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Here is Friday – June 22, 2018`s – Historical Climate Summary !

Lowest Barometric Pressure : 29.75″ at 3 a.m., 6 p.m.
Highest Barometric Pressure : 29.80″ at  11:59 p.m.

Lowest Relative Humidity : 55% at 3 […]

On May 27, 2018, training thunderstorms severely affected the Ellicott City area with torrential downpours over a short period of time, causing the historic downtown area to flood severely. Main Street turned into […]

Spreadsheet data file for May 2018:

2018-05-Rockville-2.8-WNW

MAY 2018 MONTHLY SUMMARY ROCKVILLE 2.8 WNW MARYLAND
By Kevin Shaw, Observer in Charge

May 2018 featured significantly above normal rainfall […]

Thursday was mostly cloudy, a tad cooler but still muggy, with a light AM shower between 1040 and 1105 (0.05″). Temperatures held mostly in the 70s all day. Overnight into Friday skies were cloudy, with temps only […]

Lowest Barometric Pressure : 29.75″ at 5 p.m.
Highest Barometric Pressure : 29.92″ at  12 a.m.

Lowest Relative Humidity : 59% at 3 p.m.
Highest Relative Humidity : 100% at 4, 6 – 8 a.m., 7, 11, 11:59 p.m. […]

Wednesday was partly cloudy, cooler and drier in the AM, but clouded over in the afternoon and light rain (daily total 0.31″) moved in during the evening (1935-2135), with a modest rain rate of 0.47″/hour @ 1957. […]

Lowest Barometric Pressure : 29.89″ at 6, 7 p.m.
Highest Barometric Pressure : 30.00″ at  9, 11 a.m.

Lowest Relative Humidity : 69% at 12 p.m.
Highest Relative Humidity : 100% at 11 p.m.

Lowest Dew Point […]

This is going to be real quick, but after a decent thunderstorm near The Dalles on Saturday and a big storm with outflow winds, for the Portland Metro on Sunday – today we’re going to have another good shot at […]

This is going to be real quick, but after a decent thunderstorm near The Dalles on Saturday and a big storm with outflow winds, for the Portland Metro on Sunday – today we’re going to have another good shot at […]

Tuesday featured several changes throughout the day. The morning after sunrise was sunny and hot, as the high air and dew point temperatures for the day were reached a few minutes prior to noon. The afternoon […]

Lowest Barometric Pressure : 29.98″ at 6 – 9 p.m.
Highest Barometric Pressure : 30.11″ at  9 a.m.

Lowest Relative Humidity : 47% at 2 p.m.
Highest Relative Humidity : 100% at 5 a.m.

Lowest Dew Point Tempe […]

It seems that the 90s are gone for a while and temperatures are back to where they should be.  That’s a relief.  I don’t do well at all when temps get much above 80°F.  We received a few showers late yesterday whi […]

Monday was a mostly to partly sunny, hazy, hot, humid day with clouds coming in during the later stages of the afternoon that put a lid on the increasing temperature. The clouds resulted from a line of storms […]

Here is Monday – June 18, 2018`s – Historical Climate Summary !

Lowest Barometric Pressure : 30.04″ at 7 p.m.
Highest Barometric Pressure : 30.17″ at  9, 10 a.m.

Lowest Relative Humidity : 46% at 3 p.m. […]

Yesterday was just too hot to even step outdoors with highs reaching 93°F.  Fortunately, thunderstorms will be passing through later today and bringing cooler air with it.  On the down side, there is a chance fo […]

Sunday was a mostly sunny but hazier day with high clouds at times esp in the AM, and a warmer, more humid day. Temperatures started out around 70° in the early AM then rose just short of 90° by mid-afternoon. O […]

Here is Sunday – June 17, 2018`s – Historical Climate Summary !

Lowest Barometric Pressure : 30.01″ at 3 a.m.
Highest Barometric Pressure : 30.11″ at  8, 9 a.m.

Lowest Relative Humidity : 52% at 2 – 5 p.m. […]

While my area is baking in 90° temperatures, heavy storms have wreaked havoc in Michigan’s Copper Country.  My daughter lived in Houghton for three years and I’m so happy that she isn’t there now.  I have at […]

Saturday was a mostly sunny, warm, and still a relatively comfortable day. Temperatures started out around 60° in the early AM then rose into the mid 80s by mid afternoon. Overnight into Sunday skies remained […]

Here is Saturday – June 16, 2018`s – Historical Climate Summary !

Lowest Barometric Pressure : 29.97″ at 6, 7 p.m.
Highest Barometric Pressure : 30.05″ at  8, 9 a.m.

Lowest Relative Humidity : 50% at 4 p. […]