National Weather Service United States Department of Commerce
spinner
Please wait while the page is loading
 
 
HYDROLOGY DATA VIEWER
Display:
Opacity:
 
Click on the hazard for more info
Display:
Opacity:
Loop:
Speed:
Time:
Display:
Elements:
Provider:
Density:
Hover for Information
Font:
Data Filters
Gust (mph):
Temp ( ° ):
Elev (ft):
RH (%):
Precip (in):
Data provided by Synoptic Data
Click on an observation for point info
Display:
Opacity:
 
For the DISPLAY options, click on a map-feature for more info

Toggle & Edit River Points
  • Use wand-star-tool (left) to edit circles
 
Major Flooding
Flood Category Not Defined
Moderate Flooding
Low Water Threshold
Minor Flooding
Observations Not Current
Near Flood Stage
Out of Service
No Flooding
 
Major Flooding
Flood Category Not Defined
Moderate Flooding
Low Water Threshold
Minor Flooding
Observations Not Current
Near Flood Stage
Out of Service
No Flooding
 
For the DISPLAY options, click on a map-feature for more info

Toggle & Edit Dam Locations
  • Use wand-star-tool (left) to edit circles
  • Click on a map-feature for more info

USACE
USBR
Opacity:
 
Toggle & Edit State Locations
  • Please be patient as data loads slowly
  • Use wand-star-tool (left) to edit circles
  • Click on a map-feature for more info

Colorado - Stream Gages
Colorado - Diversions
Colorado - Reservoirs
Display:
Opacity:
 
Click on the map displayed-layer for point info
Display:
Opacity:
 
Click on the map displayed-layer for point info
Display:
Opacity:
 
Click on the map displayed-layer for point info
Display:
Opacity:
 
Click on the map displayed-layer for point info
For Active Fires Indicents, click on a fire-icon for more info
 
Fires are considered active if ...
  • < 100% contained
  • Fire conditions have been updated the last 7 days
  • And whether the incident status summary via the ICS209 has been declared as either 'initial' or 'updated'

All Active Fires
Type 1 Incidents
Type 2 Incidents
Type 3 Incidents
Type 4 Incidents
Type 5 Indicents
Display:
Opacity:
Time:
Display:
Opacity:
 
Click on the map displayed-layer for point info
Display:
Opacity:
 
Click on the map displayed-layer for point info
Display:
Opacity:
 
Percent Chance of Exceedance of River Flood Levels.
Greatest flood risk plotted with respective chance of exceedance.
 
For the DISPLAY options, click on a map-feature for more info.

Toggle & Edit River Points
  • Use wand-star-tool (left) to edit circles.
 
Minor
Moderate
Major
Minor
Moderate
Major
Minor
Moderate
Major
Minor
Moderate
Major
Minor
Moderate
Major
Minor
Moderate
Major
Minor
Moderate
Major
Display:
Opacity:
 
Click on the map displayed-layer for point info
Display:
Opacity:
Display:
Opacity:
Display:
Opacity:
 
For Drought Monitor, Weekly Change, and Outlooks only.
Click on the map displayed-layer for point info.
Display:
Opacity:
 
Click on the map displayed-layer for point info
Display:
Opacity:
Display:
Opacity:
Boundaries - Political
US States
with labels
US Counties
with labels (fast)
with labels (slow, @15s)

Towns (0-10)
Towns (2500-5000)
Towns (10-25)
Towns (5000-10000)
Towns (25-50)
Towns (10000-25000)
Towns (50-100)
Towns (25000-50000)
Towns (100-250)
Towns (50000-100000)
Towns (250-500)
Towns (100000-250000)
Towns (500-1000)
Towns (250000-500000)
Towns (1000-2500)
Towns (> 500000)

U.S. Domestic Sovereign Nations: Land Areas of Federally-Recognized Tribes
Alaska Native Villages
Interstates
Boundaries - National Weather Service
NWS Forecast Offices
with labels

NWS Public Forecast Zones
NWS Marine Forecast Zones
Boundaries - River Forecast Centers
All River Forecast Centers
with labels

Arkansas Basin River Forecast Center
Alaskan River Forecast Center
Colorado Basin River Forecast Center
California-Nevada River Forecast Center
Lower Mississippi River Forecast Center
Mid-Atlantic River Forecast Center
Missouri Basin River Forecast Center
North-Central River Forecast Center
Northeast River Forecast Center
Northwest River Forecast Center
Ohio Basin River Forecast Center
Southeast River Forecast Center
Western Gulf River Forecast Center
Boundaries - RFC Forecast Groups & River Basins
Mississippi River Basin

Forecast Groups
ABRFC Forecast Groups
with labels
MBRFC Forecast Groups
with labels
NCRFC Forecast Groups
with labels
NERFC Forecast Groups
with labels
OHRFC Forecast Groups
with labels
SERFC Forecast Groups
with labels
WGRFC Forecast Groups
with labels

Forecast Basins
ABRFC Forecast Basins
with labels
MBRFC Forecast Basins
with labels
NCRFC Forecast Basins
with labels
NERFC Forecast Basins
with labels
WGRFC Forecast Basins
with labels
Boundaries - U.S. Army Corps of Engineers
USACE District Offices
USACE Field Offices
USACE Civil Works Districts
USACE Civil Works Divisions
USACE Regulatory Districts
USACE Military Districts
USACE Military Divisions
Boundaries - Hydrologic Unit Codes (HUC)
Region (2-Digit HUC)
with labels
Sub-Region (4-Digit HUC)
with labels
Basin (6-Digit HUC)
with labels
Sub-Basin (8-Digit HUC)
with labels
Boundaries - Burn Scars
Opacity:
 
For individual years, click on the burn areas for more info
Active fires & fire weather outlooks are under Forecast & Analysis
 
Historical Fire Perimeters
 
2024
2020
2016
2023
2019
2015
2022
2018
2014
2021
2017
2013
Boundaries - Rivers & Lakes
Rivers (with lables)
Rivers (with labels)
Rivers (no labels)
Rivers (no labels)
Lakes