Rainfall WarningIssued at 5:30 AM NDT Thursday 13 March 2014
Rainfall amounts of 20 to 70 millimetres are expected today and tonight. This is a warning that significant rainfall is expected in these regions. Monitor weather conditions..listen for updated statements.Details
An intense low pressure system southwest of Nova Scotia will move to lie over the Gulf of St. Lawrence today before moving through the Strait of Belle Isle overnight tonight. For the Great Northern Peninsula: snow will begin early this morning and then change to ice pellets or freezing rain in the afternoon. Generally 15 centimetres of snowfall is anticipated followed by potentially significant amounts of freezing precipitation. The precipitation will taper off or end by Friday morning. For regions under a freezing rain warning: snow will change through ice pellets to freezing rain later this morning. Freezing rain may persist for several hours, especially in low-lying valley locations, before temperatures rise above zero allowing the precipitation to change to rain. For regions under a rainfall warning: snow will change through freezing rain to rain at times heavy later this morning. Total rainfall amounts of 20 to 50 millimetres can be expected across these regions before tapering off tonight, with amounts up to 70 millimetres possible from Burgeo to the Connaigre Peninsula. Warm temperatures combined with these rainfall amounts will lead to significant snow melt, creating a potential for localized flooding. Additionally, brisk southwesterly winds in the wake of the low will cause temperatures to quickly fall below freezing. This could potentially lead to flash freeze conditions overnight tonight into Friday morning for regions receiving rain and mild temperatures today. Furthermore, strong south to southeasterly winds ahead of this system will spread across the island during the day. Winds in the Wreckhouse area are expected to begin gusting over 100 km/h later this morning and then persist until this evening. Wind gusts reaching 130 km/h at times are expected to affect the area later this morning. Furthermore coastal gusts are forecast to reach 100 km/h along parts of the East Coast from Bonavista North to St. John's this afternoon into this evening.