BLUE HILL METEOROLOGICAL OBSERVATORY, MILTON, MASSACHUSETTS 02186 ELEVATION 635 FT. ABOVE MSL....10 MILES SSW OF BOSTON, MA TUESDAY APRIL 23 2002 PLEASE VISIT OUR WEB SITE AT: http://www.bluehill.org/ DAILY DISCUSSION.....4/23/2002....11 a.m. FINAL PRECIPITATION EVENT TOTAL 0.29 INCH AND TRACE OF SNOW.... SUMMIT HAS SLIGHT ACCUMULATION THIS MORNING...AS LOW TEMP. DIPS TO 31 DEGREES BY 6 A.M. The cold rain and wet snow over the past 24 hours has amounted to just over a quarter of an inch of precipitation...about two days worth of precipitation and certainly not enough to help with the continuing deficit. Snowfall was only a trace although as precipitation was winding down early this morning light snow fell and accumulated in a few places here at the summit including tree branches and car roofs and on metal surfaces on the roof of the tower. However, the ground and snow boards were essentially just wet so went with a trace. Might have been possible to call it 0.1 inch but with no general ground covering I believe the best call was a trace. 4/23/2002 TUE 8 A.M. BHO SA 1155 E3 OVC 4S-F 141/33/32/3307/995/ 3 OVC OCNL BKN HIER CLDS VSB PCPN VRY LGT/ 8/6/// 51020 6001/ 70028 10035 20031 11 A.M. BHO SA 1455 18 SCT E25 OVC 50 153/39/32/3310/998/ BINOVC/ 8/5/// 52012 6000/ THE DATA RECORDED FOR MONDAY APRIL 22... TEMPERATURES....CALENDAR DAY MIDNIGHT TO MIDNIGHT....EST MAX : 40 MIN: 35 // ASOS MAX: 40 ASOS MIN: 35 NORMAL HIGH AND LOW: 57/39 MEAN 38 [- 11] TOTAL DEPARTURE FOR APRIL TO DATE: +142 deg. THE APRIL TEMPERATURE IS 6.3 DEGREES ABOVE NORMAL..... PRECIPITATION....ON 04/23 AS OF 8 A.M. 24 HRS ENDING 8 A.M. . 0.28 INS. ASOS......................0.24 INS. TOTAL FOR APRIL TO DATE...1.98 INS. STD GAGE DEP. FROM NORMAL........- 1.26 INS. PRECIP. TOTAL YEAR 2002: 11.90 INS. DEPARTURE FROM NORMAL....-4.69 INS. SNOWFALL.... ON 04/23 AS OF 8 A.M. 24 HRS ENDING 7 A.M.... TRACE APRIL TOTAL SNOWFALL......0.6 INS. SEASONAL TOTAL TO DATE. 39.6 INS. WIND DATA....FOR 04/22... PEAK GUST ASOS: MM MPH M AT M (power glitch, memory lost) PEAK GUST 420C: 30 MPH E AT 9:07 A.M. EDT PEAK GUST AERO: 29 MPH E AT 9:07 A.M. EDT APRIL 2002 PRELIMINARY DATA....ALL IS CALENDAR DAY DATA.... MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUNSHINE/ OFFICIAL 420C WIND GUST Aero = Aerovane recording wind system 4/1 56/38/47/+6/1.02/0/244/32/ 54 W (Aero 53 MPH W ) 4/2 59/33/46/+4/0/0/582/76/ 37 W 4/3 66/36/51/+9/0.16/0/138/18/ 43 S (Aero 45 MPH WNW ) 4/4 48/31/40/-2/0/0/694/90/ 31 WNW 4/5 44/26/35/-8/0.02/0.6/410/53/ 22 NNW 4/6 45/28/37/-6/T/T/389/50/ 31 NW 4/7 46/23/35/-8/0/0/741/95/ 29 NNW 4/8 55/36/46/+2/0.01/0/023/03/ 32 S 4/9 69/46/58/+14/T/0/440/56/ 46 SSW 4/10 65/47/56/+12/0.12/0/638/81/ 32 NW 4/11 52/38/45/0/0/0/751/95/ 28 E 4/12 65/37/51/+6/0/0/746/94/ 40 S 4/13 74/53/64/+19/T/0/207/26/ 40 SW 4/14 76/53/65/+19/0.06/0/647/81/ 39 W 4/15 62/44/53/+7/0.10/0/209/26/ 22 SSW 4/16 86/44/65/+19/0/0/539/67/ 21 SSW 4/17 93/51/72/+25/0/0/646/80/ 51 NE (new daily record max. temp. ) 4/18 72/45/59/+12/0.17/0/583/72/ 24 NNW 4/19 78/44/61/+14/0.02/0/260/32/ 31 SSW 4/20 68/45/57/+9/T/0/196/24/ 27 N 4/21 56/40/48/0/0/0/450/55/ 33 WNW 4/22 40/35/38/-11/0.27/T/000/00/ 30 E 4/23 morning low temp. 31; precip. in am, 0.02; snowfall trace RECORDS FOR APRIL 23 HIGH 85 IN 1908 LOW 25 IN 1933,1989 PRECIP 1.51 INS 1998 SNOWFALL: 0.5 INS. IN 1911, 1956 PEAK GUST 64 MPH WNW IN 1962 RECORDS FOR APRIL 24 HIGH 82 IN 2001 LOW 22 IN 1930 PRECIP 2.51 INS 1998 SNOWFALL: 1.2 INS. IN 1967 PEAK GUST 59 MPH NW IN 1962 e = estimated Robert Skilling