DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 071927
SWODY1
SPC AC 071925

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0125 PM CST TUE JAN 07 2014

VALID 072000Z - 081200Z

...NO TSTM AREAS FORECAST...

NO CHANGES NEEDED...SEE PREVIOUS DISCUSSION.

..GRAMS.. 01/07/2014

.PREV DISCUSSION... /ISSUED 0939 AM CST TUE JAN 07 2014/

...SYNOPSIS/FORECAST...
PATTERN WILL CONTINUE TO DEAMPLIFY OVER THE CONUS THROUGH WED AS
DEEP VORTEX NOW CENTERED E OF HUDSON BAY RETREATS NWD INTO NRN
LABRADOR AND TRAILING VORT LOBE NOW EXTENDING S INTO THE MID-
ATLANTIC REGION SWEEPS RAPIDLY NE ACROSS THE CANADIAN MARITIMES.

EXPANSIVE AREA OF LARGELY SUBSIDENT POLAR/ARCTIC AIR IN WAKE OF ERN
NORTH AMERICAN VORTEX WILL MAINTAIN DRY AND/OR STABLE LOW-LVL
ENVIRONMENT UNFAVORABLE FOR THUNDER OVER MUCH OF THE NATION.
ALTHOUGH THE RISK FOR AN ADDITIONAL C-G LIGHTNING STRIKE OR TWO MAY
PERSIST THROUGH THIS AFTN IN ASSOCIATION WITH LAKE-EFFECT CONVECTIVE
PLUME DOWNSTREAM FROM LK ONT...INVERSION HEIGHTS SHOULD DECREASE
WITH TIME AS AFOREMENTIONED VORT LOBE MOVES BEYOND REGION. COUPLED
WITH AN EXPECTED GRADUAL DECREASE IN BOUNDARY LAYER LAPSE
RATES...PROSPECTS FOR APPRECIABLE LAKE-INDUCED THUNDER APPEAR
MINIMAL.

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