BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, APRIL 2, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] MODERATE TO HEAVY RAIN AND FOG THIS MORNING... WARM FRONT INCREASING TEMPERATURES THIS AFTERNOON... Rain began between 4 and 5 AM this morning and continued at mostly moderate intensity until about noon, though there were intervals of heavy rain. Storm total precipitation through 1 PM is 0.96 inch with very light rain in progress at that time. Steady rain is expected to return later in the day. As of 2:30 PM, the temperature has climbed to 45 degrees as a warm front moves into Southern New England ahead of the next area of rain. A peak wind gust to 35 mph ENE occurred earlier this morning at 8:11 AM. MARCH 2005 SUMMARY Temp Max: 40.2 F Temp Min: 24.7 F Temp Mean: 32.5 F (max+min)/2 Temp Mean: 32.4 F (24 hr corr.) Precipitation: 6.12 inches Snowfall: 25.0 inches Peak Gust: 63 mph WNW 8th Today's observations: 7 A.M. Weather: Sky obscured with moderate rain and fog Temperature: 36F, Dew point: 36F, Wind: NE 16G29 mph Sea-level pressure: 30.00 inches, falling Visibility: 1 mile, variable from 1/2 to 1 1/2 miles 24-hour precipitation: 0.19 inch BHO SA 1155 W4 X 1VRF 160/36/36/0614G25/000/ VSBY 1/2V11/2 PK WND 0627/1125/ 8//// 56014 6019/ 70019 10037 20035 10 A.M. Weather: Sky partly obscured and overcast with moderate rain and fog Temperature: 37F, Dew Point: 37F, Wind: NE 12 mph Visibility: 1 1/2 miles Sea-level pressure: 29.94 inches, falling BHO SA 1455 -X E5 OVC 11/2RF 140/37/37/0710/994/ R+B23E29 VSBY NE1/2 SE2/ 8//// 56020 60XX/ 1 P.M. Weather: Sky obscured with light rain and heavy fog Temperature: 40F, Dew Point: 40F, Wind: NE 14 mph Visibility: 1/16 mile Sea-level pressure: 29.82 inches, falling rapidly 6-hour precipitation: 0.77 inch BHO SA 1755 W1 X 1/16R-F 099/40/40/0412/982/ R-E30B55 PCPN VRY LGT STRA DRFTG OVR SMT PRESFR WND 01V08/ 8//// 58041 6077/ 10040 20036 WEATHER SUMMARY FOR FRIDAY, APRIL 1: TEMPERATURE (DEGREES F) MAX.....56 NORMAL.....50 ASOS.....56 AT 2:45 P.M. MIN.....36 NORMAL.....33 ASOS.....36 AT 12:04 A.M. MEAN....46 NORMAL.....41 DEPARTURE FROM 30-YEAR NORMAL......+5 TOTAL DEPARTURE FOR THE MONTH......+5 (+5.0 DEGREES/DAY) HEATING DEGREE DAY INFORMATION TOTAL HEATING DEGREE DAYS FOR FRIDAY.........19 DEPARTURE.....-5 TOTAL HEATING DEGREE DAYS FOR THE MONTH......19 DEPARTURE.....-5 TOTAL HEATING DEGREE DAYS FOR THE SEASON...5482 DEPARTURE.....-6 TOTAL HEATING DEGREE DAYS FOR LAST YEAR....5518 DIFFERENCE...-37 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........23 SE AT 7:15 P.M. AEROVANE.........24 SE AT 7:03 P.M. ASOS.............23 SE AT 7:03 P.M. DAVIS............25 SE AT 7:03 P.M. FASTEST MILE FOR YESTERDAY..........17 SE AT 7:05 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......17 SE AT 7:15 P.M. AVERAGE WIND SPEED AND DIRECTION...8.0 SE ASOS............7.5 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.19 DEPARTURE....+0.04 ASOS..............0.19 TOTAL PRECIPITATION FOR THE MONTH..........0.20 DEPARTURE....-0.10 ASOS..............0.20 TOTAL PRECIPITATION FOR THE YEAR..........16.66 DEPARTURE....+2.88 ASOS.............15.68* *EXCLUDES 3.19 INCHES OF ERRONEOUS PRECIPITATION RECORDED FROM 1/23-1/28. SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.2 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE.....-0.4 TOTAL SNOWFALL FOR THE SEASON.............119.2* DEPARTURE....+61.6 * THIRD GREATEST SEASONAL SNOW TOTAL ON RECORD. PRELIMINARY CLIMATE SUMMARY FOR APRIL 2005......CALENDAR DAY DATA DATA REPORTED: DATE MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 4/1 56/36/46/+5/0.01/0/.../.. 23 MPH SE 4/2 ..overnight low 35 PRELIMINARY CLIMATE SUMMARY FOR MARCH 2005......CALENDAR DAY DATA DATA REPORTED: DATE MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 3/1 29/23/26/-6/0.53/3.6/000/00 52 MPH NNE Aero 52 MPH NNE 3/2 33/20/27/-5/T/T/264/39 42 MPH W Aero 45 MPH W 3/3 28/15/22/-10/0/0/640/94 43 MPH W Aero 43 MPH W 3/4 31/12/22/-11/0/0/561/82 40 MPH W Aero 44 MPH W 3/5 39/18/29/-4/0/0/679/99 29 MPH W 3/6 40/24/32/-1/0/0/345/50 42 MPH SSW Aero 44 MPH SSW 3/7 47/33/40/+7/0/0/201/29 45 MPH S Aero 50 MPH SSE 3/8 42/12/27/-7/1.20/5.7/000/00 63 MPH WNW Aero 66 MPH WNW 3/9 21/06/14/-20/0.02/0.3/663/95 54 MPH W Aero 58 MPH W 3/10 29/11/20/-14/0/0/673/96 29 MPH WSW 3/11 32/18/26/-10/0.07/1.0/134/19 29 MPH E 3/12 34/28/31/-4/1.19/8.9/000/00 27 MPH NE 3/13 37/25/31/-4/0.01/0.1/291/41 25 MPH W 3/14 39/21/30/-6/0/0/669/94 31 MPH WNW 3/15 44/24/34/-2/0/0/512/72 30 MPH WNW 3/16 43/26/35/-1/0/0/675/94 29 MPH W 3/17 43/23/33/-4/0/0/606/84 25 MPH WNW 3/18 43/29/36/-1/0/0/506/70 27 MPH WNW 3/19 45/25/35/-2/0/0/697/96 28 MPH WNW Aero 31 MPH WNW 3/20 48/28/38/0/T/0/365/50 27 MPH SSW 3/21 41/33/37/-1/0/0/007/01 21 MPH NNE 3/22 52/29/41/+3/0/0/720/98 29 MPH W 3/23 42/30/36/-2/0.12/1.0/022/03 36 MPH ENE 3/24 37/31/34/-5/0.47/4.4/022/03 40 MPH N Aero 41 MPH NNE 3/25 47/30/39/0/0/0/461/62 30 MPH W 3/26 40/26/33/-6/0/0/709/95 22 MPH 3/27 52/28/40/0/0/0/705/94 24 MPH SSW 3/28 42/32/37/-3/2.15/0/000/00 27 MPH N *** 3/29 47/38/43/+3/0.36/0/000/00 38 MPH NNW 3/30 52/34/43/+2/0/0/682/90 33 MPH N 3/31 48/35/42/+1/0/0/632/83 25 MPH NE DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 2 HIGH 77 IN 1967 LOW 14 IN 1919 PRECIP 1.83 IN. IN 1970 SNOWFALL 13.0 IN. IN 1887 PEAK GUST 76 MPH SSW IN 1970 RECORDS FOR APRIL 3 HIGH 76 IN 1892 LOW 16 IN 1894 PRECIP 2.18 IN. IN 1990 SNOWFALL 8.0 IN. IN 1915 PEAK GUST 83e MPH NW IN 1977 [RECORD FOR MONTH] TODAY'S REPORT BY: Mike Iacono