Souhegan River At Merrimack

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Hydrograph

Stage Color Key
8 ft - Near Flood 9 ft - Minor Flood 11 ft - Moderate Flood 13 ft - Major Flood

Latest Observation: Wednesday March 11th, 2026 10:30 AM EDT
River Status: Normal

  Height Flow
Currently 4.73 ft 0.972 kcfs
Record 16.2 ft 16900 cfs

Forecast
  Date (EDT) Stage (ft) Flow (kcfs)
  Wednesday 03/11/2026 02:00 PM 4.70 0.95
  Wednesday 03/11/2026 08:00 PM 4.80 1.01
  Thursday 03/12/2026 02:00 AM 4.80 1.01
  Thursday 03/12/2026 08:00 AM 4.90 1.08
  Thursday 03/12/2026 02:00 PM 5.00 1.14
  Thursday 03/12/2026 08:00 PM 5.10 1.20
  Friday 03/13/2026 02:00 AM 5.20 1.27

Observation
  Date (EDT) Stage (ft) Flow (kcfs)
Wednesday 03/11/2026 10:30 AM 4.73 0.97
Wednesday 03/11/2026 10:15 AM 4.74 0.98
Wednesday 03/11/2026 10:01 AM 4.74 0.98
Wednesday 03/11/2026 10:00 AM 4.74 0.98
Wednesday 03/11/2026 09:45 AM 4.76 0.99
Wednesday 03/11/2026 09:30 AM 4.77 1.00
Wednesday 03/11/2026 09:15 AM 4.77 1.00
Wednesday 03/11/2026 09:00 AM 4.77 1.00
Wednesday 03/11/2026 08:45 AM 4.77 1.00
Wednesday 03/11/2026 08:30 AM 4.77 1.00
Wednesday 03/11/2026 08:15 AM 4.78 1.00
Wednesday 03/11/2026 08:00 AM 4.78 1.00
Wednesday 03/11/2026 07:45 AM 4.77 1.00
Wednesday 03/11/2026 07:30 AM 4.77 1.00
Wednesday 03/11/2026 07:15 AM 4.77 1.00
Wednesday 03/11/2026 07:00 AM 4.74 0.98
Wednesday 03/11/2026 06:45 AM 4.71 0.96
Wednesday 03/11/2026 06:30 AM 4.70 0.95
Wednesday 03/11/2026 06:15 AM 4.71 0.96
Wednesday 03/11/2026 06:00 AM 4.71 0.96
Wednesday 03/11/2026 05:45 AM 4.70 0.95
Wednesday 03/11/2026 05:30 AM 4.70 0.95
Wednesday 03/11/2026 05:15 AM 4.69 0.95
Wednesday 03/11/2026 05:00 AM 4.69 0.95
Wednesday 03/11/2026 04:45 AM 4.69 0.95
Wednesday 03/11/2026 04:30 AM 4.70 0.95
Wednesday 03/11/2026 04:15 AM 4.69 0.95
Wednesday 03/11/2026 04:01 AM 4.68 0.94
Wednesday 03/11/2026 04:00 AM 4.68 0.94
Wednesday 03/11/2026 03:45 AM 4.67 0.94

Data Courtesy of the National Water Prediction Service
Script Courtesy of Dennis at East Masonville Weather with mods by Saratoga-weather.org