Port Alexander Tide Gauge at Port Alexander (MLLW datum)
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
Sender
Sent
- Upstream gauge unavailableDownstream gauge unavailableWarning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
Traces and Thresholds Click to turn on/off display
Observed (OBS) 06/18/2025 11:36 AM AKDTOfficial Forecast (FCST) 06/18/2025 8:41 AM AKDTCATEGORY STAGE 
Moderate Flooding 14.2 ft Minor Flooding 13.6 ft Action 13.2 ft Reliability of the Forecast: Forecast data shown here are guidance values only. Please refer to your local NWS office.
NOTE: Forecasts are issued routinely year-round.
Tide forecasts include only the astronomical forecast. Storm surge and wind affects may create conditions very different than this forecast. Please check your local Weather Forecast Office for storm-related departures.
Vertical Datum references a tidal datum (MLLW)...for more information see Tides and Currents.
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
Flood Impacts
- 14 - Flooding of the white telebphone building on the point (telephone outage) and gravel by waves onto the electric generator building.
- 13 - Skiffs on the beach can be lost, bulkhead erosion with wind waves.
Gauge Info
| Coordinates | 56.2467, -134.647 |
| RFC | APRFC |
| State | AK |
| WFO | AJK |
| County | Sitka |
| Data Provider(s) | |
| NOAA National Ocean Service and Meteorological Development Laboratory | NOAA NOS & MDL |
Gauge Location
Vertical Datum Table
| type | MLLW* |
|---|---|
| major Flooding | N/A |
| moderate Flooding | 14.20 ft |
| minor Flooding | 13.60 ft |
| action | 13.20 ft |
| Latest Value | 1.21 ft |
| Gauge Zero | 0.00 ft |
Gauge Photos
No Images Found
Probability Information
No Images Available
Unique Local Info
Vertical Datum references a tidal datum (MLLW), for more information see Tides and Currents.
Collaborative Agencies
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.