Water-supply lake run by the San Jacinto River Authority · USGS station 08067600 · NWS gauge LCTT2
199.49 ft
water surface elevation (NGVD29), Oct 23, 2026 at 11:45 AM CDT
Water stored
391,000 acre-feet
Below NWS minor flood stage
12.5 ft
NWS action stage
209.0 ft
NWS minor flood stage
212.0 ft
Highest daily average since 1999
205.89 ft (August 28, 2017)
Lake Conroe is a water-supply lake, run by the San Jacinto River Authority. It is normally held near a steady level, rising after heavy rain and falling in dry spells.
Elevation is the height of the lake surface above NGVD29 (a fixed survey reference), not a water depth. Storage is USGS's estimate of the water held, in acre-feet (one acre-foot covers an acre a foot deep).
Active National Weather Service alerts for Harris County
Air Quality Alert — issued Oct 22, 2026 at 5:16 PM CDT, expires Oct 23, 2026 at 9:30 PM CDT. Air Quality Alert issued October 22 at 5:16PM CDT by NWS Houston/Galveston TX
Text as issued by NWS Houston/Galveston.
Last 7 days
USGS daily averages for the most recent days; hourly readings replace this once they start.
Highest level each year since 2000
Each dot is the highest USGS daily average of a water year (October to September); the hollow dot is this year so far. Dashed lines are NWS references. Hover a dot for its date.
NWS historic crests
Date
Crest
October 17, 1994
205.61 ft
May 22, 1983
204.66 ft
May 28, 2016
204.51 ft
November 13, 1998
204.21 ft
As published by the National Weather Service. They can differ slightly from USGS daily values: a crest is the single highest reading.
From USGS daily averages across each storm's window.
The county's reading
Lake Conroe (Harris County Flood Warning System site 43306): 199.50 ft at Oct 23, 2026 at 11:45 AM CDT; highest since October 21, 2026: 199.54 ft on Oct 21, 2026 at 12:30 PM CDT.
A separate instrument; small differences from USGS are normal.
Download
lake-conroe.csv (CSV): the USGS daily record for Lake Conroe, one row per day with the daily average elevation and daily average storage.
