BLUE HILL METEOROLOGICAL OBSERVATORY, MILTON, MASSACHUSETTS 02186 ELEVATION 635 FT. ABOVE MSL....10 MILES SSW OF BOSTON, MA SUNDAY MAY 19 2002 PLEASE VISIT OUR WEB SITE AT: http://www.bluehill.org/ SEE OUR NEW OFFICE CAM FACING WEST OUT WEST WINDOW AT www.bluehill.org/webcam DAILY DISCUSSION... 5/19/2002...11 a.m. RECORD LOW TEMPERATURES YESTERDAY AND AGAIN TODAY The temperature yesterday dropped to 35 degrees at 11:30 AM EDT and set a new record low for the date, beating the old record of 36 degrees which was established in 1891 and 1983. This was also the first record low temperature to be recorded since April 5, 1995. This morning we have set a record low for today's date with a low of 34 degrees at around 6:20am EDT. This beats the old record of 36 degrees which was established in 1891 and 1944. Total precipitation from the storm yesterday was 1.58 inches including a trace of sleet. OBSERVATIONS TODAY... 8 A.M. BHO SA 1155 CLR 70 174/40/32/2711/004/ DENSE CI DSNT ENE-S/ 8/002/ 53030 70109 10041 20034 11 A.M. BHO SA 1455 35 SCT 220 SCT 70 177/50/29/2813G20/005/ DENSE CI ENE-S/ 8/502/ 50003 THE DATA RECORDED FOR SATURDAY MAY 18... TEMPERATURES....CALENDAR DAY MIDNIGHT TO MIDNIGHT.... EASTERN STANDARD TIME... MAX : 51 MIN: 35 // ASOS MAX: 50 ASOS MIN: 35 NORMAL HIGH AND LOW: 68/48 MEAN 43 [ - 15] TOTAL DEPARTURE FOR MAY TO DATE: - 22 degrees THE MAY TEMPERATURE IS ABOUT 1.2 DEGREES COLDER THAN NORMAL TO DATE.... PRECIPITATION....ON 05/19 AS OF 8 A.M. 24 HRS ENDING 8 A.M. . 1.09 INS. (Trace of Sleet) ASOS......................1.10 INS. ASOS TOTAL FOR MAY....... 4.89 INS. TOTAL FOR MAY.............5.14 INS. STD GAGE DEP. FROM NORMAL........+ 2.91 INS. PRECIP. TOTAL YEAR 2002: 18.65 INS. DEPARTURE FROM NORMAL....-1.53 INS. WIND DATA....FOR 05/18... PEAK GUST ASOS: 38 MPH NNE AT 10:17 A.M. EDT PEAK GUST 420C: 46 MPH NE AT 10:17 A.M. EDT PEAK GUST AERO: 42 MPH NE AT 10:17 A.M. EDT MAY 2002 PRELIMINARY DATA....ALL IS CALENDAR DAY DATA.... MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUNSHINE/ OFFICIAL 420C WIND GUST Aero = Aerovane recording wind system ... data not yet available 5/1 58/38/48/-4/0.00/0/827/98/ 38 W 5/2 49/42/46/-6/0.62/0/000/00/ 35 SE 5/3 54/42/48/-5/0.02/0/747/88/ 71 W (Aero 70 MPH W)(Maximum, Inc. 74 mph ) 5/4 68/39/54/+1/0/0/842/99/ 33 WNW 5/5 72/46/59/+6/0/0/751/88/ 28 S 5/6 77/46/62/+8/0/0/668/78/ 38 S (Aero 39 MPH S)(Maximum, Inc. 40 MPH S ) 5/7 74/51/63/+9/0/0/369/43/ 39 SW 5/8 64/50/57/+3/0/0/679/79/ 30 NW 5/9 57/45/51/-4/0.07/0/009/01/ 30 ENE (daily precip. corrected ) 5/10 76/52/64/+9/0.13/0/727/84/ 45 WNW 5/11 66/46/56/0/0/0/790/91/ 39 W 5/12 56/44/50/-6/0.43/0/000/00/ 25 SE 5/13 45/41/43/-13/1.93/0/000/00/ 45 ENE 5/14 61/41/51/-6/0.35/0/.../../ 46 W 5/15 58/38/48/-9/T/0/.../../ 53 MPH W (Aero 52 MPH W ) 5/16 77/46/62/+5/0/0/.../../ 40 SSW 5/17 72/51/62/+5/0.01/0/.../../ 32 WNW 5/18 51/35/43/-15/1.58/T/.../../ 46 NE 5/19 Morning low 34 degrees, new record low. RECORDS FOR MAY 19 HIGH 91 IN 1962 LOW 36 IN 1891,1944 (Now 34 IN 2002) PRECIP 1.54 INS 1900 PEAK GUST 58 MPH NW IN 1964 RECORDS FOR MAY 20 HIGH 91 IN 1975,1996 LOW 37 IN 1948 PRECIP 1.65 INS 1969 PEAK GUST 57 MPH S IN 1963, WNW IN 1982 RECORDS FOR MAY 21 HIGH 92 IN 1921 LOW 35 IN 1907 PRECIP 1.61 INS 1954 PEAK GUST 69 MPH NW IN 1996 RECORDS FOR MAY 22 HIGH 93 IN 1911 LOW 35 IN 1907 PRECIP 3.75 INS 1920 PEAK GUST 49e MPH SSW IN 1947 RECORDS FOR MAY 23 HIGH 92 IN 1964,1992 LOW 38 IN 1976 PRECIP 0.97 INS 1979 PEAK GUST 49e MPH W IN 1945 e = estimated MFD