| 65.0 | THIS IS A SERIOUS FLOOD EVENT. ALL PERSONS ALONG THE MERRIMACK RIVER SHOULD FOLLOW THE EVACUATION RECOMMENDATIONS FROM YOUR LOCAL EMERGENCY MANAGEMANT OFFICIALS. IF ASKED TO EVACUATE...DO SO IMMEDIATELY. ALL FLOOD PROTECTION MEASURES MUST BE RUSHED TO COMPLETION IN FLOOD PRONE AREAS. | | 62.0 | THIS IS A SERIOUS FLOOD EVENT. ALL PERSONS ALONG THE MERRIMACK RIVER SHOULD FOLLOW THE EVACUATION RECOMMENDATIONS FROM YOUR LOCAL EMERGENCY MANAGEMANT OFFICIALS. IF ASKED TO EVACUATE...DO SO IMMEDIATELY. ALL FLOOD PROTECTION MEASURES MUST BE RUSHED TO COMPLETION IN FLOOD PRONE AREAS. | | 60.0 | THIS IS A SERIOUS FLOOD EVENT. ALL PERSONS ALONG THE MERRIMACK RIVER FROM THE MASSACHUSETTS BORDERTHROUGH LAWRENCE AND HAVERHILL SHOULD FOLLOW THE EVACUATION RECOMMENDATIONS FROM YOUR LOCAL EMERGENCY MANAGEMANT OFFICIALS. IF ASKED TO EVACUATE...DO SO IMMEDIATELY. ALL FLOOD PROTECTION MEASURES MUST BE RUSHED TO COMPLETION IN FLOOD PRONE AREAS. | | 58.0 | FLOODING IS EXPECTED TO OVERSPREAD PORTIONS OF ROUTE 113 ABOVE THE PAWTUCKET FALLS. ALSO...PORTIONS OF ROUTE 110 AND SEVERAL HOMES AND BUSINESSES ALONG ROUTE 110 HEADING NORTH AND EAST INTO TEWKSBURY MAY BEGIN TO EXPERIENCE FLOODING. FOLLOW THE DIRECTION OF YOUR LOCAL EMERGENCY MANAGEMENT OFFICALS. IF ASKED TO EVACUATE...DO SO IMMEDIATELY. | | 56.0 | FLOODING WILL BECOME MORE WIDESPREAD FROM THE NEW HAMPSHIRE BORDER THROUGH HAVERHILL. THOSE AREAS OUTSIDE LOCAL FLOOD PROTECTION SHOULD TAKE MEASURES TO PROTECT PROPERTY. FOLLOW THE DIRECTIONS OF YOUR LOCAL EMERGENCY MANAGEMENT AGENCY. | | 55.0 | FLOODING WILL BECOME MORE WIDESPREAD FROM THE NEW HAMPSHIRE BORDER THROUGH HAVERHILL. THOSE AREAS OUTSIDE LOCAL FLOOD PROTECTION SHOULD TAKE MEASURES TO PROTECT PROPERTY. FOLLOW THE DIRECTIONS OF YOUR LOCAL EMERGENCY MANAGEMENT AGENCY. | | 52.0 | LOWLAND FLOODING IS LIKELY ALONG THE MERRIMACK RIVER. MOST OF THE IMPACT WILL BE FELT BY BUSINESSES AND MILLS WHERE BASEMENT FLOODING IS LIKELY. |
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1) 68.40 ft on 03/20/1936
2) 60.60 ft on 04/23/1852
3) 60.57 ft on 09/23/1938
4) 58.84 ft on 05/15/2006
5) 58.09 ft on 04/17/2007
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1) 0.00 ft on 09/09/1973
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