textproduct: Juneau

UPDATE

Aviation section updated for 18z taf issuance.

HYDROLOGY

Off and on showers will continue through mid week as a low in the NE Gulf sends waves of precipitation across the area. Looking towards the end of the week, the next organized system will push an atmospheric river into the panhandle late Thursday night through Friday. This system will bringing rounds of moderate to heavy rainfall and rapidly rising freezing levels for communities across the panhandle.

For the northern panhandle, current forecast rainfall amounts are around 1 to 2 inches, with locally higher amounts approaching 3 inches at higher terrain. This rainfall in combination with rapidly rising freezing levels around 2000 to 3000ft by Friday afternoon into the weekend. This rainfall in combination with rapidly rising freezing levels around 2000 to 3000ft through Friday afternoon will lead to localized flooding concerns like ponding on road ways and poor drainage due to snow blocking drains along and north of the Icy Strait Corridor, including but not limited to Juneau, Gustavus, Hoonah, Yakutat, Haines, and Skagway.

For the central and southern panhandle, current forecast rainfall amounts are around 2 to 4 inches, with locally higher amounts approaching 5 inches at higher terrain. This rainfall in combination with rapidly rising freezing levels around 3000 to 5000ft will lead to localized flooding concerns like rapid river rises on small streams, ponding on road ways and poor drainage due to snow blocking drains along and south of a line from Sitka to Angoon to Petersburg.

For all of the panhandle, any existing snowpack will become more dense and hard to move by Friday. Additionally, hard pack snow on driveways, parking lots, and sidewalks will become very icy. Preparations should begin for an expected rain on snow event going into the weekend. Stay tuned for further forecast updates on this system moving through the week.

AJK WATCHES/WARNINGS/ADVISORIES

PUBLIC...Winter Storm Watch from Friday morning through Saturday morning for AKZ318-319. Winter Weather Advisory from 9 PM this evening to 9 AM AKST Friday for AKZ320>322-325. Flood Watch from Friday morning through Saturday evening for AKZ320>332. High Wind Watch from Friday afternoon through late Friday night for AKZ328-330-332. MARINE...Gale Warning for PKZ036-641-642-644-651-652-662>664-671-672. Small Craft Advisory for PKZ022-034-053-643-661.