Tuesday, February 18, 2014

| February 18, 2014 | Reply

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, FEBRUARY 18, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER ROUND OF SNOW BEGINS LATE MORNING TODAY
ADDING TO AN ALREADY SNOW-FILLED FEBRUARY.

Following a blue-bird day on Monday, high clouds moved
into the area last night, giving way to virga and eventually
light snow by 10 AM.

Temperatures were slowly on the increase today after Monday’s
average temperature of 18 degrees, 10 degrees below the daily
normal. Our overnight low was 12F gradually rising to 28F at
the 1 PM observation.

By noon snow picked up in intensity, with 0.6 inches recorded
at the 1 PM observation. Stay tuned to tomorrow’s summary for
storm totals and liquid water equivalents.

Today’s Observations:

7 A.M.
Weather: Overcast stratus, few cumulus distant offshore NNE-ESE,
virga distant S-WNW
Temperature: 20F; Dew Point: 9F; Wind: ESE at 9 kts,
Sea-level pressure: 30.30 ins. Hg, decreasing then more slowly
Visibility: 45 miles, thin fog distant NNW-ENE
6-hr min temp: 20F
6-hr max temp: 14F
Snow depth: 15 inches
BHO SA 1155 E100 OVC 45 260/20/9/1209/030/
FEW CU DSNT OFFSHR NNE-ESE THN FG DSNT NNW-ENE
VIRGA DSNT S-WNW/ 8/12/ 4/015 56012 10020 20014

10 A.M.
Weather: Light snow, overcast nimbostratus,
few altocumulus NE AND ESE
Temperature: 24F; Dew Point: 16F; Wind: ESE at 14G19 kts
Sea-level pressure: 30.22 ins. Hg, decreasing, then more quickly
Visibility: 40 miles, SW-ENE 40 miles, distant snow showers
BHO SA 1455 E50 OVC 40S- 233/24/16/1214G19/022/
S-B54 FEW AC NE AND ESE VSBY SW-ENE 30 MI/ 8/02/ 58027

1 P.M.
Weather: Moderate snow, fog
Temperature: 28F; Dew Point: 27F; Wind: ESE at 16G23 kts
Sea-level pressure: 30.07 ins. Hg, decreasing, then more quickly
Visibility: 1/8 of a mile, reduced by moderate snow and fog
6-hr max. temp: 28F
6-hr min. temp: 20F
BHO SA 1755 E6 OVC 1/8SF 184/28/27/1112G18/007/
NEW SNW PST 6 HRS 0.6 INS/ 8//// 58049 ASOS 60002 MANUAL 60002
10028 20020

WEATHER SUMMARY FOR MONDAY, FEBRUARY 17, 2014

TEMPERATURE (DEGREES F)
MAX…..27    NORMAL…..37
MIN……9    NORMAL…..19
MEAN….18    NORMAL…..28

DEPARTURE FROM 30-YEAR NORMAL……………………-10
TOTAL DEPARTURE FOR THE MONTH……………………-29 [-1.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..47  DEPARTURE………+10
TOTAL HEATING UNITS FOR THE MONTH………….676  DEPARTURE………+28
TOTAL HEATING UNITS FOR THE SEASON………..4179  DEPARTURE………+15
TOTAL HEATING UNITS LAST SEASON TO DATE……3762  DIFFERENCE…….+431

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………38 NW  AT 11:22 A.M.
AERO…………………..38 NW  AT 11:21 A.M. *
ASOS…………………..40 NW  AT 11:22 A.M.
DAVIS………………….38 WNW AT 11:21 A.M. RMY 41
FASTEST MILE FOR YESTERDAY………………..30 NW  AT  1:31 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..29 NW  AT  1:32 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….26 NW  AT 11:40 A.M.
AVERAGE WIND SPEED AND DIRECTION………….14.9 NW
ASOS………………….14.0
DAVIS…………………13.1 NW [311 deg.]
* last of several occurrences…

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……….4.47  DEPARTURE………….+2.11
ASOS…………..4.56
TOTAL PRECIPITATION FOR THE YEAR………..9.09  DEPARTURE………….+2.38
ASOS…………..9.47

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…………..-0.5
TOTAL SNOWFALL FOR THE MONTH……………27.9  DEPARTURE………….+19.5
TOTAL SNOWFALL FOR THE SEASON…………..76.7  DEPARTURE………….+35.2

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2014 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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

2/1  45/30/38/+12/0.00/0.0/402/67         24 S   AERO 23 MPH S   RMY 25
2/2  53/33/43/+17/0.00/0.0/181/30         22 S   AERO 21 MPH WNW RMY 21
2/3  36/22/29/+3/0.32/2.8/000/00          22 NNE AERO 18 MPH NNE RMY 21
2/4  33/18/26/0/0.00/0.0/377/62           20 NW  AERO 16 MPH NW  RMY 17
2/5  31/21/26/0/1.32/10.7/000/00          32 ENE AERO 30 MPH ENE RMY 30
2/6  26/15/21/-5/0.02/0.4/398/65          22 WNW AERO 21 MPH WNW RMY 22
2/7  29/13/21/-6/0.00/0.0/615/100         25 W   AERO 23 MPH W   RMY 27
2/8  28/12/20/-7/0.00/0.0/612/99          24 W   AERO 23 MPH W   RMY 23
2/9  28/19/24/-3/0.05/1.0/112/18          21 N   AERO 17 MPH N   RMY 19
2/10 27/14/21/-6/0.00/0.0/617/99          28 NW  AERO 28 MPH NW  RMY 30
2/11 24/8/16/-11/0.00/0.0/625/100         22 WNW AERO 20 MPH WNW RMY 25
2/12 25/2/14/-13/0.00/0.0/…/..          25 NNW AERO 23 MPH NW  RMY 21
2/13 33/19/26/-2/…./…/000/00          46 NE  AERO 51 MPH NE  RMY 51
2/14 34/27/31/+3/…./…/…/..          48 W   AERO 51 MPH WNW RMY 49
2/15 34/27/31/+3/…./…/…/..          35 NW  AERO 35 MPH NW  RMY 48
2/16 30/18/24/-4/…./…/…/..          45 NW  AERO 46 MPH NW  RMY N/A
2/17 27/9/18/-10/0.00/0.0/…/..          38 NW  AERO 38 MPH NW  RMY 41

2/18 morning low temp: 12F; the normal low is now 28F

DAILY RECORDS FOR FEBRUARY 2014
None so far.

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR FEBRUARY 18
HIGH 65F IN 1981
LOW -10F IN 1958
PRECIP 1.97 INCHES IN 1887
SNOWFALL 9.2 INCHES IN 1952
PEAK GUST 70 MPH S IN 2008

RECORDS FOR FEBRUARY 19
HIGH 66F IN 1981
LOW -5F IN 1923
PRECIP 2.73 INCHES IN 1972
SNOWFALL 12.0 INCHES IN 1893
PEAK GUST 76 MPH ENE IN 1972

TODAY’S REPORT PREPARED BY: Brian Fitzgerald

Category: Daily Discussions

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