MONOCACY RIVER AT JUG BRIDGE NEAR FREDERICK, MD
USGS 01643000 · Maryland · reports discharge (live), gauge height
Reading MONOCACY RIVER AT JUG BRIDGE NEAR FREDERICK, MD…
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USGS 01643000 · Maryland · reports discharge (live), gauge height
What the agencies suggest
Carry a pocket thermometer to monitor water temperatureNational Park Service
General guidance from the readings and the published lines named above, not a fishing forecast. Local rules and closures come first.
Reading Nov 5, 9:30 PM EST · provisional USGS data
Normal for Nov 5 Steady · 24 h Below NWS action stage
Discharge, last 7 days: 169 readings from Oct 29, 10:30 PM EDT to Nov 5, 9:30 PM EST; ranging 150 to 176 ft³/s; latest 168 ft³/s; shaded band: typical range (25th–75th percentile) for each date.
USGS provisional data may be revised. Source: USGS instantaneous values.
| Time | Discharge (ft³/s) | Gauge height (ft) | Normal, 25th–75th (ft³/s) |
|---|---|---|---|
| Nov 5, 9:30 PM EST | 168 | 1.6 | 160–717 |
| Nov 5, 8:30 PM EST | 168 | 1.6 | 160–717 |
| Nov 5, 7:30 PM EST | 168 | 1.6 | 160–717 |
| Nov 5, 6:30 PM EST | 171 | 1.61 | 160–717 |
| Nov 5, 5:30 PM EST | 171 | 1.61 | 160–717 |
| Nov 5, 4:30 PM EST | 168 | 1.6 | 160–717 |
| Nov 5, 3:30 PM EST | 168 | 1.6 | 160–717 |
| Nov 5, 2:30 PM EST | 168 | 1.6 | 160–717 |
| Nov 5, 1:30 PM EST | 168 | 1.6 | 160–717 |
| Nov 5, 12:30 PM EST | 168 | 1.6 | 160–717 |
| Nov 5, 11:30 AM EST | 165 | 1.59 | 160–717 |
| Nov 5, 10:30 AM EST | 165 | 1.59 | 160–717 |
| Nov 5, 9:30 AM EST | 165 | 1.59 | 160–717 |
| Nov 5, 8:30 AM EST | 165 | 1.59 | 160–717 |
| Nov 5, 7:30 AM EST | 165 | 1.59 | 160–717 |
| Nov 5, 6:30 AM EST | 165 | 1.59 | 160–717 |
| Nov 5, 5:30 AM EST | 162 | 1.58 | 160–717 |
| Nov 5, 4:30 AM EST | 159 | 1.57 | 160–717 |
| Nov 5, 3:30 AM EST | 159 | 1.57 | 160–717 |
| Nov 5, 2:30 AM EST | 159 | 1.57 | 160–717 |
| Nov 5, 1:30 AM EST | 159 | 1.57 | 160–717 |
| Nov 5, 12:30 AM EST | 159 | 1.57 | 160–717 |
| Nov 4, 11:30 PM EST | 156 | 1.56 | 159–752 |
| Nov 4, 10:30 PM EST | 156 | 1.56 | 159–752 |
| Nov 4, 9:30 PM EST | 156 | 1.56 | 159–752 |
| Nov 4, 8:30 PM EST | 156 | 1.56 | 159–752 |
| Nov 4, 7:30 PM EST | 156 | 1.56 | 159–752 |
| Nov 4, 6:30 PM EST | 156 | 1.56 | 159–752 |
| Nov 4, 5:30 PM EST | 156 | 1.56 | 159–752 |
| Nov 4, 4:30 PM EST | 156 | 1.56 | 159–752 |
| Nov 4, 3:30 PM EST | 159 | 1.57 | 159–752 |
| Nov 4, 2:30 PM EST | 156 | 1.56 | 159–752 |
| Nov 4, 1:30 PM EST | 153 | 1.55 | 159–752 |
| Nov 4, 12:30 PM EST | 153 | 1.55 | 159–752 |
| Nov 4, 11:30 AM EST | 153 | 1.55 | 159–752 |
| Nov 4, 10:30 AM EST | 153 | 1.55 | 159–752 |
| Nov 4, 9:30 AM EST | 153 | 1.55 | 159–752 |
| Nov 4, 8:30 AM EST | 153 | 1.55 | 159–752 |
| Nov 4, 7:30 AM EST | 153 | 1.55 | 159–752 |
| Nov 4, 6:30 AM EST | 153 | 1.55 | 159–752 |
| Nov 4, 5:30 AM EST | 153 | 1.55 | 159–752 |
| Nov 4, 4:30 AM EST | 156 | 1.56 | 159–752 |
| Nov 4, 3:30 AM EST | 156 | 1.56 | 159–752 |
| Nov 4, 2:30 AM EST | 156 | 1.56 | 159–752 |
| Nov 4, 1:30 AM EST | 159 | 1.57 | 159–752 |
| Nov 4, 12:30 AM EST | 159 | 1.57 | 159–752 |
| Nov 3, 11:30 PM EST | 159 | 1.57 | 147–765 |
| Nov 3, 10:30 PM EST | 156 | 1.56 | 147–765 |
| Nov 3, 9:30 PM EST | 156 | 1.56 | 147–765 |
| Nov 3, 8:30 PM EST | 156 | 1.56 | 147–765 |
| Nov 3, 7:30 PM EST | 159 | 1.57 | 147–765 |
| Nov 3, 6:30 PM EST | 159 | 1.57 | 147–765 |
| Nov 3, 5:30 PM EST | 159 | 1.57 | 147–765 |
| Nov 3, 4:30 PM EST | 156 | 1.56 | 147–765 |
| Nov 3, 3:30 PM EST | 156 | 1.56 | 147–765 |
| Nov 3, 2:30 PM EST | 156 | 1.56 | 147–765 |
| Nov 3, 1:30 PM EST | 156 | 1.56 | 147–765 |
| Nov 3, 12:30 PM EST | 156 | 1.56 | 147–765 |
| Nov 3, 11:30 AM EST | 153 | 1.55 | 147–765 |
| Nov 3, 10:30 AM EST | 153 | 1.55 | 147–765 |
| Nov 3, 9:30 AM EST | 153 | 1.55 | 147–765 |
| Nov 3, 8:30 AM EST | 153 | 1.55 | 147–765 |
| Nov 3, 7:30 AM EST | 153 | 1.55 | 147–765 |
| Nov 3, 6:30 AM EST | 156 | 1.56 | 147–765 |
| Nov 3, 5:30 AM EST | 156 | 1.56 | 147–765 |
| Nov 3, 4:30 AM EST | 156 | 1.56 | 147–765 |
| Nov 3, 3:30 AM EST | 156 | 1.56 | 147–765 |
| Nov 3, 2:30 AM EST | 156 | 1.56 | 147–765 |
| Nov 3, 1:30 AM EST | 156 | 1.56 | 147–765 |
| Nov 3, 12:30 AM EST | 159 | 1.57 | 147–765 |
| Nov 2, 11:30 PM EST | 159 | 1.57 | 149–654 |
| Nov 2, 10:30 PM EST | 159 | 1.57 | 149–654 |
| Nov 2, 9:30 PM EST | 159 | 1.57 | 149–654 |
| Nov 2, 8:30 PM EST | 159 | 1.57 | 149–654 |
| Nov 2, 7:30 PM EST | 156 | 1.56 | 149–654 |
| Nov 2, 6:30 PM EST | 156 | 1.56 | 149–654 |
| Nov 2, 5:30 PM EST | 156 | 1.56 | 149–654 |
| Nov 2, 4:30 PM EST | 156 | 1.56 | 149–654 |
| Nov 2, 3:30 PM EST | 153 | 1.55 | 149–654 |
| Nov 2, 2:30 PM EST | 153 | 1.55 | 149–654 |
| Nov 2, 1:30 PM EST | 153 | 1.55 | 149–654 |
| Nov 2, 12:30 PM EST | 150 | 1.54 | 149–654 |
| Nov 2, 11:30 AM EST | 150 | 1.54 | 149–654 |
| Nov 2, 10:30 AM EST | 150 | 1.54 | 149–654 |
| Nov 2, 9:30 AM EST | 150 | 1.54 | 149–654 |
| Nov 2, 8:30 AM EST | 153 | 1.55 | 149–654 |
| Nov 2, 7:30 AM EST | 153 | 1.55 | 149–654 |
| Nov 2, 6:30 AM EST | 153 | 1.55 | 149–654 |
| Nov 2, 5:30 AM EST | 153 | 1.55 | 149–654 |
| Nov 2, 4:30 AM EST | 156 | 1.56 | 149–654 |
| Nov 2, 3:30 AM EST | 156 | 1.56 | 149–654 |
| Nov 2, 2:30 AM EST | 156 | 1.56 | 149–654 |
| Nov 2, 1:30 AM EST | 159 | 1.57 | 149–654 |
| Nov 2, 12:30 AM EST | 159 | 1.57 | 149–654 |
| Nov 1, 11:30 PM EST | 159 | 1.57 | 151–617 |
| Nov 1, 10:30 PM EST | 159 | 1.57 | 151–617 |
| Nov 1, 9:30 PM EST | 159 | 1.57 | 151–617 |
| Nov 1, 8:30 PM EST | 162 | 1.58 | 151–617 |
| Nov 1, 7:30 PM EST | 159 | 1.57 | 151–617 |
| Nov 1, 6:30 PM EST | 159 | 1.57 | 151–617 |
| Nov 1, 5:30 PM EST | 159 | 1.57 | 151–617 |
| Nov 1, 4:30 PM EST | 156 | 1.56 | 151–617 |
| Nov 1, 3:30 PM EST | 156 | 1.56 | 151–617 |
| Nov 1, 2:30 PM EST | 153 | 1.55 | 151–617 |
| Nov 1, 1:30 PM EST | 153 | 1.55 | 151–617 |
| Nov 1, 12:30 PM EST | 153 | 1.55 | 151–617 |
| Nov 1, 11:30 AM EST | 153 | 1.55 | 151–617 |
| Nov 1, 10:30 AM EST | 156 | 1.56 | 151–617 |
| Nov 1, 9:30 AM EST | 156 | 1.56 | 151–617 |
| Nov 1, 8:30 AM EST | 156 | 1.56 | 151–617 |
| Nov 1, 7:30 AM EST | 156 | 1.56 | 151–617 |
| Nov 1, 6:30 AM EST | 159 | 1.57 | 151–617 |
| Nov 1, 5:30 AM EST | 159 | 1.57 | 151–617 |
| Nov 1, 4:30 AM EST | 159 | 1.57 | 151–617 |
| Nov 1, 3:30 AM EST | 159 | 1.57 | 151–617 |
| Nov 1, 2:30 AM EST | 159 | 1.57 | 151–617 |
| Nov 1, 1:30 AM EST | 159 | 1.57 | 151–617 |
| Nov 1, 1:30 AM EDT | 162 | 1.58 | 151–617 |
| Nov 1, 12:30 AM EDT | 162 | 1.58 | 151–617 |
| Oct 31, 11:30 PM EDT | 162 | 1.58 | 146–670 |
| Oct 31, 10:30 PM EDT | 162 | 1.58 | 146–670 |
| Oct 31, 9:30 PM EDT | 162 | 1.58 | 146–670 |
| Oct 31, 8:30 PM EDT | 162 | 1.58 | 146–670 |
| Oct 31, 7:30 PM EDT | 162 | 1.58 | 146–670 |
| Oct 31, 6:30 PM EDT | 162 | 1.58 | 146–670 |
| Oct 31, 5:30 PM EDT | 162 | 1.58 | 146–670 |
| Oct 31, 4:30 PM EDT | 159 | 1.57 | 146–670 |
| Oct 31, 3:30 PM EDT | 159 | 1.57 | 146–670 |
| Oct 31, 2:30 PM EDT | 159 | 1.57 | 146–670 |
| Oct 31, 1:30 PM EDT | 159 | 1.57 | 146–670 |
| Oct 31, 12:30 PM EDT | 159 | 1.57 | 146–670 |
| Oct 31, 11:30 AM EDT | 162 | 1.58 | 146–670 |
| Oct 31, 10:30 AM EDT | 162 | 1.58 | 146–670 |
| Oct 31, 9:30 AM EDT | 165 | 1.59 | 146–670 |
| Oct 31, 8:30 AM EDT | 165 | 1.59 | 146–670 |
| Oct 31, 7:30 AM EDT | 165 | 1.59 | 146–670 |
| Oct 31, 6:30 AM EDT | 168 | 1.6 | 146–670 |
| Oct 31, 5:30 AM EDT | 168 | 1.6 | 146–670 |
| Oct 31, 4:30 AM EDT | 171 | 1.61 | 146–670 |
| Oct 31, 3:30 AM EDT | 171 | 1.61 | 146–670 |
| Oct 31, 2:30 AM EDT | 171 | 1.61 | 146–670 |
| Oct 31, 1:30 AM EDT | 171 | 1.61 | 146–670 |
| Oct 31, 12:30 AM EDT | 171 | 1.61 | 146–670 |
| Oct 30, 11:30 PM EDT | 171 | 1.61 | 147–591 |
| Oct 30, 10:30 PM EDT | 168 | 1.6 | 147–591 |
| Oct 30, 9:30 PM EDT | 168 | 1.6 | 147–591 |
| Oct 30, 8:30 PM EDT | 168 | 1.6 | 147–591 |
| Oct 30, 7:30 PM EDT | 168 | 1.6 | 147–591 |
| Oct 30, 6:30 PM EDT | 168 | 1.6 | 147–591 |
| Oct 30, 5:30 PM EDT | 171 | 1.61 | 147–591 |
| Oct 30, 4:30 PM EDT | 171 | 1.61 | 147–591 |
| Oct 30, 3:30 PM EDT | 171 | 1.61 | 147–591 |
| Oct 30, 2:30 PM EDT | 171 | 1.61 | 147–591 |
| Oct 30, 1:30 PM EDT | 171 | 1.61 | 147–591 |
| Oct 30, 12:30 PM EDT | 171 | 1.61 | 147–591 |
| Oct 30, 11:30 AM EDT | 171 | 1.61 | 147–591 |
| Oct 30, 10:30 AM EDT | 171 | 1.61 | 147–591 |
| Oct 30, 9:30 AM EDT | 173 | 1.62 | 147–591 |
| Oct 30, 8:30 AM EDT | 170 | 1.61 | 147–591 |
| Oct 30, 7:30 AM EDT | 170 | 1.61 | 147–591 |
| Oct 30, 6:30 AM EDT | 170 | 1.61 | 147–591 |
| Oct 30, 5:30 AM EDT | 170 | 1.61 | 147–591 |
| Oct 30, 4:30 AM EDT | 173 | 1.62 | 147–591 |
| Oct 30, 3:30 AM EDT | 173 | 1.62 | 147–591 |
| Oct 30, 2:30 AM EDT | 173 | 1.62 | 147–591 |
| Oct 30, 1:30 AM EDT | 173 | 1.62 | 147–591 |
| Oct 30, 12:30 AM EDT | 176 | 1.63 | 147–591 |
| Oct 29, 11:30 PM EDT | 176 | 1.63 | 154–562 |
| Oct 29, 10:30 PM EDT | 176 | 1.63 | 154–562 |
Map of USGS gauge 01643000 and the river around it
Where MONOCACY RIVER AT JUG BRIDGE NEAR FREDERICK, MD sits, with 3 other gauges on the same river.
No current water-temperature reading at this gauge, so no temperature guidance is given. Take a stream thermometer: the trout lines Maryland DNR uses are 65°F and 68°F.
Normal for Nov 5: 160–717 ft³/s (middle half of 97 years of record). Now: 168 ft³/s, normal.
Normal for this date. 168 ft³/s is between the 25th and 75th percentiles of daily mean flow for Nov 5 at this gauge over 97 years of record (1930–2026): 10th 110, 25th 160, median 331, 75th 717, 90th 1,190 ft³/s.
Daily means on record for Nov 5: lowest 62 ft³/s, highest 5,370 ft³/s.
Classes as USGS labels them (hyswap: flow categories (WDFN_stats schema) (U.S. Geological Survey) ); percentiles from the USGS daily statistics (U.S. Geological Survey) (approved daily means; the reading is provisional and instantaneous).
Steady over 24 hours (+7.7% discharge). Rising or falling means a change of more than 10% in discharge (or 0.2 ft of gauge height) over 24 hours; our rule of thumb, not a USGS class.
Species list not on file for this gauge. Check the Maryland Department of Natural Resources: Maryland trout stocking · Maryland fishing regulations.
Below NWS action stage. The National Weather Service reports this gauge below its action stage. That is not a statement that wading is safe.
Flood categories: action stage, minor, moderate and major flooding (National Weather Service)Turn Around Don't Drown. “A mere 6 inches of fast-moving flood water can knock over an adult.” No flow number makes a crossing safe; if in doubt, stay out.
Turn Around Don't Drown (National Weather Service)Guidance from the readings above and the published thresholds named with each line; not a fishing forecast, a safety guarantee or a statement about access. Local rules and closures come first.
Below NWS action stage. The National Weather Service reports this gauge below its action stage. That is not a statement that wading is safe.
NWS observed 1.6 ft stage, 138 ft³/s at Nov 5, 9:30 PM EST (NWS gauge FDKM2; its stage datum can differ from the USGS gauge height).
NWS river forecast forecast issued Nov 5, 9:59 AM EST. Highest point: 1.7 ft, 165 ft³/s on Nov 6, 1:00 AM EST (Below NWS action stage).
| Day | Stage | Flow |
|---|---|---|
| Thu, Nov 5 | 1.6 ft | 138 ft³/s |
| Fri, Nov 6 | 1.7 ft | 165 ft³/s |
| Sat, Nov 7 | 1.5 ft | 113 ft³/s |
| Sun, Nov 8 | 1.5 ft | 113 ft³/s |
Open the NWS gauge page · What the categories mean (National Weather Service)
Checked Nov 5, 10:17 PM EST; readings refresh at most every 15 minutes and statistics daily. Provisional USGS data can be revised. Conditions change: re-check before you go. This is general guidance, not a fishing forecast, a safety guarantee or a statement about access.