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June 1, 2012 - Severe Thunderstorms/Tornadoes Event


Kmlwx

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I would tend to agree, but if Mrs.J lives has an HOA they are probably against having it on the roof, or on the lawn.

You hit the nail on the head Joe. Some of us have restrictions that do not allow it to be put at the most optimal place. I am a backyard enthusiast not a pro. So far all my other readings are comparable with other backyard stations in my area. I will deal with the rain issue when I see how bad it is off. These things are movable and this is my first time doing this. I am not going to put it in my yard because our lawn company for the towns is horrible with personal property. And like I said I can mount it higher if needed.

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I'm not a severe wx guru so take my words with a block of salt. To me, today has potential as the upper flow is very diffluent at 250 with the location being between the left exit region of one jet streak and the right entrance region of another. That should supply plenty of synoptic scale lift. the location of the warm front should be a plus for providing horizontal vorticity. I guess the big question is daytime heating and the cloud cover. Still, it's a pretty dynamic system with a pretty good cold front and warm. somewhere near or just south of the triple point should be a prime location.

Is Ian home yet?

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I'm not a severe wx guru so take my words with a block of salt. To me, today has potential as the upper flow is very diffluent at 250 with the location being between the left exit region of one jet streak and the right entrance region of another. That should supply plenty of synoptic scale lift. the location of the warm front should be a plus for providing horizontal vorticity. I guess the big question is daytime heating and the cloud cover. Still, it's a pretty dynamic system with a pretty good cold front and warm. somewhere near or just south of the triple point should be a prime location.

Is Ian home yet?

Nope, he is in TX today I think

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I agree that things get awfully interesting with the actual front and strengthening wind fields late between 00z-06z W-E (from DC to PHL). The SREF sig tor probs are certainly noteworthy in this corridor during that time frame.

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I agree that things get awfully interesting with the actual front and strengthening wind fields late between 00z-06z W-E (from DC to PHL). The SREF sig tor probs are certainly noteworthy in this corridor during that time frame.

Bad time in terms of daytime heating though, no?

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Gonna agree. I'm sure they will lower that during the next update. Clouds are troublesome

The 10% seems way overdone given their text. Who knows.. SPC is awesome but certainly less so east of the apps. And before weenies flock I always said this was a big threat for the area.. Talking specixally tor threat.

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I agree that things get awfully interesting with the actual front and strengthening wind fields late between 00z-06z W-E (from DC to PHL). The SREF sig tor probs are certainly noteworthy in this corridor during that time frame.

Also noted that with the 12z NAM Skew-Ts in the area with a secondary SBCAPE spike and SRH increase in both 1km and 0-3km

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The 10% seems way overdone given their text. Who knows.. SPC is awesome but certainly less so east of the apps. And before weenies flock I always said this was a big threat for the area.. Talking specixally tor threat.

I don't think anywhere here thought tornadoes was our biggest threat. Wind and hail mainly, at least that was my thinking.

If the WF can't get north, some of us will only be getting a gusty squall line

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I don't hope for tornadoes but think it would be funny and ironic if it cleared enough for chasing a storm in this area.

I wish everyone lots of luck and never want to miss storms. But we'll prob be under supercells on the caprock later.

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Bad time in terms of daytime heating though, no?

I should say so since that is true of any day of the year. :P

The second round (and for some of us the only round) with the cold/occluded front will have autumn-like dynamics at play. This combined with the moist boundary layer and some modest CAPE from theta-e advection will likely continue the QLCS straight to the Delaware Valley in some fashion.

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I don't think anywhere here thought tornadoes was our biggest threat. Wind and hail mainly, at least that was my thinking.

If the WF can't get north, some of us will only be getting a gusty squall line

For us tornadoes are rarely the prime threat but I wouldn't be surprised to see isold tornado or two somewhere in the mid atlantic.

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Also noted that with the 12z NAM Skew-Ts in the area with a secondary SBCAPE spike and SRH increase in both 1km and 0-3km

This may mean very little to the current situation but in past events in the autumn with these type of ingredients (strong kinematics/synoptic lift, low LCL and weak CAPE) typically bring a forced linear convective system with embedded supercells in the moist boundary layer, occasionally surface-based. If the CAPE is sufficient, it can bring scattered tornadoes.

The autumn of 2003 was like that up my way in NJ.

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For us tornadoes are rarely the prime threat but I wouldn't be surprised to see isold tornado or two somewhere in the mid atlantic.

I can see that happening if an area gets decent heating and a nice discrete cell before the main line comes through

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updated LWX discussion

.NEAR TERM /THROUGH TONIGHT/...

-- Changed Discussion --

COMPLICATED SYNOPTIC PATTERN THIS MORNING. LOW PRESSURE CENTER CURRENTLY LOCATED OVER THE CENTRAL OHIO VALLEY...WITH A STRONG COLD FRONT STRETCHING SOUTHWARD TO THE LOWER MISSISSIPPI RIVER VALLEY. A PRE-FRONTAL TROUGH IS LOCATED ACROSS SOUTH CENTRAL VA. A WARM FRONT IS DRAPED ACROSS THE NE CWFA CLOSE TO THE MASON DIXON LINE. REGIONAL RADAR LOOP SHOWS SOME PRECIP ACROSS NE MD ASSOCIATED WITH THE WARM FRONT. ADDITIONAL PRECIP ACROSS THE SOUTHERN CWFA ASSOCIATED WITH THE PRE-FRONTAL TROUGH. WIDESPREAD AREA OF PRECIP ALONG AND AHEAD OF THE COLD FRONT FROM THE CENTRAL OHIO VALLEY INTO WESTERN PA AND CENTRAL W VA. SKIES ARE MOSTLY CLOUDY/CLOUDY ACROSS THE CWFA. HOWEVER...TEMPS CONTINUE TO RISE INTO THE MIDDLE 70S ACROSS MUCH OF THE AREA TO LOWER 80S ACROSS LOWER SOUTHERN MARYLAND. NO CHANGE TO THE CURRENT MAX TEMP FORECAST...BUT TEMPS COULD BE SLIGHTLY HIGHER WHERE BREAKS IN THE CLOUDS OCCUR. AREA OF CLEARING ACROSS NORTH CAROLINA/SOUTHERN VIRGINIA SHOULD CONTINUE TO SPREAD NORTHWARD...AND AREAS EAST OF THE BLUE RIDGE COULD GO PARTLY CLOUDY BY THE MID AFTERNOON...THUS INCREASING THE INSTABILITY. DO THINK MULTICELLULAR CLUSTERS WILL BE LIKELY ALONG THE PRE-FRONTAL SURFACE TROUGH THIS AFTERNOON...WITH A LINEAR STRUCTURE EXPECTED ALONG THE COLD FRONT LATER THIS EVENING. NICE INVERTED V MODIFIED SOUNDING SHOWS THE POTENTIAL FOR DAMAGING WIND GUSTS WITH ANY CONVECTION THAT DEVELOPS. ISOLATED TORNADOES WILL BE MORE LIKELY WITH THE QLCS LINE ALONG THE COLD FRONT THIS EVENING. QLCS FEATURES ARE CLIMATOLOGICALLY FAVORED EAST OF THE BLUE RIDGE...AND ONLY MINIMAL INSTABILITY IS NECESSARY. SO...STRONG/SEVERE THUNDERSTORMS WILL CONTINUE TO BE POSSIBLE EVEN WITH THE LOSS OF HEATING. THUNDERSTORMS ASSOCIATED WITH THE PRE-FRONTAL TROUGH ARE EXPECTED DURING THE MID AFTERNOON...AFTER 2 PM. THE LINE ALONG THE FRONTAL BOUNDARY SHOULD BEGIN IMPACTING THE WESTERN CWFA AROUND 5 TO 6 PM...CROSSING THE BLUE RIDGE AROUND 7 TO 8 PM...AND FINALLY EAST OF THE CWFA BETWEEN 10 AND MIDNIGHT. PWATS HAVE DOUBLED FROM LAST NIGHTS SOUNDING TO AROUND 1.5 INCHES. THUNDERSTORMS WILL BE CAPABLE OF PRODUCING HEAVY RAINFALL. WITH ACTIVITY EXPECTED ALONG THE PRE-FRONTAL TROUGH AND THE COLD FRONT...FLASH FLOODING WILL BE POSSIBLE WHERE STORMS REPEATEDLY MOVE ACROSS. IN ADDITION...AREAS THAT HAVE RECEIVED HEAVY RAINFALL IN THE LAST WEEK OR SO...IE DC...PRINCE WILLIAM...WESTERN MARYLAND AND PORTIONS OF THE WEST VIRGINIA PANHANDLE WILL BE EVEN MORE SUSCEPTIBLE TO FLASH FLOODING.

-- End Changed Discussion --

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