SOUHEGAN RIVER AT MERRIMACK, NH
USGS 01094000 · New Hampshire · reports discharge (live), gauge height
Reading SOUHEGAN RIVER AT MERRIMACK, NH…
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USGS 01094000 · New Hampshire · 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, 7:30 PM EST · provisional USGS data
Below normal for Nov 5 Falling · 24 h Below NWS action stage
Discharge, last 7 days: 169 readings from Oct 29, 8:30 PM EDT to Nov 5, 7:30 PM EST; ranging 52.8 to 83 ft³/s; latest 52.8 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, 7:30 PM EST | 52.8 | 2.43 | 68–226 |
| Nov 5, 6:30 PM EST | 52.8 | 2.43 | 68–226 |
| Nov 5, 5:30 PM EST | 52.8 | 2.43 | 68–226 |
| Nov 5, 4:30 PM EST | 54.2 | 2.44 | 68–226 |
| Nov 5, 3:30 PM EST | 52.8 | 2.43 | 68–226 |
| Nov 5, 2:30 PM EST | 52.8 | 2.43 | 68–226 |
| Nov 5, 1:30 PM EST | 52.8 | 2.43 | 68–226 |
| Nov 5, 12:30 PM EST | 55.6 | 2.45 | 68–226 |
| Nov 5, 11:30 AM EST | 54.2 | 2.44 | 68–226 |
| Nov 5, 10:30 AM EST | 54.2 | 2.44 | 68–226 |
| Nov 5, 9:30 AM EST | 54.2 | 2.44 | 68–226 |
| Nov 5, 8:30 AM EST | 54.2 | 2.44 | 68–226 |
| Nov 5, 7:30 AM EST | 54.2 | 2.44 | 68–226 |
| Nov 5, 6:30 AM EST | 55.6 | 2.45 | 68–226 |
| Nov 5, 5:30 AM EST | 55.6 | 2.45 | 68–226 |
| Nov 5, 4:30 AM EST | 55.6 | 2.45 | 68–226 |
| Nov 5, 3:30 AM EST | 57 | 2.46 | 68–226 |
| Nov 5, 2:30 AM EST | 57 | 2.46 | 68–226 |
| Nov 5, 1:30 AM EST | 57 | 2.46 | 68–226 |
| Nov 5, 12:30 AM EST | 58.5 | 2.47 | 68–226 |
| Nov 4, 11:30 PM EST | 58.5 | 2.47 | 67–234 |
| Nov 4, 10:30 PM EST | 58.5 | 2.47 | 67–234 |
| Nov 4, 9:30 PM EST | 58.5 | 2.47 | 67–234 |
| Nov 4, 8:30 PM EST | 58.5 | 2.47 | 67–234 |
| Nov 4, 7:30 PM EST | 60 | 2.48 | 67–234 |
| Nov 4, 6:30 PM EST | 60 | 2.48 | 67–234 |
| Nov 4, 5:30 PM EST | 61.5 | 2.49 | 67–234 |
| Nov 4, 4:30 PM EST | 63.1 | 2.5 | 67–234 |
| Nov 4, 3:30 PM EST | 63.1 | 2.5 | 67–234 |
| Nov 4, 2:30 PM EST | 64.6 | 2.51 | 67–234 |
| Nov 4, 1:30 PM EST | 66.2 | 2.52 | 67–234 |
| Nov 4, 12:30 PM EST | 66.2 | 2.52 | 67–234 |
| Nov 4, 11:30 AM EST | 67.7 | 2.53 | 67–234 |
| Nov 4, 10:30 AM EST | 69.3 | 2.54 | 67–234 |
| Nov 4, 9:30 AM EST | 70.9 | 2.55 | 67–234 |
| Nov 4, 8:30 AM EST | 72.6 | 2.56 | 67–234 |
| Nov 4, 7:30 AM EST | 76 | 2.58 | 67–234 |
| Nov 4, 6:30 AM EST | 77.8 | 2.59 | 67–234 |
| Nov 4, 5:30 AM EST | 79.5 | 2.6 | 67–234 |
| Nov 4, 4:30 AM EST | 81.3 | 2.61 | 67–234 |
| Nov 4, 3:30 AM EST | 83 | 2.62 | 67–234 |
| Nov 4, 2:30 AM EST | 83 | 2.62 | 67–234 |
| Nov 4, 1:30 AM EST | 83 | 2.62 | 67–234 |
| Nov 4, 12:30 AM EST | 83 | 2.62 | 67–234 |
| Nov 3, 11:30 PM EST | 83 | 2.62 | 60–229 |
| Nov 3, 10:30 PM EST | 83 | 2.62 | 60–229 |
| Nov 3, 9:30 PM EST | 83 | 2.62 | 60–229 |
| Nov 3, 8:30 PM EST | 81.3 | 2.61 | 60–229 |
| Nov 3, 7:30 PM EST | 81.3 | 2.61 | 60–229 |
| Nov 3, 6:30 PM EST | 81.3 | 2.61 | 60–229 |
| Nov 3, 5:30 PM EST | 81.3 | 2.61 | 60–229 |
| Nov 3, 4:30 PM EST | 79.5 | 2.6 | 60–229 |
| Nov 3, 3:30 PM EST | 77.8 | 2.59 | 60–229 |
| Nov 3, 2:30 PM EST | 76 | 2.58 | 60–229 |
| Nov 3, 1:30 PM EST | 76 | 2.58 | 60–229 |
| Nov 3, 12:30 PM EST | 72.6 | 2.56 | 60–229 |
| Nov 3, 11:30 AM EST | 69.3 | 2.54 | 60–229 |
| Nov 3, 10:30 AM EST | 67.7 | 2.53 | 60–229 |
| Nov 3, 9:30 AM EST | 66.2 | 2.52 | 60–229 |
| Nov 3, 8:30 AM EST | 64.6 | 2.51 | 60–229 |
| Nov 3, 7:30 AM EST | 64.6 | 2.51 | 60–229 |
| Nov 3, 6:30 AM EST | 64.6 | 2.51 | 60–229 |
| Nov 3, 5:30 AM EST | 64.6 | 2.51 | 60–229 |
| Nov 3, 4:30 AM EST | 64.6 | 2.51 | 60–229 |
| Nov 3, 3:30 AM EST | 64.6 | 2.51 | 60–229 |
| Nov 3, 2:30 AM EST | 64.6 | 2.51 | 60–229 |
| Nov 3, 1:30 AM EST | 64.6 | 2.51 | 60–229 |
| Nov 3, 12:30 AM EST | 64.6 | 2.51 | 60–229 |
| Nov 2, 11:30 PM EST | 64.6 | 2.51 | 53–222 |
| Nov 2, 10:30 PM EST | 64.6 | 2.51 | 53–222 |
| Nov 2, 9:30 PM EST | 64.6 | 2.51 | 53–222 |
| Nov 2, 8:30 PM EST | 64.6 | 2.51 | 53–222 |
| Nov 2, 7:30 PM EST | 64.6 | 2.51 | 53–222 |
| Nov 2, 6:30 PM EST | 64.6 | 2.51 | 53–222 |
| Nov 2, 5:30 PM EST | 64.6 | 2.51 | 53–222 |
| Nov 2, 4:30 PM EST | 64.6 | 2.51 | 53–222 |
| Nov 2, 3:30 PM EST | 64.6 | 2.51 | 53–222 |
| Nov 2, 2:30 PM EST | 64.6 | 2.51 | 53–222 |
| Nov 2, 1:30 PM EST | 64.6 | 2.51 | 53–222 |
| Nov 2, 12:30 PM EST | 64.6 | 2.51 | 53–222 |
| Nov 2, 11:30 AM EST | 66.2 | 2.52 | 53–222 |
| Nov 2, 10:30 AM EST | 66.2 | 2.52 | 53–222 |
| Nov 2, 9:30 AM EST | 66.2 | 2.52 | 53–222 |
| Nov 2, 8:30 AM EST | 66.2 | 2.52 | 53–222 |
| Nov 2, 7:30 AM EST | 66.2 | 2.52 | 53–222 |
| Nov 2, 6:30 AM EST | 66.2 | 2.52 | 53–222 |
| Nov 2, 5:30 AM EST | 66.2 | 2.52 | 53–222 |
| Nov 2, 4:30 AM EST | 66.2 | 2.52 | 53–222 |
| Nov 2, 3:30 AM EST | 66.2 | 2.52 | 53–222 |
| Nov 2, 2:30 AM EST | 66.2 | 2.52 | 53–222 |
| Nov 2, 1:30 AM EST | 66.2 | 2.52 | 53–222 |
| Nov 2, 12:30 AM EST | 66.2 | 2.52 | 53–222 |
| Nov 1, 11:30 PM EST | 66.2 | 2.52 | 51–230 |
| Nov 1, 10:30 PM EST | 66.2 | 2.52 | 51–230 |
| Nov 1, 9:30 PM EST | 66.2 | 2.52 | 51–230 |
| Nov 1, 8:30 PM EST | 66.2 | 2.52 | 51–230 |
| Nov 1, 7:30 PM EST | 66.2 | 2.52 | 51–230 |
| Nov 1, 6:30 PM EST | 66.2 | 2.52 | 51–230 |
| Nov 1, 5:30 PM EST | 66.2 | 2.52 | 51–230 |
| Nov 1, 4:30 PM EST | 66.2 | 2.52 | 51–230 |
| Nov 1, 3:30 PM EST | 67.7 | 2.53 | 51–230 |
| Nov 1, 2:30 PM EST | 67.7 | 2.53 | 51–230 |
| Nov 1, 1:30 PM EST | 67.7 | 2.53 | 51–230 |
| Nov 1, 12:30 PM EST | 67.7 | 2.53 | 51–230 |
| Nov 1, 11:30 AM EST | 67.7 | 2.53 | 51–230 |
| Nov 1, 10:30 AM EST | 67.7 | 2.53 | 51–230 |
| Nov 1, 9:30 AM EST | 67.7 | 2.53 | 51–230 |
| Nov 1, 8:30 AM EST | 67.7 | 2.53 | 51–230 |
| Nov 1, 7:30 AM EST | 69.3 | 2.54 | 51–230 |
| Nov 1, 6:30 AM EST | 69.3 | 2.54 | 51–230 |
| Nov 1, 5:30 AM EST | 69.3 | 2.54 | 51–230 |
| Nov 1, 4:30 AM EST | 69.3 | 2.54 | 51–230 |
| Nov 1, 3:30 AM EST | 69.3 | 2.54 | 51–230 |
| Nov 1, 2:30 AM EST | 69.3 | 2.54 | 51–230 |
| Nov 1, 1:30 AM EST | 69.3 | 2.54 | 51–230 |
| Nov 1, 1:30 AM EDT | 69.3 | 2.54 | 51–230 |
| Nov 1, 12:30 AM EDT | 69.3 | 2.54 | 51–230 |
| Oct 31, 11:30 PM EDT | 69.3 | 2.54 | 46–241 |
| Oct 31, 10:30 PM EDT | 69.3 | 2.54 | 46–241 |
| Oct 31, 9:30 PM EDT | 69.3 | 2.54 | 46–241 |
| Oct 31, 8:30 PM EDT | 69.3 | 2.54 | 46–241 |
| Oct 31, 7:30 PM EDT | 69.3 | 2.54 | 46–241 |
| Oct 31, 6:30 PM EDT | 69.3 | 2.54 | 46–241 |
| Oct 31, 5:30 PM EDT | 69.3 | 2.54 | 46–241 |
| Oct 31, 4:30 PM EDT | 69.3 | 2.54 | 46–241 |
| Oct 31, 3:30 PM EDT | 69.3 | 2.54 | 46–241 |
| Oct 31, 2:30 PM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 1:30 PM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 12:30 PM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 11:30 AM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 10:30 AM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 9:30 AM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 8:30 AM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 7:30 AM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 6:30 AM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 5:30 AM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 4:30 AM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 3:30 AM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 2:30 AM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 1:30 AM EDT | 70.9 | 2.55 | 46–241 |
| Oct 31, 12:30 AM EDT | 72.6 | 2.56 | 46–241 |
| Oct 30, 11:30 PM EDT | 72.6 | 2.56 | 46–237 |
| Oct 30, 10:30 PM EDT | 72.6 | 2.56 | 46–237 |
| Oct 30, 9:30 PM EDT | 72.6 | 2.56 | 46–237 |
| Oct 30, 8:30 PM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 7:30 PM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 6:30 PM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 5:30 PM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 4:30 PM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 3:30 PM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 2:30 PM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 1:30 PM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 12:30 PM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 11:30 AM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 10:30 AM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 9:30 AM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 8:30 AM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 7:30 AM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 6:30 AM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 5:30 AM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 4:30 AM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 3:30 AM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 2:30 AM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 1:30 AM EDT | 74.3 | 2.57 | 46–237 |
| Oct 30, 12:30 AM EDT | 74.3 | 2.57 | 46–237 |
| Oct 29, 11:30 PM EDT | 74.3 | 2.57 | 44–224 |
| Oct 29, 10:30 PM EDT | 74.3 | 2.57 | 44–224 |
| Oct 29, 9:30 PM EDT | 74.3 | 2.57 | 44–224 |
| Oct 29, 8:30 PM EDT | 74.3 | 2.57 | 44–224 |
Map of USGS gauge 01094000 and the river around it
Where SOUHEGAN RIVER AT MERRIMACK, NH sits, with 1 other gauge on the same river and our water's map point.
No current water-temperature reading at this gauge, so no temperature guidance is given. Take a stream thermometer. New Hampshire Fish and Game Department publishes no water-temperature line for trout anglers that we found. The lines below are the National Park Service's, federal guidance, not a New Hampshire rule: 68°F.
This gauge is on our page for Souhegan River, but no agency page we read lists its species.
Normal for Nov 5: 68–226 ft³/s (middle half of 92 years of record). Now: 52.8 ft³/s, below normal.
Below normal for this date. 52.8 ft³/s is between the 10th and 25th percentiles of daily mean flow for Nov 5 at this gauge over 92 years of record (1910–2026): 10th 40, 25th 68, median 95, 75th 226, 90th 487 ft³/s.
Daily means on record for Nov 5: lowest 12 ft³/s, highest 4,200 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).
Falling over 24 hours: discharge down 12%, from 60 to 52.8 ft³/s. 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.
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 2.43 ft stage, 53 ft³/s at Nov 5, 7:30 PM EST (NWS gauge SOHN3; its stage datum can differ from the USGS gauge height).
NWS river forecast forecast issued Nov 5, 10:32 AM EST. Highest point: 2.6 ft, 80 ft³/s on Nov 7, 1:00 AM EST (Below NWS action stage).
| Day | Stage | Flow |
|---|---|---|
| Thu, Nov 5 | 2.4 ft | 49 ft³/s |
| Fri, Nov 6 | 2.5 ft | 63 ft³/s |
| Sat, Nov 7 | 2.6 ft | 80 ft³/s |
| Sun, Nov 8 | 2.5 ft | 63 ft³/s |
Open the NWS gauge page · What the categories mean (National Weather Service)
Checked Nov 5, 8:23 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.