Heavy Snow in New Hampshire, March 2, 2007

Name: Heavy Snow in New Hampshire, March 2, 2007
Start: 2007-03-02T02:00
End: 2007-03-02T17:00
Location: New Hampshire

March 2, 2007 · NWS GYX · 11 events in 11 counties and zones

Where it happened

Every event with a place to put it; 11 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 11

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.

What happened

The episode as NWS GYX wrote it up.

Low pressure over the Great Lakes in combination with a second low that developed off the mid-Atlantic coast brought heavy snow to the region. Along the immediate coast and in southern areas, the snow changed to rain before ending. Snowfall amounts ranged from 2 to 4 inches along the coast of Rockingham County to more than 6 inches in other parts of the region, with more than a foot in some locations.

What forecasters said that day

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 Mar 1, 9:42 PM EST, 4 hours 18 minutes earlier.

Area forecast discussion, Mar 1, 9:42 PM EST, 4 hours 18 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
942 PM EST THU MAR 1 2007

.SHORT TERM /REST OF TONIGHT THROUGH FRIDAY/...
980 MB LOW WAS CENTERED WEST OF CHICAGO AT 02Z. LATEST RADAR
MOSAIC SHOWS WARM AIR ADVECTION PRECIPITATION BREAKING OUT TO OUR
SOUTH AND WEST. THERE WAS ADDITIONAL ACTIVITY OVER OUR AREA...BUT
WITH BONE DRY 00Z KGYX RAOB PRECIPITATION WAS DRYING UP BEFORE
REACHING THE GROUND. THE MORE SIGNIFICANT SURGE OF MOISTURE WILL
ARRIVE AFTER MIDNIGHT AND REACH NORTHERN EXTENT OF THE FORECAST
AREA TOWARD DAWN. PROFILE IS PLENTY DRY AND COLD SO ONSET SHOULD
BE FROZEN IN ALL SECTIONS. LATEST NUMERICALS IN GOOD AGREEMENT
THAT SECONDARY WILL DEVELOP VICINITY OF THE DELMARVA BY 12Z
FRIDAY...THEN MAKE ITS WAY SLOWLY NORTHEAST ALONG THE COAST.
PROBLEM FOR FRIDAY REMAINS THE EXTENT OF MIX OR CHANGEOVER ALONG
THE COASTAL PLAIN BY FRIDAY AFTERNOON. I RAISED WINDS OVER THE
LAND ON FRIDAY BASED ON THE BUFKIT FORECAST SOUNDINGS AND ADDED
HEAVY AT TIMES TO PRECIPITATION FORECAST WORDING. 1ST PERIOD
HOURLY GRIDS WERE ADJUSTED BASED ON RADAR...SATELLITE...AND
MESONET. ALL DIGITAL AND TEXT PRODUCTS WERE UPDATED. ON THE
WATERS...I MADE MINOR ADJUSTMENTS TO THE SYNOPSIS AND FORECAST.

&&

.PREV DISCUSSION... /ISSUED 344 PM EST THU MAR 1 2007/

SHORT TERM /TONIGHT THROUGH FRIDAY/...
NO SIGNIFICANT CHANGES TO CURRENT FORECAST. MODELS SHOWING
IMPORTANT DIFFERENCES IN SPEED AND DEVELOPMENT OF COASTAL SFC
LOW...WITH GFS FURTHER WEST..TRACKING LOW FROM KCON-KCAR...AND WARMER
THAN NAM WHICH...WHICH TRACKS LOW RIGHT ALONG THE COAST. REG GEM
IS A NICE COMPROMISE BETWEEN THE TWO. RIGHT NOW...LEANING TOWARD
THE WETTER AND COLDER NAM. LOOKING AT CURRENT RADAR AND
SAT...ESPECIALLY WV...TROPICAL STREAM OF AIR PUMPING PLENTY OF
MOSITURE OUT OF THE GULF OF MEXICO...AND THIS MOISTURE WILL JUST
CONTINUE TO MOVE N. ALSO...12Z NAM INTIALIZED JET STREAK OVER TX
BETTER...AND GFS LOOKS LIKE IT IS HAVING SOME DIFFICULTY HANDLING
ONGOING CONVECTION. FAIRLY CERTAIN THERE WILL BE SOME MIXING ALONG
AND NEAR THE COAST...BUT THIS WILL NOT OCCUR UNTIL ABOUT 3/4 OF
THE QPF HAS FALLEN...WHICH STILL LEADS TO AT LEAST 6 INCHES OVER
SRN ZONES...WITH A FOOT JUST INLAND AND ALONG THE COAST FROM KPWM
NORTHEAST. IN THE MTNS...AND ESEPECIALLY THE FOOTHILLS...EXPECTING
A FOOT TO A FOOT AND A HALF. -CEMPA

LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/...
SECONDARY LOW FORECAST TO BE VICINITY OF ME BY 06Z SAT.  GFS PUTS
IT BETWEEN KAUG AND KBGR AT THAT TIME WHILE NAM SHOWS IT FURTHER
EAST IN THE GULF OF ME...MORE IN LINE WITH THE NGM.  PRECIPITATION
WILL BE TAPERING OFF TO SNOW SHOWER ACTIVITY FRI EVENING.  SNOW
SHOWER ACTIVITY WILL CONTINUE THROUGH THE REST OF THE WEEKEND...
ESPECIALLY OVER NORTHERN/MOUNTAIN SECTIONS.  WINDS ON BACK SIDE
OF THIS EVENT HOLD OFF TIL MON NIGHT AT WHICH TIME THEY INCREASE
AND ADVECT IN MORE OF A ARCTIC AIR MASS WITH TEMPERATURES BRIEFLY
GOING 15 DEGREES BELOW NORMAL ON TUE...REBOUNDING BACK TO NORMAL
BY THU AS A RIDGE OF HIGH PRESSURE DRIFTS ACROSS FORECAST AREA WED/
WED NIGHT. GFS NOW ADVERTISING NEXT STORM FOR NEXT THU.  -CEMPA

AVIATION...
VFR CONDITIONS THRU ABOUT MIDNIGHT...THEN SN WILL MOVE IN FROM THE
WEST...GETTING INOT KLEB ABOUT 5Z...AND REACHING KAUG BY 11Z.
THERE WILL BE A FEW HOURS OF IFR AT THE START BEFORE CONDITIONS
DROP TO LIFR/VLIFR...AND REMAIN THERE THRU THE MORNING. SOME
IP/FZRA WILL BE POSSIBLE BY MIDDAY AT ALL TERMINALS BUT KAUG.  -CEMPA

MARINE...
SHORT TERM...WILL KEEP THE STORM WRNG IN PLACE...AS DEEP ERLY FLOW
WILL STRENGTHEN IN ADVANCE OF COASTAL LOW...ESPECIALLY FRI
AFT/EVE. LONG TERM...GLW POSSIBLE MON NIGHT INTO TUE.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...WINTER STORM WARNING UNTIL 7 PM EST FRIDAY FOR MEZ007>009-
     012>014-018>028.

NH...WINTER STORM WARNING UNTIL 7 PM EST FRIDAY FOR NHZ001>010-013-
     014.

MARINE...STORM WARNING FROM 7 AM TO 7 PM EST FRIDAY FOR ANZ150.

&&

Hazardous weather outlook, Mar 1, 6:59 AM EST, 19 hours 1 minute before

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The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

11 heavy snow. Local standard time, as filed.

Heavy Snow, Belknap

When: March 2, 2:00 AM EST to 5:00 PM EST
Where: Belknap forecast zone
Reported by: Official NWS Observations
Coordinates: 43.519, -71.423 (the zone’s center; the record gives no point)

Heavy Snow, Interior Rockingham

When: March 2, 2:00 AM EST to 5:00 PM EST
Where: Interior Rockingham forecast zone
Reported by: Official NWS Observations
Coordinates: 42.985, -71.089 (the zone’s center; the record gives no point)

Heavy Snow, Merrimack

When: March 2, 2:00 AM EST to 5:00 PM EST
Where: Merrimack forecast zone
Reported by: Official NWS Observations
Coordinates: 43.298, -71.680 (the zone’s center; the record gives no point)

Heavy Snow, Northern Carroll

When: March 2, 2:00 AM EST to 5:00 PM EST
Where: Northern Carroll forecast zone
Reported by: Official NWS Observations
Coordinates: 43.874, -71.203 (the zone’s center; the record gives no point)

Heavy Snow, Northern Coos

When: March 2, 2:00 AM EST to 5:00 PM EST
Where: Northern Coos forecast zone
Reported by: Official NWS Observations
Coordinates: 44.690, -71.305 (the zone’s center; the record gives no point)

Heavy Snow, Northern Grafton

When: March 2, 2:00 AM EST to 5:00 PM EST
Where: Northern Grafton forecast zone
Reported by: Official NWS Observations
Coordinates: 43.941, -71.820 (the zone’s center; the record gives no point)

Heavy Snow, Southern Carroll

When: March 2, 2:00 AM EST to 5:00 PM EST
Where: Southern Carroll forecast zone
Reported by: Official NWS Observations
Coordinates: 43.874, -71.203 (the zone’s center; the record gives no point)

Heavy Snow, Southern Coos

When: March 2, 2:00 AM EST to 5:00 PM EST
Where: Southern Coos forecast zone
Reported by: Official NWS Observations
Coordinates: 44.690, -71.305 (the zone’s center; the record gives no point)

Heavy Snow, Southern Grafton

When: March 2, 2:00 AM EST to 5:00 PM EST
Where: Southern Grafton forecast zone
Reported by: Official NWS Observations
Coordinates: 43.941, -71.820 (the zone’s center; the record gives no point)

Heavy Snow, Strafford

When: March 2, 2:00 AM EST to 5:00 PM EST
Where: Strafford forecast zone
Reported by: Official NWS Observations
Coordinates: 43.297, -71.029 (the zone’s center; the record gives no point)

Heavy Snow, Sullivan

When: March 2, 2:00 AM EST to 5:00 PM EST
Where: Sullivan forecast zone
Reported by: Official NWS Observations
Coordinates: 43.361, -72.222 (the zone’s center; the record gives no point)

What these are

Heavy Snow: Snowfall reaching the local warning threshold without the other hazards of a winter storm.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in New Hampshire in 2007 Every state in 2007 This day in weather history Warnings in New Hampshire, March 2007

Sources

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 2026-10-01. Each event’s entry at NCEI: 24125, 24126, 24127, 24128, 24129, 24130, 24131, 24132, 24133, 24134, 24135.