BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, OCTOBER 24, 2007 
ALL TIMES ARE IN EASTERN STANDARD TIME
 
SOUTH AND SOUTH-SOUTHWEST WINDS GUSTED OVER 50 MPH YESTERDAY
HIGHEST WINDS SINCE THE MID-APRIL 2007 NOR'EASTER 
TEMPERATURES DROP OVERNIGHT WITH COLD FRONTAL PASSAGE
 
Wind gusts in a range of 52 to 55 MPH from the south and south-
west yesterday afternoon were our strongest winds since 15-17 April
big nor'easter when east winds gusted to 73 MPH and the daily
average reached 25.5 MPH on the 16th. Yesterday's average was 23.1
MPH from the south. In fact, since that storm the highest daily 
average had been only 17 MPH during the six-month period. 
 
Yesterday's gusts included: 
Aerovane 55 MPH
Maximum, Inc. Merlin 54 MPH
ASOS 53 MPH
420c 52 MPH
 
A cold front passed late last night just after midnight and 
the temperature dropped 6 degrees in a half hour. So the low 
temperature for the day occurred in the morning and that 
reading of 58 degrees tied the record high minimum for the
date set on October 23, 1942.  
 
Today's observations:
 
7 A.M.   
Weather: Low overcast stratus 
Temperature: 53F, Dew point: 50F, Wind: NNW at 10 kts 
Sea-level pressure: 29.87 inches Hg, rising 
Visibility: 75 miles, mountain in cloud 45 WNW, light drizzle SW
Visibility: SW 25 miles  
6-hour min temp: 53F
24-hour precipitation: 0.10  
BHO SA 1155 E15 OVC 75 115/53/50/3310/987/ FEW DSNT LWR STRA 
PCPN/DZ SW VSBY SW 25 MTN INCLD 45 WNW PTCH VIRGA DSNT NE/ 
8/6// 51037 ASOS 60005 ASOS 70010 MANUAL 6005/ 
MANUAL 70010 10062 20053  
 
10 A.M.   
Weather: Low overcast stratus, light drizzle  
Temperature: 67F, Dew point: 62F, Wind: S at 19G28 kts
Wind: Peak gust 35 kts S at 10 past the hour 
Sea-level pressure: 29.91 inches Hg, falling
Visibility:  
 
1 P.M. 
Weather: Overcast nimbostratus with scattered lower stratocumulus 
Temperature: 55F, Dew point: 50F, Wind: NE at 4 kts 
Wind: Light
Sea-level pressure: 29.93 inches Hg, steady
Visibility: 50 miles, mountain in cloud 45 WNW 
6-hour max. temp. 55F
6-hour precip: 0.01 inch  
BHO SA 1755 15 SCT E22 OVC 50 136/55/50/0504/993/ 15 SCT MDT CUFRM TOPS
MTN INCLD 45 WNW WND LGT/ 8/52/ 55000 MANUAL 6001/ 10055 20053 
 
WEATHER SUMMARY FOR TUESDAY, OCTOBER 23
 
TEMPERATURE (DEGREES F)
MAX.....74    NORMAL.....58 
MIN.....58    NORMAL.....41
MEAN....66    NORMAL.....49
DEPARTURE FROM 30-YEAR NORMAL.........+17 
TOTAL DEPARTURE FOR THE MONTH........+174 [+7.4 DEGREES/DAY]  
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............52 SSW AT 2:22 P.M.          
                   AEROVANE.............55 SSW AT 2:22 P.M.   
                   ASOS.................53 SSW AT 2:22 P.M.  
                   DAVIS................58 SSW AT 1:43 P.M.  
FASTEST MILE FOR YESTERDAY..............40 SSW AT 2:23 P.M.    
MAXIMUM 2-MINUTE ASOS AVERAGE...........40 SSW AT 1:44 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE..........42 SSW AT 2:23 P.M.  
AVERAGE WIND SPEED AND DIRECTION......23.1 S  
                   ASOS...............22.6 
                   DAVIS..............21.6 S [190 deg]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.10  DEPARTURE.....-0.04
                         ASOS..............0.10 
TOTAL PRECIPITATION FOR THE MONTH..........2.12  DEPARTURE.....-1.10  
                         ASOS..............2.14    
TOTAL PRECIPITATION FOR THE YEAR..........35.00  DEPARTURE.....-5.82
                         ASOS.............34.26  
 
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 2007...CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available
 
10/1  67/49/58/+1/0/592/84     18 S 
10/2  72/50/61/+5/0/323/46     20 SSE
10/3  73/61/67/+11/0/077/11    23 SSE
10/4  84/65/75/+19/0/425/61    21 SSW
10/5  86/61/74/+19/0/618/89    21 SSW 
10/6  83/62/73/+18/0/526/76    23 WSW
10/7  71/52/61/+7/0.01/110/16  29 NNE 
10/8  58/52/55/+1/0.49/000/00  21 S
10/9  59/50/55/+1/0.10/580/85  29 NNW
10/10 57/50/54/0/0.09/000/00   20 ESE
10/11 58/55/57/+4/0.37/000/00  33 ENE TSTM late evening 
10/12 62/42/52/-1/0.18/135/20  42 W   Aero 43 MPH W 
10/13 59/37/48/-4/0/665/99     25 WNW
10/14 59/42/51/-1/0/629/94     32 W 
10/15 62/38/50/-2/0/426/64     29 WNW   
10/16 61/43/52/+1/0/650/98     25 NW 
10/17 68/41/55/+4/0/462/70     20 SW
10/18 75/57/66/+15/0/.../..    21 S
10/19 70/63/67/+16/0.60/000/00 47 SSE Aero 51 MPH SSE
10/20 70/54/62/+12/0.19/.../.. 43 W   Aero 44 MPH W
10/21 73/51/62/+12/0/643/99    25 SSW 
10/22 80/58/69/+19/0/595/92    29 S 
10/23 74/58/66/+17/0.02/135/21 52 SSW  Aero 55 MPH SSW
 
10/24 morning low temp. 53F; normal low is now 40F
 
NEW DAILY RECORDS FOR OCTOBER 2007:
 
10/4 - RECORD HIGH TEMPERATURE 84F; PREVIOUS 83F IN 1898 and 1959.
     - EQUALED RECORD HIGH MINIMUM TEMPERATURE OF 65F; ALSO IN 1927. 
10/5 - RECORD HIGH TEMPERATURE 86F; PREVIOUS 85F IN 1922
10/6 - EQUALED RECORD HIGH TEMPERATURE 83F; ALSO IN 1990. 
10/19- EQUALED RECORD HIGH MINIMUM TEMPERATURE 63F; PREVIOUS IN 1928. 
10/23 -EQUALED RECORD HIGH MINIMUM TEMPERATURE 58F; ALSO IN 1942
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR OCTOBER 24
HIGH 79 IN 1963
LOW 22 IN 1969
PRECIP 2.96 INCHES IN 1890
SNOWFALL 1.8 INCHES IN 1960
PEAK GUST 70 MPH SE IN 1959
 
RECORDS FOR OCTOBER 25
HIGH 81 IN 1963
LOW 26 IN 1922,1939
PRECIP 2.45 INCHES IN 2005
SNOWFALL 1.2 INCHES IN 1960
PEAK GUST 72 MPH ESE IN 1980
 
TODAY'S REPORT PREPARED By: Robert Skilling