Storm Forecast
Valid: Thu 20 Dec 2007 06:00 to Fri 21 Dec 2007 06:00 UTC
Issued: Wed 19 Dec 2007 21:53
Forecaster: GATZEN

SYNOPSIS / DISCUSSION

Large high remains over Europe, while low geopotential over Mediterranean weakens. Rather stable air mass and cool/dry boundary-layer will limit potential for convection over most places, and significant thunderstorms are not forecast. West of the Iberian Peninsula, a cut-off low is present that advects moist maritime air mass northward. Some CAPE is expected to develop, and given forcing along a cold front reaching southern Portugal during the period, some thunderstorms are forecast. Vertical wind shear is expected to be rather weak and severe thunderstorms are not forecast.