This morning was odd. Walking outdoors at 7 AM right here is Seattle, it was noticeably hotter than the earlier afternoon.
And moist. Almost tropical.
The moisture over us now had streamed northward out of the tropics throughout Hawaii after which north and westward, as proven by the water vapor picture proven beneath (for 7 PM tonight). The lighter colours signifies extra water vapor. We are situated underneath the pink star, and in case you look intently you possibly can see the swirl of water vapor into an intense low stress heart to our Northwest.
A satellite tv for pc picture of complete water vapor content material within the vertical (beneath) reveals the reservoir of moist air over the tropics (learn and purple colours) and the tendrils of moisture shifting north…..one among them in the direction of pink. Such moisture pathways are referred to as atmospheric rivers. And when they’re compelled to rise by our mountains, heavy precipitation happens.
Temperatures immediately rose into the mid-60s immediately over Puget Sound and round 70F within the Portland space, whereas the dew points–a good measure of water vapor content–got to close 60F. All underneath typically cloudy circumstances.
We didn’t want the solar to heat immediately; as a substitute robust southerly circulation introduced in heat air from the southwest.
Tonight is a really windy night time as a deep low stress heart passes to the north and a chilly entrance extending from the low approaches Washington State. Below is an official NWS evaluation (prime) and a mannequin simulation (backside) for four PM and 10 PM PST, respectively, that reveals the state of affairs. The present of heat air from the south is especially robust in entrance o of the chilly front–and that’s what we’re experiencing tonight.
Winds are gusting to 40-50 mph round Puget Sound proper now, and there are already some energy outages.
Enjoy the warmth–it will not final. This weekend the atmospheric configuration will change and chilly air from the north will dominate. Today would be the final time you take pleasure in highs within the 60s for the rest of the 12 months.