Joe Boomgard-Zagrodnik
@joeboomzag.bsky.social
Pacific Northwest weather/climate forecasts. Website: theconvergencezone.com
Seattle still hasn't even been close to a frost this fall, but that may change in about 8 days. Arctic air is expected in the intermountain West, with some intrusion possible into the PNW.
About 2/3 of EPS members show at least some cold getting to Seattle, but a high impact event seems unlikely.
About 2/3 of EPS members show at least some cold getting to Seattle, but a high impact event seems unlikely.
November 21, 2025 at 8:04 PM
Seattle still hasn't even been close to a frost this fall, but that may change in about 8 days. Arctic air is expected in the intermountain West, with some intrusion possible into the PNW.
About 2/3 of EPS members show at least some cold getting to Seattle, but a high impact event seems unlikely.
About 2/3 of EPS members show at least some cold getting to Seattle, but a high impact event seems unlikely.
Storm rainfall totals for this atmospheric river have eclipsed an inch from Seattle southward. As usual the mountains are quite effective at ringing out additional moisture from these moist vapor streams.
It will be a bit windy this morning, peaking around 10-11 AM around Seattle.
It will be a bit windy this morning, peaking around 10-11 AM around Seattle.
November 1, 2025 at 3:55 PM
Storm rainfall totals for this atmospheric river have eclipsed an inch from Seattle southward. As usual the mountains are quite effective at ringing out additional moisture from these moist vapor streams.
It will be a bit windy this morning, peaking around 10-11 AM around Seattle.
It will be a bit windy this morning, peaking around 10-11 AM around Seattle.
You really couldn’t time this any worse for trick or treating if you tried…
October 31, 2025 at 7:23 PM
You really couldn’t time this any worse for trick or treating if you tried…
Friendly reminder to tell your kids that M&M packaging is not waterproof.
October 30, 2025 at 4:13 PM
Friendly reminder to tell your kids that M&M packaging is not waterproof.
Precipitation anomaly forecasts for the next two weeks look wet in the PNW.
A big part of this is another potent frontal system expected Friday — so trick or treating might be a repeat of last year for many.
A big part of this is another potent frontal system expected Friday — so trick or treating might be a repeat of last year for many.
October 27, 2025 at 9:43 PM
Precipitation anomaly forecasts for the next two weeks look wet in the PNW.
A big part of this is another potent frontal system expected Friday — so trick or treating might be a repeat of last year for many.
A big part of this is another potent frontal system expected Friday — so trick or treating might be a repeat of last year for many.
Low pressure center incoming. Winds will continue to pick up, peaking in the 9-11 pm range in the central Sound.
October 26, 2025 at 1:48 AM
Low pressure center incoming. Winds will continue to pick up, peaking in the 9-11 pm range in the central Sound.
Every fall there comes a time in the PNW when the firehose gets turned on. Let it be known that Friday October 24th will be the official firehose day of 2025.
October 23, 2025 at 3:59 PM
Every fall there comes a time in the PNW when the firehose gets turned on. Let it be known that Friday October 24th will be the official firehose day of 2025.
Snowing at Longmire! Quite early for snow down to 3000 ft.
October 13, 2025 at 12:45 AM
Snowing at Longmire! Quite early for snow down to 3000 ft.
You can’t script it. The Mariners are willed to victory by Humpy the fish finally winning his first race in the middle of the 15th inning. The crowd chants “Humpy Humpy” as the trident crosses off the ALDS win.
October 11, 2025 at 5:48 AM
You can’t script it. The Mariners are willed to victory by Humpy the fish finally winning his first race in the middle of the 15th inning. The crowd chants “Humpy Humpy” as the trident crosses off the ALDS win.
I’ve never been this nervous for a sporting event before…GO M’s!!!
October 10, 2025 at 11:47 PM
I’ve never been this nervous for a sporting event before…GO M’s!!!
HRRR forecast for 4 pm in Detroit shows some lingering showers. Nothing too heavy. A few hours later it is completely clear. So a delay is possible but the Mariners will play today. (hopefully we get a delay to start the game later!)
October 7, 2025 at 1:43 PM
HRRR forecast for 4 pm in Detroit shows some lingering showers. Nothing too heavy. A few hours later it is completely clear. So a delay is possible but the Mariners will play today. (hopefully we get a delay to start the game later!)
That was undoubtedly my favorite Tuesday night baseball game of all time.
September 24, 2025 at 5:29 AM
That was undoubtedly my favorite Tuesday night baseball game of all time.
Dangerous fire weather conditions are expected Tuesday afternoon on the western slopes of the Cascades, especially in areas prone to gap winds (Enumclaw, I-90 corridor, US-2 corridor). We are lucky there are no ongoing fires in this area, but any new starts have the potential to spread rapidly.
September 15, 2025 at 8:56 PM
Dangerous fire weather conditions are expected Tuesday afternoon on the western slopes of the Cascades, especially in areas prone to gap winds (Enumclaw, I-90 corridor, US-2 corridor). We are lucky there are no ongoing fires in this area, but any new starts have the potential to spread rapidly.
Busy day of wildfires on satellite imagery. I count 6 smoke plumes in Washington and three more in southern BC.
September 2, 2025 at 11:06 PM
Busy day of wildfires on satellite imagery. I count 6 smoke plumes in Washington and three more in southern BC.
Hmm...I wonder what could be causing this???
August 15, 2025 at 9:59 PM
Hmm...I wonder what could be causing this???
The airmass currently over the Seattle area is near the all-time record for highest moisture content in terms of both integrated precipitable water and surface dew point.
There have only been a handful of observations at Sea-Tac airport around the current dew point of 65 F over the 80 year record.
There have only been a handful of observations at Sea-Tac airport around the current dew point of 65 F over the 80 year record.
August 15, 2025 at 9:54 PM
The airmass currently over the Seattle area is near the all-time record for highest moisture content in terms of both integrated precipitable water and surface dew point.
There have only been a handful of observations at Sea-Tac airport around the current dew point of 65 F over the 80 year record.
There have only been a handful of observations at Sea-Tac airport around the current dew point of 65 F over the 80 year record.
Let’s see if this video works…
August 15, 2025 at 7:19 PM
Let’s see if this video works…
Cool radar loop on the lee side of the Olympic Mtns showing a sharp edge to the rain shadow recovery. We’re likely seeing sharp upward motion associated with a mountain wave here, causing precip to rapidly reform. Maybe a bit of instability being released as well…
August 15, 2025 at 7:17 PM
Cool radar loop on the lee side of the Olympic Mtns showing a sharp edge to the rain shadow recovery. We’re likely seeing sharp upward motion associated with a mountain wave here, causing precip to rapidly reform. Maybe a bit of instability being released as well…
Smoke from the Bear Gulch fire is overspreading Seattle this evening. Considering the proximity of the fire we’ve been fortunate to mostly avoid the smoke. No such luck at the moment.
August 13, 2025 at 1:34 AM
Smoke from the Bear Gulch fire is overspreading Seattle this evening. Considering the proximity of the fire we’ve been fortunate to mostly avoid the smoke. No such luck at the moment.
~1 in 10 year event for mid-August. Which makes sense given the last August storm of this significance was probably 2015.
August 12, 2025 at 8:08 PM
~1 in 10 year event for mid-August. Which makes sense given the last August storm of this significance was probably 2015.
A rare summer atmospheric river is headed for the PNW on Fri-Sat.
After an unusually dry spring/summer, this is a highly beneficial event for drought stressed plants and reducing wildfire risk. Around 0.5-1.0" expected in WA lowlands, 1-3" in mountains.
Has been trending south in recent runs.
After an unusually dry spring/summer, this is a highly beneficial event for drought stressed plants and reducing wildfire risk. Around 0.5-1.0" expected in WA lowlands, 1-3" in mountains.
Has been trending south in recent runs.
August 11, 2025 at 9:42 PM
A rare summer atmospheric river is headed for the PNW on Fri-Sat.
After an unusually dry spring/summer, this is a highly beneficial event for drought stressed plants and reducing wildfire risk. Around 0.5-1.0" expected in WA lowlands, 1-3" in mountains.
Has been trending south in recent runs.
After an unusually dry spring/summer, this is a highly beneficial event for drought stressed plants and reducing wildfire risk. Around 0.5-1.0" expected in WA lowlands, 1-3" in mountains.
Has been trending south in recent runs.
Let it be known that '55 and drizzle' can happen any day of the year in Seattle.
July 25, 2025 at 3:25 PM
Let it be known that '55 and drizzle' can happen any day of the year in Seattle.
Couple pics from chasing hail with the ICECHIP project, this was Sun 6/22 in northeastern Nebraska. Not much of a hail producer but good eye candy.
June 24, 2025 at 3:51 PM
Couple pics from chasing hail with the ICECHIP project, this was Sun 6/22 in northeastern Nebraska. Not much of a hail producer but good eye candy.
Just 0.15" of rain in Seattle through the first half of May (monthly average = 1.88"). With steadier rain expected this evening through Saturday night (espec. in convergence zone), we should be closer to 1 inch on the month by Sunday evening. Not great for outdoor activities but we need the rain!
May 16, 2025 at 6:09 PM
Just 0.15" of rain in Seattle through the first half of May (monthly average = 1.88"). With steadier rain expected this evening through Saturday night (espec. in convergence zone), we should be closer to 1 inch on the month by Sunday evening. Not great for outdoor activities but we need the rain!
Happy Opening Day everyone!
March 28, 2025 at 2:27 AM
Happy Opening Day everyone!