Tropical Storm Allison (2001): peak water levels
48 river and stream gauges and 5 tide gauges · Houston–Galveston · June 5, 2001 to June 14, 2001
Against today's NWS flood stages, 4 of the 48 river and stream gauges here peaked at or above a flood stage (1 at major, 1 at moderate, 2 at minor). For 4 of them it is the highest peak in their comparable USGS record: Brickhouse Gully at Costa Rica St, Houston, Garners Bayou near Humble, Little White Oak Bayou at Trimble St, Houston, Vince Bayou at Pasadena. The highest tide gauge reading was 6.27 ft above MHHW at Manchester (Jun 9, 2001 at 4:54 AM CDT).
Tide gauges
| Tide gauge | Peak | Time | Against today's flood thresholds | Station record (NOAA) |
|---|---|---|---|---|
| Manchester | +6.27 ft | Jun 9, 2001 at 4:54 AM CDT | at or above NWS major | +10.45 ft (August 29, 2017) |
| Morgans Point, Barbours Cut | +3.22 ft | Jun 5, 2001 at 7:30 PM CDT | at or above NWS minor | +5.45 ft (July 8, 2024) |
| Galveston Bay Entrance, North Jetty | +2.08 ft | Jun 5, 2001 at 2:54 PM CDT | at or above NWS minor | +4.19 ft (July 8, 2024) |
| Eagle Point, Galveston Bay | +2.80 ft | Jun 5, 2001 at 4:42 PM CDT | 0.0 ft below NWS minor | +10.70 ft (September 13, 2008) |
| Galveston Pier 21 | +2.17 ft | Jun 5, 2001 at 4:30 PM CDT | 0.4 ft below NWS minor | +12.11 ft (September 8, 1900) |
Highest six-minute water level in the window, relative to mean higher high water (an ordinary high tide) on today's tidal datum.
River and stream gauges
Houston–Galveston
| Gauge | Peak | Time | Against today's NWS flood stages | In its record |
|---|---|---|---|---|
| Caney Creek near Splendora | 26.45 ft | June 9, 2001 | at or above major flood stage | highest since water year 2017 |
| Peach Creek at Splendora | 18.23 ft | June 10, 2001 | at or above moderate flood stage | highest since water year 2024 |
| Menard Creek near Rye | 20.23 ft | June 9, 2001 | at or above minor flood stage | highest since water year 2026 |
| East Fork San Jacinto River near Cleveland | 19.92 ft | June 10, 2001 | at or above minor flood stage | highest since water year 2024 |
| Trinity River at Romayor | 38.63 ft | June 11, 2001 | at or above action stage | highest since water year 2024 |
| Brickhouse Gully at Costa Rica St, Houston | 73.00 ft | June 9, 2001 | — | highest in 56 years of record |
| Garners Bayou near Humble | 59.41 ft | June 9, 2001 | — | highest in 40 years of record |
| Little White Oak Bayou at Trimble St, Houston | 46.21 ft | June 9, 2001 | — | highest in 36 years of record |
| Vince Bayou at Pasadena | 23.38 ft | June 9, 2001 | — | highest in 54 years of record |
| Spring Creek near Tomball | 151.65 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Panther Branch near Spring | 119.17 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Greens Bayou at Cutten Rd near Houston | 116.77 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Langham Creek near Addicks | 101.28 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Greens Bayou near US Highway 75 near Houston | 90.68 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Cole Creek at Deihl Rd, Houston | 81.59 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Little Cypress Creek near Cypress | 80.70 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Keegans Bayou at Roark Rd near Houston | 74.77 ft | June 7, 2001 | measured on an earlier datum: not compared | — |
| Greens Bayou near Houston | 67.81 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Buffalo Bayou near Addicks | 64.89 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Halls Bayou at Houston | 64.89 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Brays Bayou at Gessner Dr, Houston | 61.00 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Sims Bayou at Hiram Clarke St, Houston | 55.96 ft | June 9, 2001 | — | highest since water year 1976 |
| Brays Bayou at Houston | 54.13 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| White Oak Bayou at Houston | 52.84 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| White Oak Bayou at Alabonson Rd, Houston | 51.11 ft | June 9, 2001 | — | highest since water year 2026 |
| Cypress Creek at House-Hahl Rd near Cypress | 46.52 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Cypress Creek at Grant Rd near Cypress | 46.12 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Greens Bayou at Ley Rd, Houston | 44.02 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Hunting Bayou at IH 610, Houston | 41.97 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Cypress Creek at Stuebner-Airline Rd near Westfield | 41.33 ft | June 9, 2001 | — | highest since water year 2026 |
| White Oak Bayou at Main St, Houston | 38.59 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Buffalo Bayou at Houston | 36.58 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| West Fork San Jacinto River below Lake Conroe near Conroe | 36.36 ft | June 10, 2001 | — | highest since water year 2024 |
| West Fork San Jacinto River above Lake Houston near Porter | 34.43 ft | June 9, 2001 | 46.6 ft below minor flood stage | highest since water year 2026 |
| Willow Creek near Tomball | 32.34 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Cypress Creek near Westfield | 31.34 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Spring Creek near Spring | 29.65 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Sims Bayou at Houston | 27.91 ft | June 9, 2001 | — | highest since water year 1995 |
| East Fork San Jacinto River near New Caney | 23.44 ft | June 11, 2001 | measured on an earlier datum: not compared | — |
| West Fork San Jacinto River near Conroe | 23.38 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Langham Creek at W Little York Rd near Addicks | 21.70 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Clear Creek near Friendswood | 20.43 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Cedar Bayou near Crosby | 19.49 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Bear Branch at Research Blvd, The Woodlands | 17.28 ft | June 8, 2001 | measured on an earlier datum: not compared | — |
| San Jacinto River near Sheldon | 16.96 ft | June 10, 2001 | measured on an earlier datum: not compared | — |
| Panther Branch at Gosling Rd, The Woodlands | 15.35 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
| Buffalo Bayou at Turning Basin, Houston | 9.60 ft | June 9, 2001 | — | highest since water year 2017 |
| Bear Creek near Barker | 9.12 ft | June 9, 2001 | measured on an earlier datum: not compared | — |
Highest gage height in the window: from USGS's 15-minute record where it exists, otherwise the gauge's USGS annual peak when that fell in the window (a date only). Flood stages are the National Weather Service's current ones, which can differ from those in use at the time. Peaks USGS records on an earlier datum are listed but not compared.
How this page is built
Each gauge's highest reading between June 5, 2001 and June 14, 2001 (the window runs past the rain because large rivers crest days later), from USGS and NOAA records, for the gauges this site carries today in Houston–Galveston. Gauges installed since are not listed; a gauge out of service at the time has no row. Harris County's own gauges are not included: this site has their readings only from September 2026. Readings only: this page says nothing about damage or what happened at any street or property.
Every historic flood on this site · Storms since September 2026