Thursday, September 11, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, SEPTEMBER 11, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
MOSTLY CLOUDY BUT WITH WARMING TEMPERATURES AND WITH
INCREASING HUMIDITY AS SOUTH TO SOUTH-SOUTHWEST WINDS INCREASE
Warmer and more humid weather arrived today on increasing
S-SSW winds gusting past 30 MPH at times by this afternoon.
Temperatures have risen to the mid-70’s and dew points are
rising toward the mid-60’s.
September has been an exceptionally sunny and dry month so
far. There has been 79% of the possible sunshine through
9 days and 0.03 inch precipitation through 10 days.
Today’s Observations:
7 A.M.
Weather: Broken stratocumulus, overcast cirrus mostly thin,
few stratus fractus
Temperature: 63F; Dew Point: 60F; Wind: S at 12 kts,
Sea-level pressure: 29.96 ins. Hg, falling then more rapidly
Visibility: 10 miles, except 20 miles, WNW, thin fog
6-hr max temp: 63F
6-hr min temp: 60F
24-hr precip: 0.00
BHO SA 1155 E27 BKN 250 0VC 10 147/63/60/1812/996/ FEW STFRA
250 OVC MSTLY THN THN FG ALQDS VSBY WNW 20/ 8/501 58010 10063 20060
10 A.M.
Weather: Scattered stratocumulus, few stratus fractus, scattered
altocumulus, overcast altocumulus/altostratus
Temperature: 68F; Dew Point: 61F; Wind: S at 14 kts,
Wind: Gust to 21 kts past hour
Sea-level pressure: 29.91 ins. Hg, falling then more quickly
Visibility: 25 miles, hazy, except 20 miles WNW
BHO SA 1455 20 SCT 70 SCT E110 OVC 25 128/68/61/1814/991/ FEW STFRA
BRGHT STPS/SML BINOVC SE-S GST TO 21 KTS PST HR HAZY/ 8/57/ 58019
1 P.M.
Weather: Scattered stratus fractus, overcast stratocumulus, bright spots
in the overcast
Temperature: 75F; Dew Point: 63F; Wind: SSW at 17G23 kts,
Wind: Peak wind from SSW @ 27 KTS at 12:22 P.M. EST
Sea-level pressure: 29.85 ins. Hg, falling, then more slowly
Visibility: 20 miles, hazy
6-hr max. temp: 75F
6-hr min. temp: 63F
BHO SA 1755 25 SCT E30 OVC 20 109/75/63/2017G23/985/ BRGHT SPTS IOVC
HAZY PK WND 2027/22/ 8/5// 56019 10075 20063
WEATHER SUMMARY FOR WEDNESDAY, SEPTEMBER 10, 2014
TEMPERATURE (DEGREES F)
MAX…..71 NORMAL…..74
MIN…..58 NORMAL…..57
MEAN….65 NORMAL…..65
DEPARTURE FROM 30-YEAR NORMAL……………………..0
TOTAL DEPARTURE FOR THE MONTH……………………+65 [+6.3 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0 DEPARTURE………..-3
TOTAL COOLING UNITS FOR THE MONTH………….82 DEPARTURE……….+50
TOTAL COOLING UNITS FOR THE SEASON………..561 DEPARTURE………..-8
TOTAL COOLING UNITS LAST SEASON TO DATE……663 DIFFERENCE……..-102
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0 DEPARTURE……….-2
TOTAL HEATING UNITS FOR THE MONTH……………0 DEPARTURE………-17
TOTAL HEATING UNITS FOR THE SEASON…………..2 DEPARTURE………-40
TOTAL HEATING UNITS LAST SEASON TO DATE……..36 DIFFERENCE……..-34
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………23 NE AT 12:29 P.M.
ASOS…………………..23 NE AT 12:29 P.M.
DAVIS………………….18 NNE AT 12:29 P.M. RMY 20
FASTEST MILE FOR YESTERDAY………………..13 NE AT 12:33 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..15 ENE AT 12:40 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….13 NE AT 12:30 P.M.
AVERAGE WIND SPEED AND DIRECTION………….. 7.8 ENE
ASOS……………………8.3
DAVIS…………………. 7.0 NE [050 deg)
* last of several occurrences…
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……….-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR SEPTEMBER……….0.03 DEPARTURE……….-1.19
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE YEAR……….31.21 DEPARTURE……….-5.03
ASOS………….31.45
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY GUST
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
9/1 88/69/79/+11/0.00/710/90 16 W RMY 19
9/2 91/70/81/+13/0.00/495/63 24 S RMY 27 TSTM
9/3 83/67/75/+8/0.00/681/87 24 NW RMY 27
9/4 86/61/74/+7/0.00/758/97 20 SW RMY 22
9/5 89/66/78/+11/0.00/731/94 25 SSW RMY 29
9/6 90/67/79/+12/T//481/62 33 SSW RMY 36 TSTM
9/7 77/62/70/+4/0.03/687/89 26 NW RMY N/A
9/8 74/57/66/+0/0.00/601/78 25 ENE RMY 25
9/9 71/59/65/-1/0.00/384/50 23 ENE RMY 23
9/10 71/58/65/0/0.00/…/.. 20 NE RMY 20
9/11 morning low temp: 60F since midnight; normal low now 56F
DAILY RECORDS FOR SEPTEMBER 2014:
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR SEPTEMBER 11
HIGH 93F IN 1983, 2013
LOW 37F IN 1917
PRECIP 5.23 INCHES IN 1954 (HURRICANE EDNA)
PEAK GUST 101 MPH NW IN 1954 (HURRICANE EDNA)
RECORDS FOR SEPTEMBER 12
HIGH 92F IN 1961
LOW 42F IN 1958,1967,1985
PRECIP 2.79 INCHES IN 1960 (HURRICANE DONNA)
PEAK GUST 140 MPH SSE IN 1960 (HURRICANE DONNA)
TODAY’S REPORT PREPARED BY: Robert Skilling
