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Severe Weather Threat May 7th - 13th


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RUC has a dot of 8000 SBCAPE near Galena later.

Would be a shame to waste this instability. Can probably count on one hand the number of days this year that will be like this. Still some hope for something firing later in vicinity of the front but it may be to my east.

No way, Iowa is good for about 5 of these days alone, around mid June!:guitar:

81/70 here..700mb temps near 12 degrees Celsius, cap shall hold.

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Im really curious to see what happens tomorrow with the dryline, triple point setup.

The 12z NAM has some really nice low-level shear further up the dryline closer to the sfc low with a 50kt LLJ and backed sfc winds east of the dryline at 0z in central KS but its also showing some big time heating directly behind the dryline into the low 90's with only low-mid 60 dews points on the dryline in KS/OK

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LSX's AFD discounted the GFS and GGEM developing convection because they said 70 degree dewpoints shown on those models were unrealistic. Guess what? Prairie du Chien's dewpoint is 71. It seems the temperatures and dewpoints are rising quicker than expected in areas that are actually seeing sun. Here, by the lake, we are seeing very little sun so far.

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Impressive SPC meso page today, some good weather pr0n capping or not.

SBCapes all the up to 5000..insanely tight gradient! According to the meso page, with an area of weakening cin that caught my eye.

post-193-0-17901400-1305049247.gif

FWIW- HRRR initiates development just east of where the area of weakening CIN is now.

cref_t2sfc_f07.png

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I think initiation is about to occur in MN based on visible satellite imagery. Lots of CAPE across the area, with a >5000 J/kg CAPE axis centered SW of here.

It is very close to going around here..Numerous towers going up then quickly dying due to the warm mid levels.

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May 11th---

at the dryline in Oklahoma and Texas tomorrow:

There is going to be 30-40 knots of deep layer shear

with 100-250 m2/s2 of helicity

1000-2500 J/kg of CAPE

Storm Prediction Center--- MODERATE RISK

This is part of their 1730z discussion for tomorrow.

...CENTRAL/SRN PLAINS...
  MOST SIGNIFICANT/CONCENTRATED SVR POTENTIAL STILL APPEARS TO BE JUST
  AHEAD OF DRYLINE FROM NEAR SFC LOW SEWD AND SWD OVER OK AND PORTIONS
  CENTRAL TX...THOUGH SOME CAVEATS COMPLICATE POTENTIAL IN EACH OF
  THREE MAIN AREAS OUTLINED BELOW.  IN GENERAL...BROAD MOIST
  SECTOR...CHARACTERIZED BY MID-UPPER 60S AND LOW-70S SFC DEW POINTS
  AND INTENSIFYING BULK SHEAR...WILL FAVOR RATHER BROAD SVR TSTM
  POTENTIAL LIKELY ASSOCIATED WITH 3 PHASES...EACH WITH SOME SPATIAL
  OVERLAP...

please refer to the SPC web site to read their full discussion.

We may have to start a new thread about May 11th.

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I was expecting a watch to be issued for the coulee country up your way. Parameters including shear are favorable up there for initial supercells and then a possible mcs to slide se overnight.

I was thinking that was a possibility early today, but i think the caps holds and any action will be limited to a lone cell or two traveling ENE across the northwoods.

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I was thinking that was a possibility early today, but i think the caps holds and any action will be limited to a lone cell or two traveling ENE across the northwoods.

What's interesting is that almost all of the potentially affected offices said or implied that they are discounting the possibility of an MCS forming and moving SE, but the Lincoln, IL office seems convinced it will occur.

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