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2015 Severe Weather Thread


Hvward

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I'm interested to see how today plays out because with the lack of storms south of raleigh yesterday the atmosphere is already starting out with >2000 Sb cape and skies are clear there today as well where as yesterday there were  overcast skies for a good portion of the morning.

 

Yes, a lot more sun and already more humid here this morning than it was yesterday morning. Maybe that will help increase the coverage of storms.

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This morning's HWO from Raleigh

.DAY ONE...TODAY AND TONIGHT.ABOVE NORMAL HEAT AND HUMIDITY WILL CONTINUE TODAY. STRONGTHUNDERSTORMS WILL AGAIN BE POSSIBLE...MAINLY DURING THEAFTERNOON AND EVENING..DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE SATURDAYAFTERNOON AHEAD OF A COLD FRONT. LARGE HAIL...DAMAGING WINDS...ANDISOLATED TORNADOES ARE POSSIBLE.
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In Raleighs discussion they mention cape being held down to 1000 because advection of dry air but in Wilmington's discussion they state a tropical like airmass will continue over the region haha we'll see tho because cape is already high, that dying complex over the mountains may be what we need to help get storms going later on today.

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Cool vid, downeast!

How can you tell positive lightening strikes from negative ones?

Positive strikes typcially originate much higher in the cloud and transfer positive energy to the ground. Whereas negative bolts generate and transfer negative energy to the ground. Positive bolts only account for around 15% of total strikes but generate 10-15 times more energy when they strike. So positive bolts come from much higher in the cloud and pack a much stronger punch when they strike.
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The storm over Harnett last night literally sprang up in a matter of minutes. Look like two boundaries collided near Angier and popped up. I'm not as optimistic for storms tonight as I am for Saturday. Things could get rollicking by early evening, depending on the trough's advancing.

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I am not so sure what today will hold, but tomorrow does look much better as the SLP moves through the Ohio Valley and a front ( a real front) moves through with the airmass becoming extremely unstable in front of it......

 

PWATS are way down over western NC ( ironic since they have the elevated risk per SPC versus us in the east) but its early and that can change but I would think with all the left over boundries etc from yesterday that it wont take long to see new development today once we get good heating going.....cant see mcape staying under 1000 anywhere if the sun is out, dry air or not.

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Positive strikes typcially originate much higher in the cloud and transfer positive energy to the ground. Whereas negative bolts generate and transfer negative energy to the ground. Positive bolts only account for around 15% of total strikes but generate 10-15 times more energy when they strike. So positive bolts come from much higher in the cloud and pack a much stronger punch when they strike.

 

Thanks man.  Makes sense.

 

The negative ones always look sad, while the positive ones are smiling. 

 

 

Lol!

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Latest SPC...

ELSEWHERE ACROSS THE NATION...THE ONGOING FORECAST APPEARS ON TRACK.   A FEW SEVERE THUNDERSTORMS MAY AFFECT PARTS OF THE CENTRAL   APPALACHIANS INTO THE NC COAST THIS AFTERNOON...WITH LOCALLY   DAMAGING WINDS THE MAIN THREAT.
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Watch possibly incoming....

 

 

MESOSCALE DISCUSSION 1196
   NWS STORM PREDICTION CENTER NORMAN OK
   0229 PM CDT FRI JUN 26 2015

   AREAS AFFECTED...MUCH OF CNTRL AND ERN NC

   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

   VALID 261929Z - 262130Z

   PROBABILITY OF WATCH ISSUANCE...60 PERCENT

   SUMMARY...AT LEAST ISOLATED SEVERE HAIL AND WIND ARE LIKELY TO
   DEVELOP OVER THE NEXT FEW HOURS MAINLY OVER NC.

   DISCUSSION...A STRONGLY UNSTABLE AIR MASS HAS DEVELOPED OVER NC NEAR
   A WEAK LOW-PRESSURE TROUGH. WEAK STORMS AND TCU ARE RAPIDLY
   DEVELOPING OVER CNTRL NC...AND SHOULD BECOME STRONG TO SEVERE OVER
   THE NEXT 1-2 HOURS. WEAK LOW-LEVEL NELY WINDS BENEATH MODEST WLY
   FLOW ALOFT IS RESULTING SUFFICIENTLY LONG HODOGRAPHS TO SUPPORT
   LONG-LIVED CELLULAR ACTIVITY...IN ADDITION TO A FEW SMALL BOWING
   SEGMENTS WITH TIME. THEREFORE...HAIL AND WIND BOTH APPEAR
   POSSIBLE...AND A WATCH IS BEING CONSIDERED.

   ..JEWELL/HART.. 06/26/2015

 

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