Heavy snow warning

A Heavy snow warning was a weather warning issued by the National Weather Service of the United States during times when a high rate of snowfall was occurring or was forecast. Generally, the warning was issued for snowfall rates of 4 inches (10 cm) or more in 12 hours, or 6 inches (15 cm) or more in 24 hours.

This warning was discontinued beginning with the 2008-09 winter storm season, replaced by the Winter Storm Warning for Heavy Snow.

A similar warning is issued by Environment Canada's Meteorological Service of Canada

Example of a heavy snow warning

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE FAIRBANKS AK
221 PM AST SUN DEC 9 2007

.A STORM SYSTEM MOVING NORTH OVER THE CENTRAL BERING SEA WILL MOVE
TO SOUTHWEST OF SAINT LAWRENCE ISLAND MONDAY AFTERNOON. THE STORM
WILL BRING SNOW AND EAST WINDS OF 30 TO 45 MPH TONIGHT OVER MUCH
OF WESTERN ALASKA FROM THE YUKON DELTA TO THE SEWARD PENINSULA
TONIGHT. WINDS WILL DIMINISH EARLY MONDAY BUT SNOW IS EXPECTED TO
CONTINUE THROUGH MONDAY AFTERNOON.

AKZ212-100600-
/X.CON.PAFG.HS.W.0011.071210T0000Z-071211T0200Z/
EASTERN NORTON SOUND AND NULATO HILLS-
INCLUDING...UNALAKLEET...STEBBINS...ST MICHAEL...ELIM...KOYUK...
SHAKTOOLIK
221 PM AST SUN DEC 9 2007

...HEAVY SNOW WARNING REMAINS IN EFFECT UNTIL 5 PM AST MONDAY...

A HEAVY SNOW WARNING REMAINS IN EFFECT UNTIL 5 PM AST MONDAY.

SNOW WILL SPREAD INTO THE AREA SOUTH OF UNALAKLEET THIS
AFTERNOON...AND WILL SPREAD NORTH TONIGHT...AND CONTINUE INTO
MONDAY. SNOWFALL ACCUMULATION OF 6 TO 10 INCHES ARE EXPECTED WITH
HIGHEST AMOUNTS ACROSS THE NULATO HILLS. EAST WINDS WILL INCREASE
TONIGHT TO 25 TO 35 MPH AND SOME VISIBILITIES WILL BE REDUCED TO
ONE-QUARTER MILE AT TIMES IN BLOWING SNOW.

A HEAVY SNOW WARNING MEANS HAZARDOUS WINTER WEATHER IS EXPECTED.
THE ACCUMULATION OF NEW SNOW WILL MAKE TRAVEL DIFFICULT.

$$

External links

Severe weather terminology in the United States

Severe
storms

Thunderstorm	Advisory Watch PDS Watch Warning

Tornado	Watch PDS Watch Warning PDS Warning Emergency

Marine Thunderstorm	Special marine warning

Winter
weather

Advisories	Winter Weather Advisory

Winter storm	Watch Warning

Blizzard/Blowing Snow	Blowing Snow advisory Blizzard watch Blizzard warning

Heavy snow	Warning

Lake-effect snow	Advisory Watch Warning

Ice	Freezing rain advisory Ice storm warning

Tropical
Cyclones

Tropical storms	Watch Warning

Hurricanes	Watch Warning

Inland Advisories	Inland Tropical Storm Watch Inland Tropical Storm Warning Inland Hurricane Watch Inland Hurricane Warning

Hurricane Local Statement

Flood

Flood	Watch Warning

Flash flood	Watch PDS Watch Warning Emergency

Coastal flood	Advisory Watch Warning

Lakeshore flood	Advisory Watch Warning Seiche Warning

River flood	Advisory Watch Warning

Urban and small stream flood	Advisory

Apparent
temperature

Heat index	Heat advisory Excessive heat watch Excessive heat warning

Wind chill	Advisory Watch Warning PDS Warning

Extreme cold	Watch Warning

Freeze	Watch Warning Hard Freeze Warning Frost Advisory

Maritime
and
coastal
weather

Marine Winds	Small craft advisory Brisk wind advisory Lake Wind Advisory

Gale	Watch Warning

Storm	Watch Warning

Hurricane Force Wind	Watch Warning

Hazardous Seas	Watch Warning

Freezing Spray	Freezing spray advisory Heavy freezing spray watch Heavy freezing spray warning

High Surf	Advisory Warning

Wind

Advisory-Force Winds	Wind Advisory

Gale-Force Winds	High wind watch High wind warning

Major Hurricane-Force Winds	Extreme wind warning

Airborne
particulates

Dust/sand	Blowing Dust Advisory Dust Storm Warning

Fog/Smoke	Dense Fog Advisory Dense Smoke Advisory

Ash	Ashfall Advisory

Air pollution	Air Stagnation Advisory

Fire

Aviation

Center Weather Advisory
SIGMET
Volcanic Ash Advisory

Weather scales
used by NWS

Beaufort (wind)
Enhanced Fujita (tornadoes)
Saffir-Simpson Hurricane Scale (tropical cyclones)

Other

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Heavy snow warning

Example of a heavy snow warning

See also

External links