Michigan River Levels & Streamflow
As of Sep 25, 2026, Michigan rivers are running at 116% of normal across 125 USGS gauges — the highest is 4,090 cfs on the St. Joseph River At Niles. Live discharge, gauge height, and percent-of-normal for every USGS streamgauge in Michigan.
Streamflow levels across Michigan are currently 116% of normal, with the St. Joseph River At Niles reporting the highest discharge in the state at 4,090 cfs and a gauge stage of 6.46 ft.
Meanwhile, the Michigamme River Near Crystal Falls is seeing a spike today — up 19% since yesterday and currently running near peak.
Tap any gauge below for the full hydrograph, paired weather forecast, and historical context. Use the rivers panel to jump into Michigan's named rivers.
State-wide streamflow overview
The Michigan flow picture in four data points -- where the state sits versus historical norms, what's flowing hardest, and what's spiking fastest.
Percent of normal
100% is the historical norm. Below 70% indicates drought; above 130% can flag elevated flood risk.
Highest discharge
Gauge stage 6.46 ft
Biggest 24h spike
Now 221 cfs
Network coverage
USGS gauges feeding 0 named rivers in Michigan.
Where every gauge actually sits
One dot per Michigan streamgauge, placed by its own percent of normal. The state average is a single line through all of it.
Percent of normal compares today's discharge with the historical average for this calendar day. Tap any dot to open that gauge.
Michigan streamflow, three water years
Statewide percent of normal, every day since Sep 2023. The dotted line is normal.
799 daily readings from 125 reporting gauges. Percent of normal is today's statewide discharge against the historical average for the same calendar day — 100% is normal, not "good". The axis tops out at 175%: 14 readings above that — including the 250% peak in Apr 2026 — are drawn along the top edge, so a few flood days cannot flatten three years of everything else. The line breaks in 2 places where the record skips more than five days — those are gaps in reporting, not readings of zero.
Michigan USGS streamgauges
Every USGS gauge Snoflo tracks in Michigan. Sortable, quickly filterable. Numeric columns heat-mapped from light to deep. Tap any gauge for its full hydrograph and forecast.
| Streamgage | Streamflow | Gage height | Water temp | Air temp | Elevation | Watershed |
|---|---|---|---|---|---|---|
|
St. Joseph River At Niles, Mi
1 day ago · USGS 04101500 |
4,090 cfs | 6.46 ft | 64°F | 52°F | 664 ft | St. Joseph |
|
Grand River At Grand Rapids, Mi
1 day ago · USGS 04119000 |
2,830 cfs | 2.87 ft | · | 53°F | 587 ft | Lower Grand |
|
Kalamazoo River At New Richmond, Mi
1 day ago · USGS 04108660 |
2,250 cfs | 12.03 ft | 63°F | 55°F | 605 ft | Kalamazoo |
|
St. Joseph River At Mottville, Mi
1 day ago · USGS 04099000 |
2,130 cfs | 4.06 ft | · | 51°F | 780 ft | St. Joseph |
|
St. Joseph River At Three Rivers, Mi
1 day ago · USGS 04097500 |
1,560 cfs | 4.71 ft | · | 51°F | 800 ft | St. Joseph |
|
Manistee River Near Wellston, Mi
1 day ago · USGS 04125550 |
1,510 cfs | 8.70 ft | 63°F | 46°F | 621 ft | Manistee |
|
Grand River At Ionia, Mi
1 day ago · USGS 04116000 |
1,330 cfs | 9.48 ft | · | 46°F | 620 ft | Lower Grand |
|
Menominee River At Koss, Mi
1 day ago · USGS 04066800 |
1,200 cfs | 9.88 ft | · | 43°F | 663 ft | Menominee |
|
Au Sable River Near Au Sable, Mi
1 day ago · USGS 04137500 |
1,190 cfs | 8.57 ft | 66°F | 48°F | 587 ft | Au Sable |
|
Au Sable River Near Curtisville, Mi
1 day ago · USGS 04137005 |
1,180 cfs | 8.27 ft | 59°F | 41°F | 803 ft | Au Sable |
|
Kalamazoo River At Comstock, Mi
1 day ago · USGS 04106000 |
1,160 cfs | 4.87 ft | · | 54°F | 792 ft | Kalamazoo |
|
Manistee River Near Mesick, Mi
1 day ago · USGS 04124200 |
1,100 cfs | 3.60 ft | 62°F | 42°F | 754 ft | Manistee |
|
Au Sable River Near Mc Kinley, Mi
1 day ago · USGS 04136900 |
1,030 cfs | 7.49 ft | 57°F | 41°F | 853 ft | Au Sable |
|
Muskegon River Near Croton, Mi
1 day ago · USGS 04121970 |
1,020 cfs | 4.42 ft | 66°F | 47°F | 685 ft | Muskegon |
|
Menominee River Near Vulcan, Mi
1 day ago · USGS 04065722 |
999 cfs | 4.90 ft | · | 43°F | 807 ft | Menominee |
|
Menominee River At White Rapids Dam Near Banat, Mi
1 day ago · USGS 04066030 |
994 cfs | 6.21 ft | · | 43°F | 689 ft | Menominee |
|
Manistee River Near Sherman, Mi
1 day ago · USGS 04124000 |
945 cfs | 11.84 ft | 54°F | 46°F | 820 ft | Manistee |
|
Menominee River Below Pemene Creek Near Pembine, Mi
1 day ago · USGS 04066003 |
936 cfs | 6.82 ft | · | 43°F | 748 ft | Menominee |
|
Au Sable River At Mio, Mi
1 day ago · USGS 04136500 |
922 cfs | 3.02 ft | 57°F | 43°F | 946 ft | Au Sable |
|
Kalamazoo River Near Battle Creek, Mi
1 day ago · USGS 04105500 |
870 cfs | 3.69 ft | · | 54°F | 804 ft | Kalamazoo |
|
Grand River At Portland, Mi
1 day ago · USGS 04114000 |
868 cfs | 6.69 ft | · | 50°F | 719 ft | Upper Grand |
|
Paw Paw River At Riverside, Mi
1 day ago · USGS 04102500 |
814 cfs | 8.31 ft | · | 51°F | 610 ft | St. Joseph |
|
Au Sable River Near Red Oak, Mi
1 day ago · USGS 04136000 |
768 cfs | 3.09 ft | 53°F | 45°F | 1,008 ft | Au Sable |
|
River Raisin Near Monroe, Mi
1 day ago · USGS 04176500 |
710 cfs | 3.57 ft | 67°F | 57°F | 618 ft | Raisin |
|
Menominee River Near Florence, Mi
1 day ago · USGS 04063000 |
664 cfs | 3.02 ft | · | 44°F | 1,118 ft | Brule |
|
Grand River At Lansing, Mi
1 day ago · USGS 04113000 |
644 cfs | 3.74 ft | · | 49°F | 808 ft | Upper Grand |
|
Tittabawassee River At Midland, Mi
1 day ago · USGS 04156000 |
549 cfs | 9.28 ft | · | 47°F | 586 ft | Tittabawassee |
|
Muskegon River At Evart, Mi
1 day ago · USGS 04121500 |
533 cfs | 6.94 ft | · | 42°F | 997 ft | Muskegon |
|
Ontonagon River Near Rockland, Mi
1 day ago · USGS 04040000 |
489 cfs | 5.25 ft | 32°F | 40°F | 670 ft | Ontonagon |
|
Manistique River Near Manistique, Mi
1 day ago · USGS 04056500 |
487 cfs | 2.36 ft | · | 43°F | 617 ft | Manistique |
|
Kalamazoo River At Marshall, Mi
1 day ago · USGS 04103500 |
460 cfs | 4.77 ft | · | 53°F | 882 ft | Kalamazoo |
|
Pere Marquette River At Scottville, Mi
1 day ago · USGS 04122500 |
437 cfs | · | · | 47°F | 625 ft | Pere Marquette-White |
|
Thunder Bay River At Herron Road Near Bolton, Mi
1 day ago · USGS 04133501 |
370 cfs | 11.74 ft | · | 49°F | 704 ft | Thunder Bay |
|
Thornapple River Near Hastings, Mi
1 day ago · USGS 04117500 |
350 cfs | 3.76 ft | · | 52°F | 803 ft | Thornapple |
|
Dowagiac River At Sumnerville, Mi
1 day ago · USGS 04101800 |
313 cfs | 5.88 ft | · | 52°F | 716 ft | St. Joseph |
|
Battle Creek At Battle Creek, Mi
1 day ago · USGS 04105000 |
309 cfs | 1.24 ft | · | 49°F | 824 ft | Kalamazoo |
|
River Raisin Near Adrian, Mi
1 day ago · USGS 04176000 |
301 cfs | 5.63 ft | · | 54°F | 699 ft | Raisin |
|
Tahquamenon River Near Paradise, Mi
1 day ago · USGS 04045500 |
282 cfs | 3.26 ft | · | 40°F | 729 ft | Tahquamenon |
|
White River Near Whitehall, Mi
1 day ago · USGS 04122200 |
274 cfs | 1.16 ft | · | 51°F | 619 ft | Pere Marquette-White |
|
Escanaba River At Cornell, Mi
1 day ago · USGS 04059000 |
261 cfs | 1.36 ft | 53°F | 43°F | 735 ft | Escanaba |
|
Paint River Nr Alpha, Mi
1 day ago · USGS 04062000 |
221 cfs | 3.19 ft | · | 38°F | 1,271 ft | Brule |
|
Michigamme River Near Crystal Falls, Mi
1 day ago · USGS 04062500 |
221 cfs | 2.55 ft | · | 38°F | 1,305 ft | Michigamme |
|
Huron River At Ann Arbor, Mi
1 day ago · USGS 04174500 |
210 cfs | 12.10 ft | 64°F | 55°F | 758 ft | Huron |
|
Pine River At High School Bridge Nr Hoxeyville, Mi
1 day ago · USGS 04125460 |
209 cfs | 3.92 ft | 51°F | 43°F | 856 ft | Manistee |
|
Sturgeon River At Wolverine, Mi
1 day ago · USGS 04127997 |
201 cfs | 2.85 ft | · | 41°F | 778 ft | Cheboygan |
|
Rifle River Near Sterling, Mi
1 day ago · USGS 04142000 |
186 cfs | 1.53 ft | 53°F | 48°F | 639 ft | Au Gres-Rifle |
|
Tobacco River At Glidden Road At Beaverton, Mi
1 day ago · USGS 04152500 |
177 cfs | 2.31 ft | · | 46°F | 715 ft | Tittabawassee |
|
Jordan River Near East Jordan, Mi
1 day ago · USGS 04127800 |
176 cfs | 3.42 ft | · | 43°F | 629 ft | Boardman-Charlevoix |
|
Brule River At Us Highway 2 Near Florence, Mi
1 day ago · USGS 04060993 |
174 cfs | 3.44 ft | · | 44°F | 1,241 ft | Brule |
|
St. Joseph River At Burlington, Mi
1 day ago · USGS 04096405 |
171 cfs | 4.13 ft | · | 54°F | 906 ft | St. Joseph |
|
Shiawassee River At Owosso, Mi
1 day ago · USGS 04144500 |
161 cfs | 2.27 ft | · | 49°F | 695 ft | Shiawassee |
|
Clinton River At Moravian Drive At Mt. Clemens, Mi
1 day ago · USGS 04165500 |
152 cfs | 5.66 ft | 60°F | 55°F | 574 ft | Clinton |
|
Platte River At Honor, Mi
1 day ago · USGS 04126740 |
151 cfs | 1.34 ft | · | 45°F | 606 ft | Betsie-Platte |
|
Flint River Near Flint, Mi
1 day ago · USGS 04148500 |
150 cfs | 3.22 ft | · | 48°F | 684 ft | Flint |
|
South Branch Au Sable River Near Luzerne, Mi
1 day ago · USGS 04135700 |
145 cfs | 4.58 ft | 53°F | 44°F | 1,070 ft | Au Sable |
|
Little Muskegon River Near Oak Grove, Mi
1 day ago · USGS 04121944 |
142 cfs | 3.08 ft | 56°F | 46°F | 756 ft | Muskegon |
|
South Branch Black River Near Bangor, Mi
1 day ago · USGS 04102700 |
136 cfs | 4.48 ft | · | 49°F | 613 ft | Black-Macatawa |
|
Grand River At Jackson, Mi
1 day ago · USGS 04109000 |
132 cfs | 9.79 ft | · | 52°F | 911 ft | Upper Grand |
|
Huron River Near Hamburg, Mi
1 day ago · USGS 04172000 |
127 cfs | 4.51 ft | · | 51°F | 852 ft | Huron |
|
Rogue River Near Rockford, Mi
1 day ago · USGS 04118500 |
121 cfs | 3.76 ft | · | 52°F | 665 ft | Lower Grand |
|
Boardman R Above Brown Bridge Road Nr Mayfield, Mi
1 day ago · USGS 04126970 |
115 cfs | 3.21 ft | · | 45°F | 826 ft | Boardman-Charlevoix |
|
Sturgeon River Near Alston, Mi
1 day ago · USGS 04041500 |
108 cfs | 3.79 ft | 58°F | 39°F | 735 ft | Sturgeon |
|
Chippewa River Near Mount Pleasant, Mi
1 day ago · USGS 04154000 |
105 cfs | 3.10 ft | · | 48°F | 730 ft | Pine |
|
Clinton River Near Fraser, Mi
1 day ago · USGS 04164000 |
105 cfs | 5.29 ft | · | 55°F | 586 ft | Clinton |
|
Red Cedar River At East Lansing, Mi
1 day ago · USGS 04112500 |
101 cfs | 3.48 ft | · | 49°F | 829 ft | Upper Grand |
|
Flint River Near Otisville, Mi
1 day ago · USGS 04147500 |
89 cfs | 2.65 ft | · | 49°F | 728 ft | Flint |
|
Middle Branch Ontonagon River Near Paulding, Mi
1 day ago · USGS 04033000 |
87 cfs | 4.07 ft | · | 40°F | 1,500 ft | Ontonagon |
|
Prairie River Near Nottawa, Mi
1 day ago · USGS 04097540 |
84 cfs | 3.74 ft | 36°F | 51°F | 872 ft | St. Joseph |
|
Middle Branch Escanaba River Nr Princeton, Mi
1 day ago · USGS 04058100 |
80 cfs | 1.52 ft | · | 40°F | 1,114 ft | Escanaba |
|
Pine River Near Midland, Mi
1 day ago · USGS 04155500 |
75 cfs | 2.61 ft | · | 49°F | 628 ft | Pine |
|
Pigeon R At Sturgeon Valley Rd Near Vanderbilt, Mi
1 day ago · USGS 04128990 |
75 cfs | 2.23 ft | · | 42°F | 914 ft | Cheboygan |
|
Clinton River At Auburn Hills, Mi
1 day ago · USGS 04161000 |
70 cfs | 1.37 ft | · | 51°F | 846 ft | Clinton |
|
Wanadoga Creek Near Battle Creek, Mi
1 day ago · USGS 04104945 |
69 cfs | 4.73 ft | · | 53°F | 833 ft | Kalamazoo |
|
Clinton River At Sterling Heights, Mi
1 day ago · USGS 04161820 |
66 cfs | 7.40 ft | 59°F | 54°F | 612 ft | Clinton |
|
Looking Glass River Near Eagle, Mi
1 day ago · USGS 04114498 |
62 cfs | 2.85 ft | · | 50°F | 754 ft | Upper Grand |
|
Clam River At Vogel Center, Mi
1 day ago · USGS 04121300 |
62 cfs | 2.67 ft | · | 43°F | 1,134 ft | Muskegon |
|
Cass River At Frankenmuth, Mi
1 day ago · USGS 04151500 |
61 cfs | 3.51 ft | · | 49°F | 591 ft | Cass |
|
Mill Creek Near Dexter, Mi
1 day ago · USGS 04173500 |
58 cfs | 6.12 ft | · | 54°F | 856 ft | Huron |
|
Iron River At County Hwy-424 At Caspian, Mi
1 day ago · USGS 04060500 |
56 cfs | 3.98 ft | · | 37°F | 1,446 ft | Brule |
|
Maple River At Maple Rapids, Mi
1 day ago · USGS 04115000 |
56 cfs | 2.99 ft | · | 49°F | 646 ft | Maple |
|
Portage Creek At Kalamazoo, Mi
1 day ago · USGS 04106500 |
55 cfs | 2.41 ft | · | 55°F | 766 ft | Kalamazoo |
|
South Branch Hog Creek Near Allen, Mi
1 day ago · USGS 04096515 |
54 cfs | 2.90 ft | · | 50°F | 1,013 ft | St. Joseph |
|
Sturgeon River Near Nahma Junction, Mi
1 day ago · USGS 04057510 |
53 cfs | 3.75 ft | · | 42°F | 662 ft | Fishdam-Sturgeon |
|
Lower River Rouge At Dearborn, Mi
1 day ago · USGS 04168400 |
52 cfs | 3.31 ft | 62°F | 57°F | 582 ft | Detroit |
|
River Rouge At Detroit, Mi
1 day ago · USGS 04166500 |
51 cfs | 5.09 ft | 60°F | 54°F | 591 ft | Detroit |
|
South Branch Tobacco River Near Beaverton, Mi
1 day ago · USGS 04152238 |
49 cfs | 4.21 ft | · | 46°F | 727 ft | Tittabawassee |
|
Red Cedar River Near Williamston, Mi
1 day ago · USGS 04111379 |
47 cfs | 2.60 ft | · | 48°F | 865 ft | Upper Grand |
|
Augusta Creek Near Augusta, Mi
1 day ago · USGS 04105700 |
46 cfs | 1.20 ft | · | 48°F | 817 ft | Kalamazoo |
|
Galien River Near Sawyer, Mi
1 day ago · USGS 04096015 |
46 cfs | 6.74 ft | · | 52°F | 614 ft | Little Calumet-Galien |
|
Saline River Near Saline, Mi
1 day ago · USGS 04176400 |
46 cfs | 5.21 ft | · | 55°F | 711 ft | Raisin |
|
Middle River Rouge Near Garden City, Mi
1 day ago · USGS 04167000 |
46 cfs | 2.94 ft | · | 54°F | 609 ft | Detroit |
|
South Branch Flint River Near Columbiaville, Mi
1 day ago · USGS 04146063 |
45 cfs | 1.40 ft | · | 49°F | 768 ft | Flint |
|
Ford River Near Hyde, Mi
1 day ago · USGS 04059500 |
37 cfs | 1.57 ft | 46°F | 46°F | 707 ft | Cedar-Ford |
|
West Branch Ontonagon River Near Bergland, Mi
1 day ago · USGS 04036000 |
33 cfs | 1.20 ft | · | 41°F | 1,304 ft | Ontonagon |
|
Rabbit River Near Hopkins, Mi
1 day ago · USGS 04108600 |
32 cfs | 3.04 ft | · | 54°F | 717 ft | Kalamazoo |
|
Sycamore Creek At Holt Road Near Holt, Mi
1 day ago · USGS 04112850 |
30 cfs | 2.68 ft | · | 48°F | 856 ft | Upper Grand |
|
River Rouge At Southfield, Mi
1 day ago · USGS 04166100 |
28 cfs | 3.95 ft | 58°F | 53°F | 618 ft | Detroit |
|
Greenwood Release Near Greenwood, Mi
1 day ago · USGS 04057814 |
26 cfs | 2.42 ft | · | 39°F | 1,478 ft | Escanaba |
|
Greenwood Diversion Near Greenwood, Mi
1 day ago · USGS 04057813 |
21 cfs | 1.63 ft | · | 39°F | 1,439 ft | Escanaba |
|
Macatawa River At State Road Near Zeeland, Mi
1 day ago · USGS 04108800 |
18 cfs | 2.59 ft | · | 54°F | 598 ft | Black-Macatawa |
|
West Fork Portage Creek At Kalamazoo, Mi
1 day ago · USGS 04106400 |
17 cfs | 2.69 ft | · | 55°F | 883 ft | Kalamazoo |
|
Kearsley Creek Near Davison, Mi
1 day ago · USGS 04148140 |
17 cfs | 3.29 ft | · | 46°F | 759 ft | Flint |
|
Silver River Near L'Anse, Mi
1 day ago · USGS 04043150 |
16 cfs | 6.28 ft | · | 42°F | 625 ft | Dead-Kelsey |
|
East Branch Pine River Near Tustin, Mi
1 day ago · USGS 04124500 |
14 cfs | 2.44 ft | · | 41°F | 1,149 ft | Manistee |
|
Black River Near Bessemer, Mi
1 day ago · USGS 04031000 |
14 cfs | 1.88 ft | · | 40°F | 1,186 ft | Black-Presque Isle |
|
North Branch Clinton River Near Mt. Clemens, Mi
1 day ago · USGS 04164500 |
14 cfs | 4.24 ft | · | 54°F | 584 ft | Clinton |
|
Fish Creek Near Crystal, Mi
1 day ago · USGS 04115265 |
14 cfs | 2.04 ft | · | 49°F | 802 ft | Maple |
|
West Fork Portage Creek Near Oshtemo, Mi
1 day ago · USGS 04106320 |
14 cfs | 1.82 ft | · | 50°F | 875 ft | Kalamazoo |
|
Black River Near Jeddo, Mi
1 day ago · USGS 04159492 |
13 cfs | 2.97 ft | · | 51°F | 664 ft | St. Clair |
|
Belle River At Memphis, Mi
1 day ago · USGS 04160600 |
13 cfs | 1.06 ft | · | 51°F | 713 ft | St. Clair |
|
Sturgeon River Near Sidnaw, Mi
1 day ago · USGS 04040500 |
11 cfs | 3.13 ft | · | 38°F | 1,228 ft | Sturgeon |
|
Mill Creek Near Avoca, Mi
1 day ago · USGS 04159900 |
10 cfs | · | · | 51°F | 714 ft | St. Clair |
|
Upper River Rouge At Farmington, Mi
1 day ago · USGS 04166300 |
10 cfs | 3.05 ft | · | 53°F | 692 ft | Detroit |
|
Middle Branch Clinton River At Macomb, Mi
1 day ago · USGS 04164800 |
8 cfs | 5.99 ft | · | 52°F | 610 ft | Clinton |
|
Schweitzer Creek Near Palmer, Mi
1 day ago · USGS 04058200 |
6 cfs | 2.89 ft | · | 43°F | 1,277 ft | Escanaba |
|
Black River Near Garnet, Mi
1 day ago · USGS 04046000 |
6 cfs | 2.39 ft | · | 46°F | 655 ft | Brevoort-Millecoquins |
|
Farmers Creek Near Lapeer, Mi
1 day ago · USGS 04146000 |
6 cfs | 15.20 ft | · | 49°F | 827 ft | Flint |
|
East Pond Creek At Romeo, Mi
1 day ago · USGS 04164100 |
5 cfs | 1.07 ft | · | 51°F | 778 ft | Clinton |
|
Bear Creek Near Muskegon, Mi
1 day ago · USGS 04122100 |
5 cfs | 10.55 ft | · | 52°F | 609 ft | Muskegon |
|
Malletts Creek At Ann Arbor, Mi
1 day ago · USGS 04174518 |
5 cfs | 3.26 ft | · | 55°F | 749 ft | Huron |
|
Middle Branch Escanaba River At Humboldt, Mi
1 day ago · USGS 04057800 |
4 cfs | 1.58 ft | 51°F | 38°F | 1,526 ft | Escanaba |
|
Plum Brook At Utica, Mi
1 day ago · USGS 04163400 |
4 cfs | 2.06 ft | · | 51°F | 633 ft | Clinton |
|
Ecorse River At Dearborn Heights, Mi
1 day ago · USGS 04168580 |
1 cfs | 2.35 ft | · | 57°F | 611 ft | Detroit |
|
Sloan Creek Near Williamston, Mi
1 day ago · USGS 04112000 |
1 cfs | 1.72 ft | · | 48°F | 870 ft | Upper Grand |
|
Cisco Branch Ontonagon R At Cisco Lake Outlet, Mi
1 day ago · USGS 04037500 |
0 cfs | 3.86 ft | · | 41°F | 1,688 ft | Ontonagon |
See every Michigan gauge ranked against normal.
- Percentile rank & % of median for all 125 gauges
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About Michigan streamflow
What are river levels like in Michigan right now?
As of September 25, 2026, Michigan rivers are running at 116% of normal across 125 USGS streamgauges, and the St. Joseph River At Niles is reporting the highest discharge at 4,090 cfs. The full sortable gauge table is below.
Which Michigan river is running highest right now?
As of September 25, 2026, the highest discharge in Michigan is 4,090 cfs on the St. Joseph River At Niles. See the sortable gauge table for the full statewide ranking.
Are Michigan rivers high or low right now?
Compare the statewide percent-of-normal on this page: above 100% means Michigan rivers are running higher than the seasonal average for the date, below 100% means lower (a dry spell or drought). Each gauge also shows its own percent of median.
Where does the Michigan streamflow data come from?
The U.S. Geological Survey National Water Information System. USGS streamgauges report continuously (every 15 minutes) and the data is the canonical real-time record for U.S. rivers. Snoflo pulls the latest readings and joins them to a 7-day NOAA weather forecast for each station.
What is cfs?
Cubic feet per second — the standard unit for streamflow. One cfs is about 7.5 gallons per second. Small creeks run at single-digit cfs; the Mississippi at hundreds of thousands.
What does Gauge Height mean?
The water level at the gauge in feet above the reference datum. Used together with discharge to track river state. Flood stage and runnable levels are typically expressed in gauge height (e.g., "flood at 16 ft").
How fresh is the Michigan data?
USGS streamgauges report every 15 minutes; Snoflo re-pulls throughout the day. The AI briefing regenerates daily.
Can I get a flow alert for a Michigan gauge?
Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a discharge or stage threshold (e.g. "alert me when discharge crosses 2,000 cfs"), and you'll get a push the moment it crosses.
Is this a substitute for an NWS flood warning?
No. Snoflo is informational. For flood life-safety decisions always follow guidance from your local NWS forecast office and state emergency management. Snoflo data is one input among several.
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