A strong upper-level low pressure system will deepen over the Mid-South on Thursday night while a strong cold front approaches the Appalachians Friday morning. Heavy rain, with embedded strong thunderstorms are likely pre-dawn Friday through the early afternoon hours.
We will have to monitor a strong squall line with the potential for damaging wind gusts along the cold front on Friday.
From June to March:
The North Atlantic Oscillation will be sliding into its negative phase (see red lines in chart above) over the next several days indicative of strong upper-level blocking (ridge of high pressure) across the north Atlantic ocean.
Result: This will allow for a highly amplified jet stream with unseasonably chilly air to infiltrate the eastern third of the nation. It will certainly feel more like late March than early May across the Mid-Atlantic, the Great Lakes & New England this weekend through the following work week!
Highs may struggle to reach 60 degrees with lows in the 40s across the Washington Region this weekend continuing through much of next week!