Friday July 21st, 10:30am.. A cold front crossed the island early this morning with some showers and thundershowers. This front is now east of the island. A second even stronger cold front currently located along the St Lawrence River Valley. This front will sweep across the island later this afternoon giving showers and possible thundershowers. Some of these showers could be locally heavy. Cooler and dryer air floods in behind this front for the weekend as high pressure dominates. The beginning of next week remains unclear. A low pressure system begins to move eastward out of the lower Great Lakes Sunday night. Secondary low pressure then develops off the east coast vicinity Long Island. This secondary tracks eastward passing south of NS on Monday. The problem is that a couple of models track this system close to NS spreading cloud and a few showers while others keep it well south with no impact. The main low coming out of the Great Lakes moves slowly eastward passing south of NS late Tuesday into Wednesday with cloud and some rain. A ridge of high pressure crosses the region on Thursday and Friday with some sunshine.
Precipitation.. Few showers/thundershowers crossed the island this morning. Stanhope reported 10 mms but most places came in at generally less than 2 mms. Showers and thundershowers should redevelop by late this afternoon and continue into tomorrow morning. Some of these showers could be heavy giving locally significant amounts of rain. The weekend is looking dry. Monday should be cloudy but unclear if the rain will be spread across the region.
Temperatures.. Today is the last of the warm and muggies.. Cooler air floods in tomorrow and remains over the Maritimes through the end of next week. Just in time for my week’s holidays 😦
Wind.. Light SW winds today will shift to NW late this afternoon. Winds could be locally gusty in any thunderstorms today. Tomorrow morning-noon could see some local gusty NW winds for a few hours. NW-NE winds then continue into mid week.
Thunderstorms.. Chance of storms later today which continue into tomorrow morning. Some of these storms could bring locally heavy down pours. Also a threat of small hail and gusty winds. This stronger activity if it happens should occur late this afternoon or early this evening and will diminish as we loose the daytime heating.
Hazards.. Wet roads in any rain. Ponding of water on roads in the heavier showers. Possible lightning activity and gusty winds. Some storms could be locally strong.
Watches/warnings.. None for PEI at this time but will need to monitor the situation closely today for the possibility of strong thunderstorms which could prompt some watches/warnings. Remember “when thunder roars….Go indoors”.
Today.. Sunny becoming cloudy with chance of showers and thundershowers, light SW winds, highs muggy 26.
Tonight.. Cloudy with showers and chance of thundershowers, light-brisk NW winds, lows 14.
Tomorrow.. Showers ending early then clearing, Cloudy periods developing in the sunshine, light-brisk NW winds, highs 20.
Sunday..Sunny, light-brisk NW winds, highs 20
Monday.. Cloudy, chance of showers, light north winds, highs 19
Tuesday.. Cloudy, light east winds, 21
Wednesday.. Showers, 19