 kts SSE at 6:53 A.M. Sea-level pressure: 30.18 inches Hg, falling Visibility: 20 miles, thin fog 6-hour minimum temperature: 34F Snow depth on ground: trace BHO SA 1155 250 SCT 20 221/37/36/1518G26/018/ FEW STRA ALQDS K LYR SW-NW THN F PK WND 1526/53/ 8/601 58016 10037 20034 10 A.M. Weather: Scattered stratocumulus, thin broken cirrus, cumulus forming all quadrants, patches dense cirrus Temperature: 51F, Dew point: 45F, Wind: SSE at 20G28 kts Wind: Peak gust past hour 28 kts SSE at 9:54 A.M. Sea-level pressure: 30.11 inches Hg, falling Visibility: 25 miles, light haze BHO SA 1455 40 SCT 250 –BKN 25 198/51/45/1520G28/011/ CU FRMG ALQDS PTCHS DENS CI LGT HZ PK WND 1528/54/ 8/802 58023 1 P.M. Weather: Scattered stratocumulus, thin broken cirrus, patches dense cirrus Temperature: 58F, Dew point: 46F, Wind: S at 32G44 kts Wind: Peak gust past hour 44 kts SSE at 12:52 P.M. Wind: Direction variability ESE to SSW Sea-level pressure: 30.01 inches Hg, falling Visibility: 25 miles, light haze 6-hour maximum temperature: 58F BHO SA 1755 35 SCT 250 –BKN 25 163/58/46/1732G44/001/ PTCHS DENS CI LGT HZ PK WND 1644/52 WND 12V20/ 8/502 58035 10058 20037 WEATHER SUMMARY FOR THURSDAY, FEBRUARY 26 TEMPERATURE (DEGREES F) MAX.....47 NORMAL.....39 MIN.....26 NORMAL.....23 MEAN....37 NORMAL.....31 DEPARTURE FROM 30-YEAR NORMAL.................+6 TOTAL DEPARTURE FOR THE MONTH................+46 [+1.6 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY.............28 DEPARTURE.........-6 TOTAL HEATING UNITS FOR THE MONTH............914 DEPARTURE........-52 TOTAL HEATING UNITS FOR THE SEASON..........4482 DEPARTURE........-20 TOTAL HEATING UNITS LAST SEASON TO DATE.....4118 DIFFERENCE......+364 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............31 S AT 1:16 P.M. AEROVANE.............30 S AT 10:07 A.M. ASOS.................32 SSW AT 10:07 A.M. DAVIS................32 SSW AT 1:16 P.M. FASTEST MILE FOR YESTERDAY..............24 S AT 1:21 P.M. * MAXIMUM 2-MINUTE ASOS AVERAGE...........23 SSW AT 1:23 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........24 SSW AT 12:44 P.M. AVERAGE............16.0 S ASOS...............16.3 DAVIS..............15.3 S [181 DEGREES] * last of several occurrences.... 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...........2.17 DEPARTURE.........-1.59 ASOS...............2.14 TOTAL PRECIPITATION FOR THE YEAR............6.33 DEPARTURE.........-2.21 ASOS...............7.34 # # Includes erroneous ASOS precipitation data on 1/1/09 and 1/2/09 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.........-0.5 TOTAL SNOWFALL FOR THE MONTH...............10.2 DEPARTURE.........-4.8 TOTAL SNOWFALL FOR THE SEASON..............65.3 DEPARTURE........+20.9 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2009 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 2/1 45/15/30/+4/0/0/402/67 35 SW 2/2 50/32/41/+15/0/0/568/94 29 NNW 2/3 33/22/28/+2/0.44/5.6/000/00 39 N AERO 38 MPH N 2/4 24/10/17/-9/0.05/0.9/572/94 37 WNW 2/5 17/3/10/-17/0/0/538/88 33 W 2/6 26/4/15/-12/0/0/509/83 26 W 2/7 42/16/29/+2/0/0/314/51 45 S AERO 44 MPH S 2/8 49/30/40/+13/0/0/433/70 54 W AERO 54 MPH W 2/9 37/21/29/+2/0/0/621/100 38 WNW AERO 38 MPH WNW 2/10 36/22/29/+2/0/0/006/01 21 SSE 2/11 59/34/47/+20/0/0/482/77 29 SSE 2/12 51/37/44/+16/0.13/0/063/10 54 WSW AERO 54 MPH WSW 2/13 38/24/31/+3/0/429/68 47 W AERO 47 MPH W 2/14 39/20/30/+2/0/0/595/94 42 W AERO 40 MPH W 2/15 39/23/31/+3/0/0/637/100 30 NW AERO 28 MPH NW 2/16 35/21/28/0/0/0/633/99 23 NW 2/17 35/19/27/-2/0/0/641/100 21 NW 2/18 41/24/33/+4/0.25/1.6/361/56 33 E 2/19 46/24/35/+6/0.34/0.4/155/24 43 W AERO 44 MPH W 2/20 27/18/23/-6/T/T/364/56 50 W AERO 48 MPH W 2/21 37/23/30/+1/0/0/626/96 42 W AERO 37 MPH W 2/22 41/28/35/+5/0.83/1.7/000/00 46 W AERO 48 MPH W 2/23 31/18/25/-5/T/T/507/77 51 W AERO 53 MPH W 2/24 34/15/25/-5/0/0/661/100 35 WNW AERO 28 MPH WNW 2/25 37/17/27/-4/0/0/431/65 22 NW AERO 17 MPH NW 2/26 47/26/37/+6/0/0/.../.. 31 S 2/27 morning low temp. 34F; normal low is now 23F NEW DAILY RECORDS FOR FEBRUARY 2009... None to date DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR FEBRUARY 27 HIGH 61F IN 1976 LOW -8F IN 1900 PRECIP 0.90 INCHES IN 1922 SNOWFALL 6.0 INCHES IN 1922 PEAK GUST 67 MPH W IN 1985 RECORDS FOR FEBRUARY 28 HIGH 62F IN 1976 LOW -2F IN 1907,1934 PRECIP 1.79 INCHES IN 1958 SNOWFALL 8.5 INCHES IN 2005 PEAK GUST 88e MPH SSW IN 1943 TODAY'S REPORT PREPARED By: Stephanie Radner