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May 1, 2013

DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, MAY 1, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME               A FEW PRELIMINARY APRIL 2013…

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DAILY DISCUSSION AND CLIMATE SUMMARY

WEDNESDAY, MAY 1, 2013

ALL TIMES ARE IN EASTERN STANDARD TIME

             

A FEW PRELIMINARY APRIL 2013 MONTHLY STATS

Additional stats to come next few days….

 

Temp: Deg. F

Av. Max. 58.1

Av. Min. 38.1

Mean     48.1 [+1.4]

Mean temp. corr. to 24 hours: 47.0

Highest 72 on 9th,19th,24th

Lowest  26 on 4th

Total heating degree day units:       503   [-48 ]

Total heating degree days for season: 5523  [-512 ]

Precipitation in inches

Total for April:        2.29

Departure from normal: -2.26

Snowfall:               trace

Departure from normal: -3.0

Av. wind speed: 13.3 MPH

Av. corrected wind speed: 13.7 MPH

Peak gust registered: 51 MPH S on 7th 

Prevailing direction: S 14%

 

Today’s observations:

 

7 A.M.

Weather: Clear, few cirrus mostly distant E-SE 

Temperature: 55F; Dew Point: 26F; Wind: NNE at 2 kts, estimated

Sea-level pressure: 30.33 ins. Hg, rising steadily

Visibility: 50 miles, except 30 miles N-ENE thin smoke layer along the

horizon S-W-N, smoke layer NNE-NE, distant haze, inversion dissipated

6-hour min. temp: 45F

BHO SA 1155 CLR 50 312/55/26/E0202/045/ FEW CI MSTLY DSNT E-SE

VSBY N-ENE 30 THN K LYR ALG HRZN S-W-N AND K LYR NNE-NE 

INVSN DSSPTD DSNT HZ ALQDS WND LGT/ 8/001 51012 10055 20045

 

10 A.M.

Weather: Clear, few small cumulus forming distant SE-S

Temperature: 63F; Dew Point: 22F; Wind: NNE at 7 kts,

Wind: Direction variable NNW-ENE

Sea-level pressure: 30.49 ins. Hg, rising then more slowly   

Visibility: 35 miles, except 50 miles WNW, dark smoke layer

estimated top 15 hundred feet NW and layer extending WNW-N,

both along and above horizon, distant haze all quadrants 

BHO SA 1455 CLR 35 326/62/27/0307/049/ FEW SML CU FRMG DSNT SE-S

DRK K LYR WNW-N ESTMTD MAX TOP 15 HND NW VSBY WNW 50 DSNT HZ ALQDS/

WND 33V07/ 8/100 51014

 

WEATHER SUMMARY FOR TUESDAY, APRIL 30

 

TEMPERATURE (DEGREES F)

MAX…..67     NORMAL…..61

MIN…..47     NORMAL…..43                         

MEAN….57     NORMAL…..52             

 

DEPARTURE FROM 30-YEAR NORMAL………………..+5

TOTAL DEPARTURE FOR THE MONTH……………….+46 [+1.2 DEGREES/DAY]

 

HEATING DEGREE DAYS 

TOTAL HEATING UNITS FOR YESTERDAY………….8   DEPARTURE……….-5

TOTAL HEATING UNITS FOR THE MONTH………..503   DEPARTURE………-48

TOTAL HEATING UNITS FOR THE SEASON………5523   DEPARTURE……..-512

TOTAL HEATING UNITS LAST SEASON TO DATE….4714   DIFFERENCE…….+809

 

PEAK GUST AND AVERAGE WIND SPEED (MPH)

PEAK WIND GUST FOR YESTERDAY……………23 ENE AT  2:07 P.M.   

                   AERO………………..21 ENE AT  2:07 P.M.   

                   ASOS………………..23 ENE AT  2:07 P.M.  

                   DAVIS……………….22 ENE AT  2:07 P.M. RMY: 23

THE FASTEST MILE FOR YESTERDAY………….16 ENE AT  2:08 P.M. 

MAXIMUM 2-MINUTE ASOS AVERAGE…………..16 ENE AT  2:08 P.M. 

MAXIMUM 2-MINUTE DAVIS AVERAGE………….16 ENE AT  2:07 P.M.    

AVERAGE WIND SPEED AND DIRECTION……….7.5 S

                   ASOS……………….7.3

                   DAVIS………………7.1 SSE [150 deg]

 

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 APRIL…………..2.29  DEPARTURE………..-2.26

                         ASOS…………..2.23

TOTAL PRECIPITATION FOR THE YEAR……….16.38  DEPARTURE………..-2.17

                         ASOS…………..N/A*

*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals

                       

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)

TOTAL SNOWFALL 24 HRS ENDING 7 A.M………0.0   DEPARTURE………… 0.0

TOTAL SNOWFALL FOR THE MONTH………….Trace   DEPARTURE…………-3.0

TOTAL SNOWFALL FOR THE SEASON………….99.0   DEPARTURE………..+36.3

 

PRELIMINARY CLIMATE SUMMARY FOR APRIL 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

 

4/1  61/31/46/+5/0.34/0.0/458/60     40 W   AERO 44 MPH WNW RMY 46  TSTM

4/2  40/27/34/-7/T/T/460/60          45 W   AERO 42 MPH W   RMY 47

4/3  45/27/36/-6/0.00/0.0/755/98     44 W   AERO 43 MPH W   RMY 47

4/4  55/26/41/-1/0.00/0.0/719/93     30 WSW AERO 27 MPH WSW RMY 31

4/5  59/36/48/+5/0.00/0.0/403/52     33 NNW AERO 28 MPH NNW RMY 38

4/6  47/30/39/-4/0.00/0.0/747/96     38 NW  AERO 35 MPH NW  RMY 40 

4/7  52/31/42/-1/0.00/0.0/391/50     51 S   AERO 46 MPH S   RMY 50

4/8  65/43/54/+10/T/0.0/494/63       29 SSW AERO 22 MPH SSW RMY N/A

4/9  72/44/58/+14/T/0.0/456/58       35 WNW AERO 35 MPH WNW RMY 39  TSTM

4/10 64/43/54/+9/0.13/0.0/426/54     23 SE  AERO 20 MPH SE  RMY 25

4/11 52/40/46/+1/0.09/0.0/063/08     18 ENE AERO 14 MPH ENE RMY N/A

4/12 40/34/37/-8/0.58/T/000/00       38 E   AERO 32 MPH E   RMY 41

4/13 52/34/43/-3/0.04/0.0/128/16     31 NNE AERO 27 MPH NNE RMY 21

4/14 52/36/44/-2/0.00/0.0/216/27     31 WNW AERO 27 MPH WNW RMY 32

4/15 55/35/45/-2/0.00/0.0/514/64     21 ESE AERO 15 MPH S   RMY N/A

4/16 62/38/50/+3/T/0.0/540/67        44 S   AERO 40 MPH S   RMY 45

4/17 67/48/58/+11/T/0.0/769/95       29 SSW AERO 25 MPH SSW RMY N/A

4/18 65/43/54/+6/0.00/0.0/503/62     30 S   AERO 25 MPH S   RMY N/A

4/19 72/50/61/+13/0.07/0.0/195/24    47 SSW AERO 48 MPH SSW RMY 50

4/20 62/39/51/+2/0.48/0.0/147/18     43 SSW AERO 41 MPH SSW RMY N/A

4/21 53/31/42/-7/0.00/0.0/819/100    31 WNW AERO 25 MPH WNW RMY N/A

4/22 49/35/42/-7/0.00/0.0/…/..     32 E   AERO 28 MPH E   RMY 33

4/23 40/38/39/-11/0.50/0.0/000/00   35 NNE AERO 30 MPH NNE RMY 35

4/24 72/40/56/+6/0.01/0.0/…/..     36 SSW AERO 33 MPH SSW RMY N/A

4/25 64/44/54/+4/0.05/0.0/…/..     38 W   AERO 32 MPH W   RMY N/A

4/26 58/42/50/-1/0.00/0.0/…/..     28 ENE AERO 22 MPH ENE RMY N/A 

4/27 62/42/52/+1/0.00/0.0/…/..     21 S   AERO 17 MPH S   RMY 22

4/28 69/44/57/+5/0.00/0.0/…/..     25 S   AERO 21 MPH S   RMY 27

4/29 69/46/58/+6/0.00/0.0/…/..     25 S   AERO 30 MPH S   RMY 26

4/30 67/47/57/+5/0.00/0.0/…/..     23 ENE AERO 21 MPH ENE RMY 23

 

5/1  morning low temp: 45F; the normal low is now 43F

 

DAILY RECORDS FOR APRIL 2013

None 

 

DAILY EXTREMES

Temperature and precipitation records back to 1885, and

wind records back to 1940 (e = estimated):

 

RECORDS FOR MAY 1

HIGH 87F IN 1899

LOW 29F IN 1978

PRECIP 2.53 INCHES IN 1921

SNOWFALL TRACE IN 1905,1917,1921,1995.

PEAK GUST 57 MPH NW IN 1974

 

RECORDS FOR MAY 2

HIGH 92F IN 2001

LOW 29F IN 1903

PRECIP 1.36 INCHES IN 2006

SNOWFALL 1.0 INS IN 1888

PEAK GUST 58 MPH S IN 1983

 

TODAY’S REPORT PREPARED BY: Robert Skilling

 

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Climate Summary from the Blue Hill Observatory, please

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Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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