Mississippi River Flows, Stream Forecast, Alton IL Gauge ALNI2

Mississippi River Flow
Location: Alton, IL
Gauge ID: ALNI2
Lat: 38.87N, Lon: 90.18W

Critical Stages
19' -Action	21' -Flood	29' -Moderate Flood	34' -Major Flood

Mississippi River Latest Observation
Updated: 1:00:00 PM CDT MON MAR 2 2015

Stage:

3.96 ft

Forecast

Forecast not available for this location.

	Date CDT	Stage ft
Observation history unavailable for thie location.

Flood Impacts
44.1	This level is estimated to be met or exceeded on average once every 500 years.
42.7	This is the RECORD FLOOD LEVEL that was reached on August 1 1993.
42.6	This level is expected to be met or exceeded on average once every 200 years.
40.0	Railroad tracks from Wood River to Alton begin to flood.
39.8	This level is estimated to be met or exceeded on average once every 100 years.
39.0	US Highway 67 floods from Wood River to Alton.
38.6	Flood waters reach the low steel on RR bridge swing span in Alton.
37.8	This level is estimated to be met or exceeded on average once every 50 years.
37.6	Damage begins to Miller Milling Company in Alton
36.6	Urban flood damage begins in Winfield.
35.3	This level is estimated to be met or exceeded on average once every 25 years.
35.0	Burlington Northern RR floods from West Alton, Missouri to Alton, Illinois.
34.3	This level is estimated to be met or exceeded on average once every 20 years.
34.0	Major damage level. Commercial damages begin in Alton.
33.5	Urban flood damage begins in Alton at Riverfront Park.
33.0	Urban flood damage begins in Elsah, Illinois and Portage des Sioux.
31.5	Commercial basements in Alton begin to flood.
31.4	This level is estimated to be met or exceeded on average once every 10 years.
29.9	Route 100 at Alton closes. Also at this level the north and south Wood River Levee structures are closed.
29.5	Urban flood damage begins in Peruque.
29.3	The North Wood River Levee must be closed at this level.
29.0	Moderate flooding begins.
28.8	This level is estimated to be met or exceeded on average once every 5 years.
28.5	The South Wood River Levee must be closed at this level.
26.5	Highway 94 floods from Portage des Sioux to West Alton.
25.5	Urban damage begins in Kampsville Illinois.
24.3	This level is estimated to be met or exceeded on average once every 2 years.
21.0	Flood Stage. Minor flooding begins to occur at this level.
20.8	Unprotected farm land begins to flood

Data provided by NOAA Advanced Hydrologic Prediction Service