A stationary front located along the Canadian border provided a focus for heavy rain to develop during the evening of April 26. Up to 3 inches of rain fell in far northern New Hampshire.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GYX wrote it up.
A stationary front located along the Canadian border provided a focus for heavy rain to develop during the evening of April 26. Up to 3 inches of rain fell in far northern New Hampshire. This caused rivers and streams to rise to minor or moderate flood levels.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Gray, ME wrote its last area forecast discussion before the first event at Apr 30, 9:05 PM EST, 2 hours 55 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 1005 PM EDT SAT APR 30 2011 .SYNOPSIS... HIGH PRESSURE WILL GRADUALLY BUILD IN FROM THE WEST THROUGH SUNDAY. HIGH PRESSURE WILL SHIFT OFFSHORE ON MONDAY AS A COLD FRONT APPROACHES FROM THE WEST. THE FRONT WILL STALL OVER THE REGION BY TUESDAY. LOW PRESSURE WILL DEVELOP OVER SOUTHERN NEW ENGLAND WEDNESDAY AND THEN MOVE SLOWLY NORTHEAST TO EASTERN MAINE BY FRIDAY. && .NEAR TERM /OVERNIGHT/...UPDATED... SURFACE HIGH PRESSURE IS MOVING OVERHEAD TONIGHT...WITH LIGHT WINDS AND CLEAR SKIES. SHOULD BE A COLD NIGHT TONIGHT ACROSS THE ENTIRE REGION. DEWPOINTS HAVE BEEN DROPPING THIS EVENING IN RESPONSE TO DRIER AIR ALOFT BEHIND THE DEPARTING UPPER TROUGH. THIS DRIER AIR...COMBINED WITH CALM WINDS AND CLEAR SKIES...WILL ALLOW TEMPERATURES TO FALL INTO THE LOW 30S TO MID 20S ACROSS THE AREA. THE ONLY AREAS STILL MAINTAINING DEWPOINTS IN THE UPPER 30S TO NEAR 40 DEGREES ARE ALONG THE COAST WHERE A SEA BREEZE WAS ABLE TO SNEAK IN LATE THIS AFTERNOON. THIS MAY KEEP TEMPERATURES IN THE MID 30S ALONG THE COAST. && .SHORT TERM /SUNDAY/... SUNNY SKIES WITH HIGH PRESSURE CRESTING OVERHEAD. WINDS TURN TO ONSHORE ALONG THE COAST. USED THE MET WHICH ARE COOLER AT COASTAL LOCATIONS. && .LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/... HIGH PRES RIDGE AXIS AT SFC AND ALOFT WILL CONT OVER THE REGION THRU SUN WILL MOVE OFFSHORE AS A L/WV UPR TROF APPROACHES FROM THE W. L/WV TROF STALLS OVR ERN SEABOARD AND ALL MODELS AGREE ON UPPER LOW CLOSING OFF THE MID ATL CST WITH A COASTAL LOW DVLPG OFF THE SRN NEW ENGLD CST BY WED. THIS SYSTM WILL BE A BROAD AREA OF LOW PRES AND WILL SLOLY DRIFT NEWD TO ERN ME BY LATE FRI. NEEDLESS TO SAY AN UNSETTLED WEEK EXPECTED WITH SHWRS ALG WITH SOME PERIODS OF RN AS WELL. && .AVIATION /02Z SUNDAY THROUGH THURSDAY/... SHORT TERM...UPDATED...VFR CONDITIONS EXPECTED. LIGHT WINDS AND CLEAR SKIES THROUGH THE TAF PERIOD. MAY SEE A SEA BREEZE ALONG THE COAST SUNDAY AFTERNOON. LONG TERM...VFR UNTIL AN APPROACHING CD FNT BRINGS SHRA AND MVFR TO IFR CONDITIONS FROM W TO E ACROSS THE FCST AREA LATE MONDAY AND MONDAY NGT. MVFR TO IFR CONDITIONS EXPECTED TO CONT TUESDAY THRU WEDNESDAY. && .MARINE... SHORT TERM...WINDS WILL BRIEFLY PICK UP OVER THE WATERS LATE TONIGHT AS SFC LOW DEVELOPS OFFSHORE. DONT THINK WE WILL REACH SMALL CRAFT CRITERIA BUT IT WILL NEED WATCHING. LONG TERM...NO FLAGS...LIGHT GRAD WINDS EXPECTED THRU WED. && .FIRE WEATHER... DRY WEATHER THROUGH MONDAY...THEN UNSETTLED WITH RAIN SHOWERS THE REMAINDER OF THE WEEK. NO FIRE WEATHER ISSUES. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && SYNOPSIS...HAWLEY/MARINE NEAR TERM...UPDATE...KIMBLE SHORT TERM...HAWLEY LONG TERM...MARINE AVIATION...KIMBLE/MARINE MARINE...HAWLEY/MARINE FIRE WEATHER...HAWLEY
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAY ME 310 AM EDT SAT APR 30 2011 MEZ007>009-012>014-018>028-NHZ001>010-013-014-010715- NORTHERN OXFORD-NORTHERN FRANKLIN-CENTRAL SOMERSET-SOUTHERN OXFORD- SOUTHERN FRANKLIN-SOUTHERN SOMERSET-INTERIOR YORK- INTERIOR CUMBERLAND-ANDROSCOGGIN-KENNEBEC-INTERIOR WALDO- COASTAL YORK-COASTAL CUMBERLAND-SAGADAHOC-LINCOLN-KNOX-COASTAL WALDO- NORTHERN COOS-SOUTHERN COOS-NORTHERN GRAFTON-NORTHERN CARROLL- SOUTHERN GRAFTON-SOUTHERN CARROLL-SULLIVAN-MERRIMACK-BELKNAP- STRAFFORD-INTERIOR ROCKINGHAM-COASTAL ROCKINGHAM- 310 AM EDT SAT APR 30 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE...CENTRAL NEW HAMPSHIRE...NORTHERN NEW HAMPSHIRE AND SOUTHEASTERN NEW HAMPSHIRE. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ150>154-010715- STONINGTON ME TO PORT CLYDE ME OUT TO 25 NM-PENOBSCOT BAY- PORT CLYDE ME TO CAPE ELIZABETH ME OUT TO 25 NM-CASCO BAY- CAPE ELIZABETH ME TO MERRIMACK RIVER MA OUT TO 25 NM- 310 AM EDT SAT APR 30 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CASCO BAY...PENOBSCOT BAY...THE COASTAL WATERS FROM CAPE ELIZABETH ME TO MERRIMACK RIVER MA...THE COASTAL WATERS FROM PORT CLYDE ME TO CAPE ELIZABETH ME AND THE COASTAL WATERS FROM STONINGTON ME TO PORT CLYDE ME. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
The national radar mosaic for the moment the first event began.
2 flood. Local standard time, as filed.
Heavy rain at the end of April continued flooding into the 1st of May on the Connecticut River at Dalton (flood stage 17.0 ft), which crested at 22.1 ft.
Heavy rain at the end of April continued flooding into the 1st of May on the Connecticut River at West Lebanon (flood stage 18.0 ft), which crested at 19.7 ft.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New Hampshire in 2011Every state in 2011This day in weather historyWarnings in New Hampshire, May 2011
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 313365, 313367.