Area Forecast Discussion
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
076 FXAK67 PAJK 211343 AFDAJK Southeast Alaska Forecast Discussion National Weather Service Juneau AK 543 AM AKDT Sat Sep 21 2019 .SHORT TERM...Low pressure over the northern Gulf is slowly creeping it`s way eastward toward the region which will continue to prompt rain through the region Saturday. While the heaviest of rainfall has ended, many locations can still anticipate at least another tenth to quarter of an inch of rain with some getting as much as an additional half inch. The heavy rain has prompted a few responses on area creeks, streams and rivers, most notably with the Taiya near Skagway currently being in moderate flood stage. The expectation is that this river will crest Saturday morning and drop below flood stage before the end of the day. A front that has made its way through most of the region that caused significant winds yesterday is still pushing through the southern panhandle as of Saturday morning. Many locations saw decreasing winds during the overnight hours with areas where the front is still passing through holding on to these higher speeds. Also of note is that a strong pressure gradient through Lynn Canal is also channeling some stronger winds through there and into Skagway and Haines. For the most part, these locations still being impacted by wind should see the speeds drop off over the course of the day. While not completely dry, many should see a break in the rain for Sunday before our next system begins it`s charge toward the region from the southwest. This system will begin bringing gale force winds to the open water areas and potentially to zone 52 by the end of the short term forecast period. Also likely is that the first push of precip from this system will be moving in late Sunday night/early Monday morning. .LONG TERM.../Monday through Saturday as of 10 pm Friday/ Models still casting about with system coming in for Mon-Tue period. Does look fairly energetic initially, but with upper jet dipping S of the area Mon, think the front that will come onshore will be weakening. Still, may have a low pressure wave or two to deal with during that time frame. Decided against changing the Mon-Wed time frame to allow for better model agreement on placement of potential significant low pressure waves. After that, models agree that ridging will build over the area, and this should diminish precip threat. May have a shortwave or two that might drop SE through the area, which could enhance winds and bring clouds in. Could have a burst of stronger northerly winds through the inner channels Thu/Fri than current forecast is showing. Later forecasts can adjust this as needed. Ended up using WPC to handle Thu onward to show more low level northerly flow. && .AJK Watches/Warnings/Advisories... PUBLIC...Areal Flood Advisory until 9 AM AKDT this morning for AKZ026. Areal Flood Advisory until 7 AM AKDT this morning for AKZ018. Areal Flood Warning until 1 PM AKDT this afternoon for AKZ018. Strong Wind until 10 AM AKDT this morning for AKZ018. MARINE...Small Craft Advisory for PKZ012-013-022-031>033-036-041>043- 051>053. && $$ JDR/RWT Visit us at http://www.weather.gov/Juneau

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.