Heavy Snow – Storm Prediction Center Mesoscale Discussion 2106

Storm Prediction Center Mesoscale Discussion 2106.

1155 AM CST WED NOV 07 2012

AREAS AFFECTED…PARTS OF THE TRI-STATE AREA OF CT/NY/NJ – CONCERNING…HEAVY SNOW – VALID 071755Z – 072100Z

SUMMARY…A BAND OF MODERATE TO LOCALLY HEAVY SNOW SHOULD PERSIST THROUGH ABOUT 20-21Z WITH RATES APPROACHING 1 IN/HR. OTHERWISE…A BROADER TRANSITION TO SNOW IS EXPECTED WITH RATES NOT EXPECTED TO REACH 1 IN/HR.

DISCUSSION…METARS CONFIRM MODERATE TO LOCALLY HEAVY SNOW ASSOCIATED WITH A BAND OF ENHANCED RADAR REFLECTIVITY FROM NEAR NYC TO HARTFORD. THIS APPEARS TO BE LOCATED ALONG THE EDGE OF THE 850-700 MB JET AND ASSOCIATED FRONTOGENETICAL FORCING. GUIDANCE IS CONSISTENT THAT THIS ASCENT WILL WANE SOMEWHAT DURING THE AFTERNOON. THIS WILL LIKELY MITIGATE AN APPRECIABLE INCREASE IN SNOWFALL INTENSITY DESPITE A TRANSITION TO SNOW OVER A BROADER AREA AS THE THERMODYNAMIC COLUMN COOLS AOB FREEZING. AS SUCH…SNOWFALL RATES SHOULD PEAK NEAR 1 IN/HR FROM NOW THROUGH ABOUT 20-21Z.

Nor’easter will be No Sandy – November 4 2012

The Nor’easter expected to impact areas of the Mid-Atlantic and Northeast this week will be No Sandy. However due to earlier damage caused by Hurricane Sandy in these areas this storm will have a greater impact.

With that said, we can sill expect strong to gusty winds in areas from 40 to 50 mph which will hamper repair of downed power lines. Winds will also be capable of bringing down tress and branches already weakened from Sandy.

‘Minor to Moderate coastal flooding’ with the high tide around Midday Wednesday looking like the best time for storm surge. With many area beaches and coastal property already having erosion, it is likely this storm will add to this.

‘Rain amounts’ of up to 4 inches can be expected at this time in and around the areas closer to the coast with lesser amounts inland. Due to flooded areas which at this time have not receded any extra water will cause them to rise, and may also cause areas to flood again.

‘Snow will also be a concern’ on the backside of the counter clockwise flow around the storm. Areas likely to see snow at this time are inland in PA, NJ and NY maybe even as far south as VA; these areas ‘could’ see 1 to 4 inches maybe more. I think the New England area ‘could’ see 8 to 15 inches depending on storm path. Uncertainty remains at this time in this as we are still days away form this storm impacting the northeast and the final path is unknown, whether it will hug the coast or be farther away.

Projected Path of Nor’easter Tuesday November 6 thru Friday November 9 2012 and Forecast Rain amounts Nov 4 thru Nov 9 2012

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#Sandy Makes Landfall October 29 2012 – Graphics

Sandy has made landfall as an Extratropical storm on the southern tip of New Jersey near Cape May and Ocean city. At landfall Sandy had Sustained winds of 90 mph and a central pressure of 940mb. Tropical Storm Force and Hurricane Force winds were felt for many hours. The National Hurricane Center has Sandy as a Post-Tropical Cyclone making landfall at 8:00 PM EDT Monday, October 29 2012 with winds of 80 mph and a central pressure of 946 located at 39.4N 74.5W. and moving WNW AT 23 MPH .[see note at bottom of post]

Below is the ONLY graphic from the Hurricane center of Sandy before landfall at 5:00 PM EDT Monday, October 29 2012. There is not a graphic at landfall at 8:00 PM EDT. Notice the location on the graphic 38.8N 74.4W and moving WNW at 28 mph as compared to the location at landfall from above 39.4N 74.5W. and moving WNW AT 23 MPH.

So the storm was moving at 23 mph at landfall, a decrease of 2 mph from the 5 pm report. Yet it took according to the Hurricane center 3 hours from the 5 pm report to make landfall at 8 pm, moving less than 34.4 miles at 23 miles and hour. Where as at 23 mph X 3 hours would have moved it 69 miles. I contend Hurricane Sandy made landfall between 6:15 and 6:30 pm as reported to my followers here, on facebook, and twitter as an Extratropical storm. Apples and Oranges, I know.

Here are Satellite images of Sandy During landfall from 6:15 PM EDT, 7:45 PM EDT and 8:15 PM EDT.

Sandy SAT 615 pm EDT 102912

Sandy SAT 745 pm EDT 102912

Sandy SAT 815 pm EDT 102912

Note – Landfall : The intersection of the surface center of a tropical cyclone with a coastline. Because the strongest winds in a tropical cyclone are not located precisely at the center, it is possible for a cyclone’s strongest winds to be experienced over land even if landfall does not occur. Similarly, it is possible for a tropical cyclone to make landfall and have its strongest winds remain over the water. Compare direct hit, indirect hit, and strike. source – http://w1.weather.gov/glossary/index.php?letter=l

Many including myself thought from looking at data at the time that Hurricane Sandy made landfall between 6:15 and 6:30 PM EDT Monday October 29 2012; including some pro Mets. However the official time of landfall for Hurricane Sandy as released by the National Hurricane Center was at 8:00 PM EDT Monday October 29 2012. I will also point out that http://www.nhc.noaa.gov/aboutgloss.shtml#l the National Hurricane Center tells us the same thing as the first link above from weather.gov. …. Now from observations, Hurricane Sandy or as it was called at landfall, Post-Tropical Cyclone SANDY, made landfall after the WHOLE EYE was on land. Not the leading edge. Not the center. The complete eye, at 8 PM EDT Monday October 29 2012

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