BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, OCTOBER 21, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME SUNNY, MILD AND DRY WEATHER CONTINUES The temperature is running above average again today, with a slightly warm morning low of 43F; normal being 41F. Also, early this afternoon our temperatures were in the middle 60's or more than 5 degrees warmer than normal. So today will mark 25 consecutive days since September 26 without a single day averaging below the daily average. We will be checking soon to see the last time during which we had such a long above normal temperature trend. The precipitation total for the month of 0.98 inch is exactly 2 inches drier than normal this late into October. Today's Observations: 7 A.M. Weather: Clear, patch altocumulus lenticularis distant WSW, few distant cirrus, patch cirrocumulus lenticularis ESE Temperature: 45F; Dew Point: 34F; Wind: WSW at 7 kts Sea-level pressure: 30.11 ins. Hg, rising then rising more rapidly Visibility: 55 miles, thin smoke layr along horizon NNE-NE, distant haze 6-hr min temp: 43F BHO SA 1155 CLR 55 196/45/34/2407/011/ PTCH ACSL DSNT WSW FEW DSNT CI PTCH CCSL ESE DSNT HZ/ 8/041 53014 10046 20043 10 A.M. Weather: Thin scattered cirrus, 2 levels, W-NE, patch altocumulus lenticularis distant NW Temperature: 58F; Dew Point: 38F; Wind: W at 6 kts, Sea-level pressure: 30.12 ins. Hg, rising then falling slightly Visibility: 60 miles, distant haze BHO SA 1455 300 –SCT 60 200/58/38/2606/012/ PTCH ACSL DSNT NW CI/FEW LWR CI W-NE DSNT HZ/ 8/041 50004 1 P.M. Weather: Clear, few small cumulus distant WNW-NNE, cirrus distant WNW-NE Temperature: 65F; Dew Point: 38F; Wind: WSW at 7 kts, Wind: Direction variable S-W Sea-level pressure: 30.06 ins. Hg, falling then more rapidly Visibility: 65 miles, except 70 miles NW, distant haze 6-hr max temp: 65F BHO SA 1755 CLR 65 181/65/38/2407/006/ FEW SML CU DSNT NNW-NNE CI DSNT WNW-NE VSBY NW 70 DSNT HZ WND 19V28/ 8/101 58019 10065 20045 WEATHER SUMMARY FOR SUNDAY, OCTOBER 20, 2013 TEMPERATURE (DEGREES F) MAX.....61 NORMAL.....59 MIN.....44 NORMAL.....41 MEAN....53 NORMAL.....50 DEPARTURE FROM 30-YEAR NORMAL.....................+3 TOTAL DEPARTURE FOR THE MONTH...................+100 [+4.8 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY..............0 DEPARTURE..........0 TOTAL COOLING UNITS FOR THE MONTH..............5 DEPARTURE..........0 TOTAL COOLING UNITS FOR THE SEASON...........701 DEPARTURE........+99 TOTAL COOLING UNITS LAST SEASON TO DATE......767 DIFFERENCE.......-66 HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............12 DEPARTURE.........-3 TOTAL HEATING UNITS FOR THE MONTH.............135 DEPARTURE.......-101 TOTAL HEATING UNITS FOR THE SEASON............281 DEPARTURE........-97 TOTAL HEATING UNITS LAST SEASON TO DATE.......296 DIFFERENCE.......-15 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................33 W AT 1:43 P.M. AERO.......................36 W AT 1:35 P.M. ASOS.......................35 W AT 1:44 P.M. DAVIS......................31 W AT 1:31 P.M. RMY 34 FASTEST MILE FOR YESTERDAY....................27 W AT 1:35 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.................26 W AT 1:38 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................23 W AT 1:45 P.M. AVERAGE WIND SPEED AND DIRECTION.............13.8 WNW ASOS......................12.8 DAVIS.....................12.1 W [270 degrees] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE.............-0.15 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.98 DEPARTURE.............-2.00 ASOS..............0.97 TOTAL PRECIPITATION FOR THE YEAR..........42.90 DEPARTURE.............+0.84 ASOS..............N/A* *ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 2013 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust RMY: RMY = R.M. Young wind gust recording system added 8/9/2011 TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 10/1 75/50/63/+6/0.00/676/96 16 WNW AERO 16 MPH WNW RMY 18 10/2 78/56/67/+10/0.00/666/95 29 W AERO 30 MPH W RMY 29 10/3 77/56/67/+11/0.00/628/90 20 WNW AERO 20 MPH WNW RMY N/A 10/4 67/56/62/+6/0.26/028/04 18 NW AERO 20 MPH NW RMY N/A 10/5 67/56/62/+6/0.01/125/18 14 ENE AERO 12 MPH ENE RMY N/A 10/6 58/53/56/+1/0.56/000/00 20 NE AERO 20 MPH NE RMY N/A 10/7 75/57/66/+11/0.07/213/31 48 S AERO 55 MPH S RMY 55 10/8 65/50/58/+4/0.00/581/85 25 NW AERO 27 MPH NW RMY 28 10/9 59/49/54/0/0.00/545/80 25 ENE AERO 24 MPH ENE RMY 25 10/10 61/46/54/0/0.00/095/14 18 NE AERO 17 MPH NE RMY 18 10/11 67/50/59/+6/0.00/473/70 20 NE AERO 20 MPH NE RMY N/A 10/12 59/50/55/+2/0.02/007/01 30 ENE AER0 31 MPH ENE RMY 32 10/13 59/46/53/0/0.00/482/72 23 ENE AERO 23 MPH ENE RMY 23 10/14 64/42/53/+1/0.00/580/87 15 SSW AERO 15 MPH SSW RMY 15 10/15 66/50/58/+6/0.00/266/40 16 ESE AERO 16 MPH ESE RMY N/A 10/16 60/49/55/+4/0.00/013/02 23 ESE AERO 24 MPH ESE RMY 23 10/17 70/52/61/+10/0.06/.../.. 21 S AERO 23 MPH S RMY N/A 10/18 67/50/59/+8/0.00/.../.. 32 WNW AERO 32 MPH W RMY 31 10/19 65/45/55/+5/0.00/.../.. 21 W AERO 22 MPH W RMY N/A 10/20 61/44/53/+3/0.00/.../.. 33 W AERO 36 MPH W RMY 34 10/21 morning low temp: 43F; the normal low is now 41F DAILY RECORDS FOR OCTOBER 2013 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 21 HIGH 79F IN 1979 LOW 24F IN 1974 PRECIP 2.39 INCHES IN 1944 SNOWFALL TRACE IN 1895,1907,1940 PEAK GUST 69e MPH S IN 1976 RECORDS FOR OCTOBER 22 HIGH 85F IN 1979 LOW 22F IN 1940 PRECIP 1.37 INCHES IN 1898 SNOWFALL TRACE IN 1969, 2010 PEAK GUST 67 MPH ESE IN 1988 TODAY'S REPORT PREPARED BY: Robert Skilling