BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, MARCH 25, 2010 ALL TIMES ARE IN EASTERN STANDARD TIME The March warmth continues. The monthly mean temperature is 7.3 degrees above average. Only one day at or below average so far in March. Today's high of 64F through 2 P.M. continues the warm trend. Clouds on the increase ahead of the next weather system. Today's observations: 7 A.M. Weather: Thin cirrus, thin layer of smoke N thru NE Temperature: 40F, Dew point: 24F, Wind: WSW at 12 kts Wind: Direction variable S to W Sea-level pressure: 29.99 inches Hg, rising Visibility: 65 miles 6-hour minimum temp: 38F BHO SA 1155 250 –SCT 65 158/40/24/2412/999/ THIN K LYR N-NE WND 19V27/ 8/006 53017 10040 20038 10 A.M. Weather: Overcast cirrus, breaks in overcast all quadrants except W thru N, light distant haze, partial halo Temperature: 55F, Dew point: 26F, Wind: SSW at 9 kts Wind: Direction variable S to W Sea-level pressure: 29.98 inches Hg, falling Visibility: 60 miles BHO SA 1455 E220 BKN 250 OVC 60 153/55/26/2109/998/ FEW AC SW-W BINOVC XCPT W-N LGT DSNT HZ PARTIAL HALO WND 19V26/ 8/037 58005 1 P.M. Weather: Broken stratocumulus Temperature: 63F, Dew point: 25F, Wind: SSW at 14 kts Wind: Direction variable SSE to WSW Sea-level pressure: 29.88 inches Hg, falling Visibility: 55 miles 6-hour maximum temp: 64F BHO SA 1755 E200 SCT 250 OVC 55 119/63/25/2014/988/ FEW AC W-N FEW ACLS NW-N BINOVC OVHD WND 16V25/ 8/047 58034 10064 20040 WEATHER SUMMARY FOR WEDNESDAY, MARCH 24 TEMPERATURE (DEGREES F) MAX.....50 NORMAL.....47 MIN.....36 NORMAL.....30 MEAN....43 NORMAL.....39 DEPARTURE FROM 30-YEAR AVERAGE..............+4 TOTAL DEPARTURE FOR THE MONTH.............+181 [+7.3 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............22 DEPARTURE........-4 TOTAL HEATING UNITS FOR THE MONTH...........534 DEPARTURE......-185 TOTAL HEATING UNITS FOR THE SEASON.........4934 DEPARTURE......-355 TOTAL HEATING UNITS LAST SEASON TO DATE....5263 DIFFERENCE.....-329 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............48 W AT 11:24 A.M. AEROVANE..............50 W AT 11:24 A.M. ASOS..................46 NW AT 2:17 P.M. DAVIS.................50 W AT 10:13 A.M. THE FASTEST MILE FOR YESTERDAY...........37 WNW AT 2:17 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............33 NW AT 2:17 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........37 WNW AT 2:17 P.M. AVERAGE WIND SPEED AND DIRECTION.........21.8 W ASOS..................20.0 DAVIS.................22.2 WNW [294 DEG] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE.....-0.16 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH ........12.91 DEPARTURE.....+9.20 ASOS.............12.94 TOTAL PRECIPITATION FOR THE YEAR .........22.01 DEPARTURE.....+9.46 ASOS.............22.06 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M........ 0.0 DEPARTURE......-0.3 TOTAL SNOWFALL FOR THE MONTH............... 7.5 DEPARTURE......-2.3 TOTAL SNOWFALL FOR THE SEASON THRU FEB.....64.0 DEPARTURE......+8.8 PRELIMINARY CLIMATE SUMMARY FOR MARCH 2010 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 3/1 44/33/38/+6/0.38/3.2/047/07 43 NW AERO 42 MPH NW 3/2 43/32/38/+6/0/0/352/52 22 NNE 3/3 34/31/33/+1/0.18/1.7/000/00 45 NNE AERO 43 MPH NNE 3/4 33/30/32/-1/0.19/1.9/000/00 32 NNW 3/5 39/28/34/+1/0.06/0.5/226/33 28 N 3/6 54/27/41/+8/0/0/689/100 25 WNW 3/7 55/31/43/+10/0/0/684/99 28 W 3/8 58/36/47/+13/0/0/680/98 38 W 3/9 51/32/42/+8/0/0/656/94 31 WNW 3/10 53/30/42/+8/0/0/672/96 19 SE 3/11 46/35/41/+6/0.04/0/049/07 17 ENE 3/12 45/36/41/+6/T/0/007/01 26 NE 3/13 39/36/38/+3/1.60/0/000/00 53 NE AERO 50 MPH NE 3/14 45/38/42/+6/4.95/T/000/00 68 ENE AERO 67 MPH ENE 3/15 40/34/37/+1/2.86/0.2/000/00 53 NNE AERO 52 MPH NNE 3/16 49/34/42/+6/0/0/653/91 38 N AERO 35 MPH N 3/17 65/38/52/+15/0/0/698/97 24 WSW AERO 22 MPH WSW 3/18 65/43/54/+17/0/0/658/91 36 WSW AERO 32 MPH WSW 3/19 70/46/58/+21/0/0/661/91 23 SSW 3/20 71/47/59/+21/0/0/633/87 28 WSW 3/21 55/38/47/+9/0/0/643/88 26 NE 3/22 42/38/40/+2/0.05/0/000/00 36 NNE 3/23 44/39/42/+4/2.52/0/000/00 39 NNE 3/24 50/36/43/+4/0/0/.../../ 48 W AERO 50 MPH W 3/25 our morning low temp: 38F; the normal low is now 30F NEW DAILY RECORDS FOR MARCH 2010 3/14 - new daily record rainfall of 4.95 ins. surpasses the previous record of 1.72 ins. in 1974 3/14 - new daily record peak wind gust of 67 MPH ENE surpasses the previous record of 66 MPH WNW in 1982 3/15 - new daily record rainfall of 2.86 ins. surpasses the previous record of 1.33 ins. in 1972 3/19 - new record high maximum temperature of 70F; the previous record was 69F in 1903. 3/20 - new record high minimum temperature of 47F; the previous record was 46F in 1976. 3/23 - new daily record rainfall of 2.52 ins. surpasses the previous record of 1.58 ins. in 1903 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MARCH 25 HIGH 76 IN 1910 LOW 8 IN 1888, 1956 PRECIP 1.84 INS. IN 1909 SNOWFALL 1.0 INS. IN 1912 PEAK GUST 69 MPH SE IN 1969 RECORDS FOR MARCH 26 HIGH 76 IN 1922, 1949 LOW 6 IN 1960 PRECIP 1.99 INS. IN 1988 SNOWFALL 5.4 INS. IN 2001 PEAK GUST 63 MPH S IN 1970 TODAY'S REPORT PREPARED BY: Sean Fankhauser/Stephanie Radner