BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, APRIL 16, 2007 PATRIOTS DAY ALL TIMES ARE IN EASTERN STANDARD TIME WILD AND POWERFUL MID-APRIL NOR'EASTER BRINGS WIND GUSTS OVER 70 MPH HERE AT THE OBSERVATORY AND 3.31 INCHES OF RAINFALL.... Here's a run-down on our peak gusts recorded for the storm thru noon today: Peak gusts were all recorded this morning: Maximum, Inc. Maestro 80 mph Maximum, Inc. Merlin 74 mph E Aerovane 74 mph E @ 6:14 a.m. 420C recorder 73 mph E @ 6:14 a.m. ASOS 72 mph E @ 6:14 a.m. ASOS 2-min-sustained 52 mph E @ 6:15 a.m. Davis 66 mph E @ 6:14 a.m. Davis 2-min-sustained 49 mph E @ 6:15 a.m. Rainfall total 3.31 inches; ASOS 3.17 inches. Today's observations: 7 A.M. Weather: Low overcast, light rain and fog Temperature: 49F, Dew point: 49F, Wind: E at 30G52 kts Wind: Peak wind E at 56 kts at 03 past the hour Sea-level pressure: 28.92 Hg, steady Visibility: 4 miles 6-hour min. 46 deg. 24-hour rainfall: 2.93 ins. BHO SA 1155 E6 OVC 4R-F 793/49/49/1030G52/892/ CIG RGD PK WND 0956/03/ R- MDT R PST HR/ 8/7// 56034 ASOS 60088 MANUAL 6085/ ASOS 70274 MANUAL 70293 10049 20046 10 A.M. Weather: Overcast with bright spots, rain and drizzle ended past hour Temperature: 46F, Dew point: 42F, Wind: SE at 22G35 kts Wind: Peak wind SE @ 35 kts at 49 pst the hour Sea-level pressure: 28.95 inches Hg, rising Visibility: 10 miles 3-hourly rainfall: 0.38 inch BHO SA 1455 15 SCT E20 BKN 28 OVC 10 802/46/42/1322G35/895/ BRGHT SPTS IOVC SUN OCNL DMLY VSB PK WND 1335/49/ WND 09V15 GRDLY VEERING/ 8/7// 53009 MANUAL 6038/ ASOS 60043 1 P.M. Weather: Overcast with bright spots Temperature: 44F, Dew point: 35F, Wind: SE at 18G30 kts Wind: Peak wind ESE @ 38 kts at 17 past the hour Sea-level pressure: 28.95 inches Hg, rising Visibility: 25 miles 6-hourly rainfall: 0.38 inch 6-hourly min. temp. 44 deg. BHO SA 1755 E22 BKN 30 OVC 25 824/44/35/1218G30/906 BRGHT SPTS IOVC RWU VSBY LWR SW-W PK WND 1238/17/ 8/5// 53022 MANUAL 6038/ ASOS 60043 10050 20044 WEATHER SUMMARY FOR SUNDAY, APRIL 15 TEMPERATURE (DEGREES F) MAX.....44 NORMAL.....55 MIN.....35 NORMAL.....37 MEAN....40 NORMAL.....46 DEPARTURE FROM 30-YEAR NORMAL...........-6 TOTAL DEPARTURE FOR THE MONTH..........-93 (-6.4 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........25 DEPARTURE.........+6 TOTAL HEATING UNITS FOR THE MONTH.........412 DEPARTURE........+93 TOTAL HEATING UNITS FOR THE SEASON.......5406 DEPARTURE.......-378 TOTAL HEATING UNITS LAST SEASON TO DATE..5183 DIFFERENCE......+223 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............66 E AT 11:27 P.M. AEROVANE.............64 E AT 11:27 P.M. ASOS.................68 E AT 11:27 P.M. DAVIS................N/A FASTEST MILE FOR YESTERDAY..............49 E AT 11:38 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........49 E AT 11:38 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........N/A AVERAGE WIND SPEED AND DIRECTION......19.4 E ASOS..............19.2 DAVIS.............17.8 E [090 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....2.93 DEPARTURE.....+2.78 ASOS..............2.74 TOTAL PRECIPITATION FOR THE MONTH..........5.72 DEPARTURE.....+3.48 ASOS..............5.40 TOTAL PRECIPITATION FOR THE YEAR..........17.47 DEPARTURE.....+1.59 ASOS.............17.04 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE......-0.1 TOTAL SNOWFALL FOR THE MONTH................0.2 DEPARTURE......-1.4 TOTAL SNOWFALL FOR THE SEASON..............27.6 DEPARTURE.....-30.9 PRELIMINARY CLIMATE SUMMARY FOR APRIL 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 4/1 59/33/46/+5/0.42/0/511/67 30 S 4/2 39/35/37/-5/0.33/0/000/00 27 E 4/3 41/32/37/-5/0.04/0/000/00 28 ENE 4/4 36/32/34/-8/0.90/0.2/000/00 38 E 4/5 43/26/35/-8/0.21/T/163/21 36 WSW 4/6 39/23/31/-12/0/0/590/76 36 WSW 4/7 40/26/33/-10/0/0/405/52 35 W 4/8 40/25/33/-11/0/0/619/79 44 W Aero 42 MPH W 4/9 50/30/40/-4/0/0/746/95 36 W 4/10 43/30/37/-7/0/0/158/20 28 W 4/11 51/28/40/-5/0/0/.../.. 22 SSE 4/12 39/32/36/-9/0.89/T/000/00 42 E Aero 40 MPH E 4/13 47/31/39/-6/0/0/.../.. 41 W Aero 42 MPH W 4/14 52/35/44/-2/0/0/.../.. 37 W 4/15 44/35/40/-6/.../0/000/00 66 E Aero 64 MPH E 4/16 morning low temp. 44 deg. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 16 HIGH 87 IN 1896 LOW 23 IN 1943 PRECIP 2.45 INCHES IN 1929 SNOWFALL 2.0 INCHES IN 1904, 1962 PEAK GUST 63 MPH SSE IN 1996 RECORDS FOR APRIL 17 HIGH 93 IN 2002 LOW 21 IN 1908 PRECIP 1.68 IN 1954 SNOWFALL 1.0 IN. IN 1899 PEAK GUST 58 MPH NW IN 1994 TODAY'S REPORT By: Bob Skilling