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Week of June 10th Heavy Rain and Thunderstorms Discussion


IsentropicLift

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Then again if the warm front clears the area then we would be in the tornado risk zone so it could be the case of either heavy rain with wind or severe weather, tornado risk and damaging winds.

On the nam it looks like the front stays right over LI. The warm sector closes off just a little too soon. We are right on the border of the real severe stuff

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So we have the NAM vs the Euro, one model has shown a different solution every run for the past 12 runs. One model has shown the same solution more or less over and over again. Go with the Euro. Warm fronts are always slow to advance.

How did the Euro do with the rain events last Friday and yesterday?

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Then again if the warm front clears the area then we would be in the tornado risk zone so it could be the case of either heavy rain with wind or severe weather, tornado risk and damaging winds.

On the 4k NAM it would be an initial tonrado risk with the warm front and then straight line wind damage with the cold front. The NAM has shown no consistency however.

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So we have the NAM vs the Euro, one model has shown a different solution every run for the past 12 runs. One model has shown the same solution more or less over and over again. Go with the Euro. Warm fronts are always slow to advance.

Yea still have to go with the EURO but like I said with this type of energy I think the warm front really blasts north. Just like the torch does in the winter.

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Upton:

 

IN TERMS OF IMPACTS...A CONSENSUS TRACK OF INTENSIFYING LOW PRESSURE TRACKING JUST SOUTH OF THE REGION WOULD SPELL A HEAVY RAIN AND WIND EVENT THU INTO THU NIGHT. BASED ON CURRENT STORM TRACK...THE HIGHER PROBABILITY FOR SEVERE WEATHER WOULD BE TO THE SOUTH OF OUR REGION. IF THE LOW WERE TO TRACK OVER OR TO THE NORTH OF THE REGION...THE SEVERE WEATHER THREAT WOULD LIFT INTO OUR AREA...BUT THIS IS A LOW PROBABILITY AT THIS TIME.

STRONG SYNOPTIC/FRONTOGENETIC FORCING POINT TOWARDS MODERATE TO HEAVY STRATIFORM RAIN AND EMBEDDED TSTM ACTIVITY THU INTO THU NIGHT. THE EXACT AXIS OF HEAVIEST RAIN IS A BIT UNCERTAIN...BUT WITH RECENT HEAVY RAIN EVENTS...ADDITIONAL HEAVY RAIN WOULD LEND TO WIDESPREAD URBAN AND SMALL STREAM FLOODING. SEE HYDROLOGY SECTION FOR MORE. IN ADDITION TOT HE HEAVY RAIN...EASTERLY WINDS COULD APPROACH WIND ADVISORY CRITERIA LEVELS THU INTO THU NIGHT ALONG THE COAST. WITH SATURATED GROUNDS THIS COULD LEAD TO DOWNING OF SOME TREES. THE STRONG EASTERLY WINDS WILL ALSO POSE A LOW THREAT FOR MINOR COASTAL FLOODING. MONITOR SUBSEQUENT FORECAST FOR THE LATEST.

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Upton:

 

IN TERMS OF IMPACTS...A CONSENSUS TRACK OF INTENSIFYING LOW PRESSURE TRACKING JUST SOUTH OF THE REGION WOULD SPELL A HEAVY RAIN AND WIND EVENT THU INTO THU NIGHT. BASED ON CURRENT STORM TRACK...THE HIGHER PROBABILITY FOR SEVERE WEATHER WOULD BE TO THE SOUTH OF OUR REGION. IF THE LOW WERE TO TRACK OVER OR TO THE NORTH OF THE REGION...THE SEVERE WEATHER THREAT WOULD LIFT INTO OUR AREA...BUT THIS IS A LOW PROBABILITY AT THIS TIME.

STRONG SYNOPTIC/FRONTOGENETIC FORCING POINT TOWARDS MODERATE TO HEAVY STRATIFORM RAIN AND EMBEDDED TSTM ACTIVITY THU INTO THU NIGHT. THE EXACT AXIS OF HEAVIEST RAIN IS A BIT UNCERTAIN...BUT WITH RECENT HEAVY RAIN EVENTS...ADDITIONAL HEAVY RAIN WOULD LEND TO WIDESPREAD URBAN AND SMALL STREAM FLOODING. SEE HYDROLOGY SECTION FOR MORE. IN ADDITION TOT HE HEAVY RAIN...EASTERLY WINDS COULD APPROACH WIND ADVISORY CRITERIA LEVELS THU INTO THU NIGHT ALONG THE COAST. WITH SATURATED GROUNDS THIS COULD LEAD TO DOWNING OF SOME TREES. THE STRONG EASTERLY WINDS WILL ALSO POSE A LOW THREAT FOR MINOR COASTAL FLOODING. MONITOR SUBSEQUENT FORECAST FOR THE LATEST.

Upton may want to take a look at the NAM.  Yes, it has been inconsistent, but it could be on to a trend.

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Mount Holly:

 

NUMERICAL GUIDANCE HAS CONTINUED TO TREND TOWARD A STRONGER/WETTER SYSTEM AND ENHANCED WORDING FOR BOTH STRONG WINDS AND HEAVY RAINS HAS BEEN PUT IN THE FORECAST. THERE IS A GROWING POTENTIAL FOR BOTH CONSIDERABLE SEVERE WEATHER ACTIVITY AND CONSIDERABLE FLASH AND RIVER FLOODING ACTIVITY WITH THIS SYSTEM. THE UPDATED HAZARDOUS WEATHER OUTLOOK WILL REFLECT THIS LATEST THINKING.

 

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Ummmm yeah, so who said no severe threat Thursday?

 

 

You're claiming a severe threat based on a simulated radar map? My god, I thought this sh*t only happened in the winter. 

 

You'll get an elevated storm threat and nothing more if the NAM verifies. Surface based instability is still nonexistent. 

 

http://climate.cod.edu/data/forecast/NAM/18/NE/namNE_con_sbcape_051.gif

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The GFS is slightly better for a severe threat into Central NJ. Good instability near and/or just south of the warm front which is loaded with helicity and in a favorable environment for some spinups. 

Which model do you favor?

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Asked in the mid-Atlantic thread but since you guys are also heavily tracking.. when's the last time we had a strengthening and fairly deep low passing thru the region like this in the warm season and non tropical in origin? ;)

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