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Hydrograph River at a Glance Download
Snohomish River near Monroe Stage (ft)Flow (kcfs)Highest Observation: 5.14 ft at 11:15AM Apr 29, 2024Highest Observation: 5.14 ft at 11:30AM Apr 29, 2024Highest Observation: 5.14 ft at 11:45AM Apr 29, 2024Observed: 5.12 ft at 12:00PM Apr 29, 2024Observed: 5.12 ft at 12:15PM Apr 29, 2024Observed: 5.11 ft at 12:30PM Apr 29, 2024Observed: 5.11 ft at 12:45PM Apr 29, 2024Observed: 5.1 ft at 1:00PM Apr 29, 2024Observed: 5.1 ft at 1:15PM Apr 29, 2024Observed: 5.09 ft at 1:30PM Apr 29, 2024Observed: 5.08 ft at 1:45PM Apr 29, 2024Observed: 5.07 ft at 2:00PM Apr 29, 2024Observed: 5.07 ft at 2:15PM Apr 29, 2024Observed: 5.05 ft at 2:30PM Apr 29, 2024Observed: 5.05 ft at 2:45PM Apr 29, 2024Observed: 5.04 ft at 3:00PM Apr 29, 2024Observed: 5.03 ft at 3:15PM Apr 29, 2024Observed: 5.02 ft at 3:30PM Apr 29, 2024Observed: 5.01 ft at 3:45PM Apr 29, 2024Observed: 5.01 ft at 4:00PM Apr 29, 2024Observed: 4.99 ft at 4:15PM Apr 29, 2024Observed: 4.99 ft at 4:30PM Apr 29, 2024Observed: 4.97 ft at 4:45PM Apr 29, 2024Observed: 4.96 ft at 5:00PM Apr 29, 2024Observed: 4.95 ft at 5:15PM Apr 29, 2024Observed: 4.94 ft at 5:30PM Apr 29, 2024Observed: 4.93 ft at 5:45PM Apr 29, 2024Observed: 4.93 ft at 6:00PM Apr 29, 2024Observed: 4.92 ft at 6:15PM Apr 29, 2024Observed: 4.9 ft at 6:30PM Apr 29, 2024Observed: 4.89 ft at 6:45PM Apr 29, 2024Observed: 4.89 ft at 7:00PM Apr 29, 2024Observed: 4.88 ft at 7:15PM Apr 29, 2024Observed: 4.87 ft at 7:30PM Apr 29, 2024Observed: 4.86 ft at 7:45PM Apr 29, 2024Observed: 4.86 ft at 8:00PM Apr 29, 2024Observed: 4.85 ft at 8:15PM Apr 29, 2024Observed: 4.84 ft at 8:30PM Apr 29, 2024Observed: 4.83 ft at 8:45PM Apr 29, 2024Observed: 4.83 ft at 9:00PM Apr 29, 2024Observed: 4.83 ft at 9:15PM Apr 29, 2024Observed: 4.82 ft at 9:30PM Apr 29, 2024Observed: 4.81 ft at 9:45PM Apr 29, 2024Observed: 4.8 ft at 10:00PM Apr 29, 2024Observed: 4.8 ft at 10:15PM Apr 29, 2024Observed: 4.79 ft at 10:30PM Apr 29, 2024Observed: 4.79 ft at 10:45PM Apr 29, 2024Observed: 4.78 ft at 11:00PM Apr 29, 2024Observed: 4.78 ft at 11:15PM Apr 29, 2024Observed: 4.77 ft at 11:30PM Apr 29, 2024Observed: 4.76 ft at 11:45PM Apr 29, 2024Observed: 4.75 ft at 12:00AM Apr 30, 2024Observed: 4.75 ft at 12:15AM Apr 30, 2024Observed: 4.75 ft at 12:30AM Apr 30, 2024Observed: 4.74 ft at 12:45AM Apr 30, 2024Observed: 4.73 ft at 1:00AM Apr 30, 2024Observed: 4.72 ft at 1:15AM Apr 30, 2024Observed: 4.71 ft at 1:30AM Apr 30, 2024Observed: 4.71 ft at 1:45AM Apr 30, 2024Observed: 4.7 ft at 2:00AM Apr 30, 2024Observed: 4.69 ft at 2:15AM Apr 30, 2024Observed: 4.69 ft at 2:30AM Apr 30, 2024Observed: 4.69 ft at 2:45AM Apr 30, 2024Observed: 4.67 ft at 3:00AM Apr 30, 2024Observed: 4.67 ft at 3:15AM Apr 30, 2024Observed: 4.66 ft at 3:30AM Apr 30, 2024Observed: 4.66 ft at 3:45AM Apr 30, 2024Observed: 4.65 ft at 4:00AM Apr 30, 2024Observed: 4.65 ft at 4:15AM Apr 30, 2024Observed: 4.64 ft at 4:30AM Apr 30, 2024Observed: 4.64 ft at 4:45AM Apr 30, 2024Observed: 4.63 ft at 5:00AM Apr 30, 2024Observed: 4.62 ft at 5:15AM Apr 30, 2024Observed: 4.62 ft at 5:30AM Apr 30, 2024Observed: 4.61 ft at 5:45AM Apr 30, 2024Observed: 4.6 ft at 6:00AM Apr 30, 2024Observed: 4.6 ft at 6:15AM Apr 30, 2024Observed: 4.59 ft at 6:30AM Apr 30, 2024Observed: 4.59 ft at 6:45AM Apr 30, 2024Observed: 4.58 ft at 7:00AM Apr 30, 2024Observed: 4.58 ft at 7:15AM Apr 30, 2024Observed: 4.57 ft at 7:30AM Apr 30, 2024Observed: 4.56 ft at 7:45AM Apr 30, 2024Observed: 4.56 ft at 8:00AM Apr 30, 2024Observed: 4.55 ft at 8:15AM Apr 30, 2024Observed: 4.55 ft at 8:30AM Apr 30, 2024Observed: 4.54 ft at 8:45AM Apr 30, 2024Observed: 4.53 ft at 9:00AM Apr 30, 2024Observed: 4.53 ft at 9:15AM Apr 30, 2024Observed: 4.52 ft at 9:30AM Apr 30, 2024Observed: 4.51 ft at 9:45AM Apr 30, 2024Observed: 4.5 ft at 10:00AM Apr 30, 2024Observed: 4.5 ft at 10:15AM Apr 30, 2024Observed: 4.49 ft at 10:30AM Apr 30, 2024Observed: 4.48 ft at 10:45AM Apr 30, 2024Observed: 4.47 ft at 11:00AM Apr 30, 2024Observed: 4.47 ft at 11:15AM Apr 30, 2024Observed: 4.46 ft at 11:30AM Apr 30, 2024Observed: 4.45 ft at 11:45AM Apr 30, 2024Observed: 4.44 ft at 12:00PM Apr 30, 2024Observed: 4.44 ft at 12:15PM Apr 30, 2024Observed: 4.44 ft at 12:30PM Apr 30, 2024Observed: 4.43 ft at 12:45PM Apr 30, 2024Observed: 4.43 ft at 1:00PM Apr 30, 2024Observed: 4.43 ft at 1:15PM Apr 30, 2024Observed: 4.42 ft at 1:30PM Apr 30, 2024Observed: 4.42 ft at 1:45PM Apr 30, 2024Observed: 4.42 ft at 2:00PM Apr 30, 2024Observed: 4.41 ft at 2:15PM Apr 30, 2024Observed: 4.41 ft at 2:30PM Apr 30, 2024Observed: 4.4 ft at 2:45PM Apr 30, 2024Observed: 4.4 ft at 3:00PM Apr 30, 2024Observed: 4.4 ft at 3:15PM Apr 30, 2024Observed: 4.4 ft at 3:30PM Apr 30, 2024Observed: 4.4 ft at 3:45PM Apr 30, 2024Observed: 4.39 ft at 4:00PM Apr 30, 2024Observed: 4.39 ft at 4:15PM Apr 30, 2024Observed: 4.39 ft at 4:30PM Apr 30, 2024Observed: 4.39 ft at 4:45PM Apr 30, 2024Observed: 4.39 ft at 5:00PM Apr 30, 2024Observed: 4.38 ft at 5:15PM Apr 30, 2024Observed: 4.38 ft at 5:30PM Apr 30, 2024Observed: 4.38 ft at 5:45PM Apr 30, 2024Observed: 4.37 ft at 6:00PM Apr 30, 2024Observed: 4.37 ft at 6:15PM Apr 30, 2024Observed: 4.36 ft at 6:30PM Apr 30, 2024Observed: 4.36 ft at 6:45PM Apr 30, 2024Observed: 4.35 ft at 7:00PM Apr 30, 2024Observed: 4.34 ft at 7:15PM Apr 30, 2024Observed: 4.34 ft at 7:30PM Apr 30, 2024Observed: 4.34 ft at 7:45PM Apr 30, 2024Observed: 4.33 ft at 8:00PM Apr 30, 2024Observed: 4.32 ft at 8:15PM Apr 30, 2024Observed: 4.31 ft at 8:30PM Apr 30, 2024Observed: 4.31 ft at 8:45PM Apr 30, 2024Observed: 4.3 ft at 9:00PM Apr 30, 2024Observed: 4.3 ft at 9:15PM Apr 30, 2024Observed: 4.29 ft at 9:30PM Apr 30, 2024Observed: 4.28 ft at 9:45PM Apr 30, 2024Observed: 4.28 ft at 10:00PM Apr 30, 2024Observed: 4.27 ft at 10:15PM Apr 30, 2024Observed: 4.27 ft at 10:30PM Apr 30, 2024Observed: 4.26 ft at 10:45PM Apr 30, 2024Observed: 4.25 ft at 11:00PM Apr 30, 2024Observed: 4.25 ft at 11:15PM Apr 30, 2024Observed: 4.24 ft at 11:30PM Apr 30, 2024Observed: 4.24 ft at 11:45PM Apr 30, 2024Observed: 4.23 ft at 12:00AM May 01, 2024Observed: 4.23 ft at 12:15AM May 01, 2024Observed: 4.22 ft at 12:30AM May 01, 2024Observed: 4.22 ft at 12:45AM May 01, 2024Observed: 4.21 ft at 1:00AM May 01, 2024Observed: 4.21 ft at 1:15AM May 01, 2024Observed: 4.21 ft at 1:30AM May 01, 2024Observed: 4.2 ft at 1:45AM May 01, 2024Observed: 4.2 ft at 2:00AM May 01, 2024Observed: 4.19 ft at 2:15AM May 01, 2024Observed: 4.19 ft at 2:30AM May 01, 2024Observed: 4.18 ft at 2:45AM May 01, 2024Observed: 4.18 ft at 3:00AM May 01, 2024Observed: 4.17 ft at 3:15AM May 01, 2024Observed: 4.16 ft at 3:30AM May 01, 2024Observed: 4.17 ft at 3:45AM May 01, 2024Observed: 4.16 ft at 4:00AM May 01, 2024Observed: 4.15 ft at 4:15AM May 01, 2024Observed: 4.15 ft at 4:30AM May 01, 2024Observed: 4.15 ft at 4:45AM May 01, 2024Observed: 4.14 ft at 5:00AM May 01, 2024Observed: 4.14 ft at 5:15AM May 01, 2024Observed: 4.14 ft at 5:30AM May 01, 2024Observed: 4.14 ft at 5:45AM May 01, 2024Observed: 4.13 ft at 6:00AM May 01, 2024Observed: 4.13 ft at 6:15AM May 01, 2024Observed: 4.12 ft at 6:30AM May 01, 2024Observed: 4.12 ft at 6:45AM May 01, 2024Observed: 4.11 ft at 7:00AM May 01, 2024Observed: 4.11 ft at 7:15AM May 01, 2024Observed: 4.11 ft at 7:30AM May 01, 2024Observed: 4.1 ft at 7:45AM May 01, 2024Observed: 4.1 ft at 8:00AM May 01, 2024Observed: 4.09 ft at 8:15AM May 01, 2024Observed: 4.09 ft at 8:30AM May 01, 2024Observed: 4.09 ft at 8:45AM May 01, 2024Observed: 4.08 ft at 9:00AM May 01, 2024Observed: 4.08 ft at 9:15AM May 01, 2024Observed: 4.07 ft at 9:30AM May 01, 2024Observed: 4.07 ft at 9:45AM May 01, 2024Observed: 4.07 ft at 10:00AM May 01, 2024Observed: 4.06 ft at 10:15AM May 01, 2024Observed: 4.05 ft at 10:30AM May 01, 2024Observed: 4.05 ft at 10:45AM May 01, 2024Observed: 4.04 ft at 11:00AM May 01, 2024Observed: 4.04 ft at 11:15AM May 01, 2024Observed: 4.03 ft at 11:30AM May 01, 2024Observed: 4.03 ft at 11:45AM May 01, 2024Observed: 4.02 ft at 12:00PM May 01, 2024Observed: 4.02 ft at 12:15PM May 01, 2024Observed: 4.01 ft at 12:30PM May 01, 2024Observed: 4.01 ft at 12:45PM May 01, 2024Observed: 4.01 ft at 1:00PM May 01, 2024Observed: 4.01 ft at 1:15PM May 01, 2024Observed: 4 ft at 1:30PM May 01, 2024Observed: 3.99 ft at 1:45PM May 01, 2024Observed: 3.99 ft at 2:00PM May 01, 2024Observed: 3.99 ft at 2:15PM May 01, 2024Observed: 3.98 ft at 2:30PM May 01, 2024Observed: 3.98 ft at 2:45PM May 01, 2024Observed: 3.97 ft at 3:00PM May 01, 2024Observed: 3.97 ft at 3:15PM May 01, 2024Observed: 3.96 ft at 3:30PM May 01, 2024Observed: 3.96 ft at 3:45PM May 01, 2024Observed: 3.96 ft at 4:00PM May 01, 2024Observed: 3.95 ft at 4:15PM May 01, 2024Observed: 3.94 ft at 4:30PM May 01, 2024Observed: 3.94 ft at 4:45PM May 01, 2024Observed: 3.93 ft at 5:00PM May 01, 2024Observed: 3.93 ft at 5:15PM May 01, 2024Observed: 3.92 ft at 5:30PM May 01, 2024Observed: 3.92 ft at 5:45PM May 01, 2024Observed: 3.92 ft at 6:00PM May 01, 2024Observed: 3.91 ft at 6:15PM May 01, 2024Observed: 3.91 ft at 6:30PM May 01, 2024Observed: 3.91 ft at 6:45PM May 01, 2024Observed: 3.9 ft at 7:00PM May 01, 2024Observed: 3.89 ft at 7:15PM May 01, 2024Observed: 3.89 ft at 7:30PM May 01, 2024Observed: 3.88 ft at 7:45PM May 01, 2024Observed: 3.88 ft at 8:00PM May 01, 2024Observed: 3.87 ft at 8:15PM May 01, 2024Observed: 3.87 ft at 8:30PM May 01, 2024Observed: 3.86 ft at 8:45PM May 01, 2024Observed: 3.86 ft at 9:00PM May 01, 2024Observed: 3.85 ft at 9:15PM May 01, 2024Observed: 3.84 ft at 9:30PM May 01, 2024Observed: 3.84 ft at 9:45PM May 01, 2024Observed: 3.83 ft at 10:00PM May 01, 2024Observed: 3.83 ft at 10:15PM May 01, 2024Observed: 3.83 ft at 10:30PM May 01, 2024Observed: 3.82 ft at 10:45PM May 01, 2024Observed: 3.82 ft at 11:00PM May 01, 2024Observed: 3.82 ft at 11:15PM May 01, 2024Observed: 3.81 ft at 11:30PM May 01, 2024Observed: 3.81 ft at 11:45PM May 01, 2024Observed: 3.81 ft at 12:00AM May 02, 2024Observed: 3.8 ft at 12:15AM May 02, 2024Observed: 3.79 ft at 12:30AM May 02, 2024Observed: 3.79 ft at 12:45AM May 02, 2024Observed: 3.78 ft at 1:00AM May 02, 2024Observed: 3.78 ft at 1:15AM May 02, 2024Observed: 3.77 ft at 1:30AM May 02, 2024Observed: 3.77 ft at 1:45AM May 02, 2024Observed: 3.77 ft at 2:00AM May 02, 2024Observed: 3.76 ft at 2:15AM May 02, 2024Observed: 3.76 ft at 2:30AM May 02, 2024Observed: 3.76 ft at 2:45AM May 02, 2024Observed: 3.75 ft at 3:00AM May 02, 2024Observed: 3.75 ft at 3:15AM May 02, 2024Observed: 3.75 ft at 3:30AM May 02, 2024Observed: 3.74 ft at 3:45AM May 02, 2024Observed: 3.74 ft at 4:00AM May 02, 2024Observed: 3.73 ft at 4:15AM May 02, 2024Observed: 3.72 ft at 4:30AM May 02, 2024Observed: 3.72 ft at 4:45AM May 02, 2024Observed: 3.72 ft at 5:00AM May 02, 2024Observed: 3.71 ft at 5:15AM May 02, 2024Observed: 3.71 ft at 5:30AM May 02, 2024Observed: 3.71 ft at 5:45AM May 02, 2024Observed: 3.7 ft at 6:00AM May 02, 2024Observed: 3.7 ft at 6:15AM May 02, 2024Observed: 3.69 ft at 6:30AM May 02, 2024Observed: 3.69 ft at 6:45AM May 02, 2024Observed: 3.69 ft at 7:00AM May 02, 2024Observed: 3.68 ft at 7:15AM May 02, 2024Observed: 3.68 ft at 7:30AM May 02, 2024Observed: 3.68 ft at 7:45AM May 02, 2024Observed: 3.67 ft at 8:00AM May 02, 2024Observed: 3.67 ft at 8:15AM May 02, 2024Observed: 3.66 ft at 8:30AM May 02, 2024Observed: 3.66 ft at 8:45AM May 02, 2024Observed: 3.66 ft at 9:00AM May 02, 2024Observed: 3.65 ft at 9:15AM May 02, 2024Observed: 3.65 ft at 9:30AM May 02, 2024Observed: 3.65 ft at 9:45AM May 02, 2024Observed: 3.65 ft at 10:00AM May 02, 2024Observed: 3.64 ft at 10:15AM May 02, 2024Forecast: 3.56 ft 5:00PM May 02, 2024Forecast: 3.49 ft 11:00PM May 02, 2024Forecast: 3.44 ft 5:00AM May 03, 2024Forecast: 3.43 ft 11:00AM May 03, 2024Forecast: 3.45 ft 5:00PM May 03, 2024Forecast: 3.47 ft 11:00PM May 03, 2024Forecast: 3.51 ft 5:00AM May 04, 2024Forecast: 3.63 ft 11:00AM May 04, 2024Forecast: 3.95 ft 5:00PM May 04, 2024Forecast: 4.68 ft 11:00PM May 04, 2024Forecast: 5.78 ft 5:00AM May 05, 2024Highest Forecast: 6.46 ft 11:00AM May 05, 2024Forecast: 6.4 ft 5:00PM May 05, 2024Forecast: 6.12 ft 11:00PM May 05, 2024Forecast: 5.97 ft 5:00AM May 06, 2024Forecast: 5.97 ft 11:00AM May 06, 2024Forecast: 6.02 ft 5:00PM May 06, 2024Forecast: 6.02 ft 11:00PM May 06, 2024Forecast: 5.99 ft 5:00AM May 07, 2024Forecast: 5.94 ft 11:00AM May 07, 2024Forecast: 5.85 ft 5:00PM May 07, 2024Forecast: 5.68 ft 11:00PM May 07, 2024Forecast: 5.46 ft 5:00AM May 08, 2024Forecast: 5.27 ft 11:00AM May 08, 2024Forecast: 5.11 ft 5:00PM May 08, 2024Forecast: 4.92 ft 11:00PM May 08, 2024Forecast: 4.71 ft 5:00AM May 09, 2024Forecast: 4.52 ft 11:00AM May 09, 2024USGS--Water Resources of the United StatesMROW1(plotting HGIRG) Graph Created (11:05AM May 2, 2024)ObservedForecast (issued 9:13AM May 2)Latest observed value: 3.64 ft at 10:15 AM PDT 2-May-2024. Flood Stage is 15 ft
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About this graph
Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: River forecasts for this location take into account past and future precipitation. The stages/flows that will occur may be different if future rainfall is different than forecast.

NOTE: Forecasts for the Snohomish River near Monroe are issued routinely year-round.

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Upstream Locations Upstream Gauge Downstream Gauge Downstream Gauge - at Snohomish
Flood Categories (in feet)
Major Flood Stage: 17
Moderate Flood Stage: 16
Flood Stage: 15
Action Stage: 10
Low Stage (in feet): -9999

Historic Crests
(1) 25.30 ft on 11/25/1990
(2) 24.12 ft on 01/08/2009
(3) 24.10 ft on 11/30/1995
(4) 23.54 ft on 11/07/2006
(5) 22.92 ft on 12/04/1975
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 16.38 ft on 12/06/2023 (P)
(2) 15.00 ft on 11/05/2022 (P)
(3) 15.07 ft on 03/01/2022 (P)
(4) 16.60 ft on 11/15/2021 (P)
(5) 15.82 ft on 11/13/2021 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.51 ft on 10/31/1987
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
22 the Snohomish River will cause severe flooding...with deep and swift flood waters inundating farm land...residential areas...and roads. Levees could suffer overtopping and major damage. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 22 feet at this location corresponds to Phase 4 in the Snohomish County Flood Warning System.
21 Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. The Snohomish River stage at this location corresponds to Phase 4 in the Snohomish County Flood Warning System.
20 the Snohomish River will cause severe flooding in the valley. The river will flood many homes...cover much of the farmlands...and close many roads. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 20 feet at this location corresponds to Phase 3 in the Snohomish County Flood Warning System.
17 the Snohomish River will cause major flooding...inundating farm land...roads...and some residential areas. Levees will likely suffer damage. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 17 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System.
16 the Snohomish River will flood several roads and much of the low pasture land in the river valley. A stage of 16 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System.
15 the Snohomish River will cause minor flooding of low pasture lands and several roads near the river. A stage of 15 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System.
14 feet...the Snohomish River will locally spill over its banks into low pasture lands along the river.
About This Location Collapse

Latitude: 47.831111° N, Longitude: 122.047222° W, Horizontal Datum: NAD27

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 15 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 13.25 ft 28.25 ft Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:
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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.
NWS Information
National Weather Service
Seattle Weather Forecast Office
7600 Sandpoint Way NE
Seattle, WA 98115-6349
(206) 526-6087
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