MARCH 2019 MONTHLY WEATHER SUMMARY AND STATISTICS FOR WEST ROCKVILLE MARYLAND FOR THE NJWO BLOG

MARCH 2019 MONTHLY SUMMARY ROCKVILLE 2.8 WNW MARYLAND
by Kevin Shaw, Observer

March 2019 wound up about normal for temperatures (cooler than normal

max temps balanced out by warmer than normal min temps) based on new

normals for my station developed out of the Oregon State Univ. PRISM

program. My max temp (51.7°) was 1.8° below normal but my min temp

(35.1°) was 1.7° above normal, resulting in the mean temperature (43.4°)

to be normal. My total precipitation of 4.67″ was 0.93 above the newly

computed normal precipitation March value for my station of 3.74”.

Monthly total snowfall was 2.5”, bringing the seasonal total to 26.8”,

probably about normal for this time of the winter. Snow normals are
not computed by PRISM that I know of but I believe this March

amount was within normal amounts for the month.

There only one really cold day during the month (maximum on the 6th of

28.7°, minimum of 18.9°) for my only sub-freezing max for the month,

but the first 9 days of the month were generally colder than normal,

roughly averaging out with max temps in the upper 30s and min temps

in the upper 20s. All the monthly snowfall fell during this period. The

rest of the month was generally milder than normal including 3 days

with max temps up in the 70s.

There were 10 days with measurable precipitation, highlighted by the

monthly maximum of 2.40″ on the 21st, easily the wettest day of the

year so far accompanied by my monthly lowest pressure reading of

29.57” on that day and the 22nd as the storm bottomed out right

around midnight. The max snowfall for the month of 1.5” fell on the

1st. The wettest storm period of the month was on the 21st-22nd

when a total of 2.58” was recorded. With this very notable

exception most of the other precipitation during the month fell

during that cold period around the beginning of the month. The

highest barometric pressure reading of the month of 30.55”
on the 27th occurred during a dry period that lasted the rest

of the month after the big rain on the 21st. There were no

other really notable precipitation days during the month as all

other wet days were well under an inch daily.

The highest dew point temperature reached during the month was

62° on the 15th when I also recorded my warmest reading of the

month (75.6°). The lowest dew point temperature value was

reached on the 6th (coldest day of the month) when a value of

+5° was recorded.

March had 11 cloudy days, 12 partly cloudy days, and 8 clear/sunny

days. There were 671 heating degree days and 1 cooling degree day

during the month. There were 7 foggy days, 2 windy days, and 3

days with snowfall during the month.

Daily max/min temperatures varied a bit more than they did in

February. My maximum temperature frequencies included 3 days

over 70°, 5 days between 60° and 69°, 7 days between 50° and 59°,

9 days between 40° and 49°, 6 days between 30° and 39°, and 1 day

below 30°. On the minimum temperature frequency side of things,

there were 2 days below 20°, 5 days between 20° and 29°, 18 days

between 30° and 39°, 5 days between 40° and 49° and 2 days above

50°.

The coldest daily max temperature was 28.7° on the 6th while the

warmest daily min temp of 55.9° was on the 15th.

The diurnal range daily monthly average was 16.5° (- 3.6°). Our

greatest daily range of temperature was 33.1° on the 31st,

formed from a high of 66.1° and the low of 33.0°. We had a

total of 8 days with daily ranges above 20.0°. Our lowest

range of temperature was 5.2° (36.2°-31.0°) on the 1st

during our biggest snow of the month. There were 6 total

days with diurnal temperature ranges of less than 10.0°

throughout the month, mostly during the colder/wetter first

third of the month. It’s an interesting pattern to note that

the min range occurred on the first day of the month and the

max range occurred on the last day of the month.

March 2019 was a typical transitional month from winter to

spring, with patterns during the month filling the bill quite

well. No problems were experienced with my weather station

during the month thank goodness.

MARCH 2019 – ROCKVILLE 2.8 WNW MARYLAND –

SUMMARY STATISTICS

Average high temperature 51.7° (- 1.8°)
Average low temperature 35.1° (+ 1.7°)
Mean temperature 43.4° (+ 0.0°)

Precipitation 4.67″ (+0.93”)
Greatest daily amount (date) 2.40″ (21)
Greatest storm total (dates) 2.58” (21-22)
2019 year-to-date precipitation total 12.03″ (+2.63”)

Snowfall 2.5”
Greatest daily amount (date) 1.5″ (1)
Greatest storm total (dates) 1.5” (1)
Seasonal snowfall total 26.8″

High temperature for the month (date) 75.6° (15)
Low temperature for the month (date) 18.9° (6)

Highest barometric pressure (date) 30.55” (27)
Lowest barometric pressure (date) 29.57” (21,22)

Peak wind gust (date/direction): N/A

Heating degree days for the month: 671
Cooling degree days for the month: 1

Greatest diurnal range (date): 33.1° (31)
Least diurnal range (date) 5.2° (1)

Number of days:

Fog 7
Windy 2
Snow 3
Sleet 0
Glaze 0
Cloudy 11
Partly Cloudy 12
Sunny/Clear 8
Max temp ≥ 70° 3
Max temp =< 32° 1
Min temp =< 32° 8
Precip ≥ 0.01” 10

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About dabourphoto

Professional Photographer www.dabourphotography.com
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