Patapsco River
River in Maryland, read from 3 USGS gauges, draining about 312 square miles. Figures refresh every fifteen minutes.
Discharge
38.9
cfs · 38 min ago
Normal for today
67.0
cfs median, 16 yrs
Water temp
—
not measured here
Gage height
5.35
ft
Gauges on this water
Reading by reach
Reading the number
On this date the gauge has averaged 67.0 cfs over 16 years of record, with the middle half of years falling between 55.0 and 98.0 cfs. Today is below that band: lower, clearer and, in summer, warmer water than a typical October day here.
Regional hatch calendar
What is likely hatching near Patapsco River
Patapsco River does not have its own verified chart yet. This calendar is combined from the verified charts on Susquehanna River (65 mi), Juniata River (83 mi), Tulpehocken Creek (84 mi). Treat it as regional timing, and file a report if you see something different here.
| Insect | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Caddis | January: absent | February: absent | March: absent | April: active | May: peak | June: peak | July: active | August: active | September: active | October: active | November: absent | December: absent |
| Crayfish | January: absent | February: absent | March: absent | April: active | May: active | June: peak | July: peak | August: peak | September: active | October: active | November: absent | December: absent |
| Damselfly | January: absent | February: absent | March: absent | April: absent | May: absent | June: active | July: peak | August: peak | September: active | October: absent | November: absent | December: absent |
| Grasshopper | January: absent | February: absent | March: absent | April: absent | May: absent | June: absent | July: active | August: peak | September: peak | October: active | November: absent | December: absent |
| Hellgrammite | January: absent | February: absent | March: absent | April: absent | May: active | June: peak | July: peak | August: active | September: active | October: absent | November: absent | December: absent |
| Light Cahill | January: absent | February: absent | March: absent | April: absent | May: active | June: peak | July: active | August: absent | September: absent | October: absent | November: absent | December: absent |
| Sculpin | January: absent | February: absent | March: active | April: active | May: active | June: active | July: active | August: active | September: peak | October: peak | November: active | December: absent |
| White Fly | January: absent | February: absent | March: absent | April: absent | May: absent | June: absent | July: peak | August: peak | September: absent | October: absent | November: absent | December: absent |
| Blue-Winged Olive | January: absent | February: absent | March: active | April: peak | May: active | June: absent | July: absent | August: absent | September: active | October: peak | November: active | December: absent |
| Little Black Stonefly | January: absent | February: absent | March: peak | April: active | May: absent | June: absent | July: absent | August: absent | September: absent | October: absent | November: absent | December: absent |
| Midge | January: peak | February: peak | March: active | April: absent | May: absent | June: absent | July: absent | August: absent | September: absent | October: absent | November: active | December: peak |
| Sulphur | January: absent | February: absent | March: absent | April: active | May: peak | June: active | July: absent | August: absent | September: absent | October: absent | November: absent | December: absent |
Reports
From anglers on Patapsco River
No reports filed here yet. The first one becomes the page’s local knowledge, stamped with the flow at the time. File a report.