Tuesday 8 a.m.
When the temperature reaches a high or low reading that is higher or lower than any previous temperature on record for that date, a new record is established. When the weather is truly extreme, records set during that period represent a high bar for subsequent record attempts. Take Boston, for example. In 1881, the temperatures soared to 102 degrees there on Sept. 7. That's the highest reading for any day in September, and it came later than the other two 100-degree days in September, the 2nd and 3rd in 1953. On the low end, before today, the record low for this date (Sept. 17) in Boston was 45 set in 1986; 45 degrees represents the highest record low for any date in the last half of September, so we could say it was vulnerable. This morning, the temperature dropped to 44 degrees at Logan International Airport (symbol BOS), setting a new record. The record high for the date is 91, set in 1915.
The year 1915 (as does any year before 1923) raises an issue about where the official Boston records are and were kept. The Boston airport was first used for landings on June 13, 1923. In 1927, Colonial Air (a predecessor to American Airlines) started the first commercial service between New York City and Boston). Until Logan was established as the official record keeping site for Boston, the weather records were kept at a city location (as was the case in many cities before airports came into existence). This raises the question of how representative various records are because they may have been taken at changed locations with different characteristics.
Here is today's video forecast:
Looking at the tropics, there is activity, but most of it so far has not affected the U.S. mainland. The H storm, Humberto, is in the east-central Atlantic and has not been well organized. In 1989 on this date, the H storm was Hugo, and it was a monster that roared ashore in South Carolina days later. In 1954, the H storm was Hazel in mid-October. The storm came inland at Myrtle Beach, S.C., and was still strong enough to knock down thousands of trees in Pennsylvania as it sped northward.
There is an area of disturbed weather near the Bahamas, and it may strengthen. A new storm could also form in the southwest Gulf of Mexico and replace Ingrid. This map shows the arrangement of features in the Atlantic basin as of early the morning.
Looking ahead to <strong>next</strong> weekend, the Mothers Day Weekend, we see quite a difference between the GFS model and European models on where cold Canadian air is heading at 2 a.m. Sunday.
Rain is spreading across the Middle Atlantic states today. Dampness will linger from southern New York state to Virginia tomorrow even as the main rain area moves offshore.
For the rest of the week and this weekend, the upper-air "steering winds" will be arranged in two separate streams. The northern branch will send air from central Canada toward New England.
In the Northeast today, the low pressure area shown on this map will move to the East Coast today, pulling the front south as a cold front. Showers and gusty thunderstorm will affect areas south of the front while steady rain and gray skies are common to the north...
This map shows predicted temperatures for 2 p.m. ET today. This is about two hours before the daily high temperature is often reached. Note how close the chilly and warm air masses are to each other in the Northeast and eastern Canada.
Tomorrow is the anniversary of the birth (in 1564) and death (1616) of William Shakespeare. For this weekend, we expect no Tempest in the Hamlets of the Northeast because no Merchant of Menace will be nearby.