Lake Effect Snow Advisory
Encyclopedia
A Lake Effect Snow Advisory is issued by the National Weather Service
of the United States
when lake effect snow
may pose a hazard or is life threatening. The snow must be completely caused by a convective snow development over a lake
and not by a low pressure system. The criteria for this advisory vary from area to area.
THE INTERSTATE 84 CORRIDOR.
SNOWFALL IS EXPECTED. THE POSSIBILITY OF UP TO 6 INCHES EXISTS
IN NORTHWESTERN SALT LAKE AND NORTHEASTERN TOOELE VALLEYS.
AND NORTHWESTERN SALT LAKE COUNTY AREAS THROUGH THIS AFTERNOON.
THE BAND IS EXPECTED TO SHIFT INTO THE SALT LAKE METRO AREA LATE
THIS AFTERNOON AND EVENING BEFORE SHIFTING NORTH INTO DAVIS
COUNTY. THE BAND IS EXPECTED TO DISSIPATE OVER DAVIS COUNTY
AROUND THE MIDDLE OF THE NIGHT.
FOR AREAS AFFECTED BY THIS LAKE EFFECT BAND. SNOWPACKED AND ICY
ROADS ARE LIKELY...AS WELL AS REDUCED VISIBILITIES BELOW 1/2
MILE DURING MODERATE TO AT TIMES BRIEF HEAVY SNOWFALL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A LAKE EFFECT SNOW ADVISORY MEANS LAKE-EFFECT SNOW SHOWERS ARE
EXPECTED OR OCCURRING AND TRAVEL WILL BE DIFFICULT IN SOME AREAS.
LAKE-EFFECT SNOW SHOWERS TYPICALLY ALIGN THEMSELVES IN BANDS AND
WILL LIKELY BE INTENSE ENOUGH TO PRODUCE SEVERAL INCHES IN
LOCALIZED AREAS WITH SUDDEN RESTRICTIONS IN VISIBILITY. USE
CAUTION WHEN TRAVELING.
FOR WINTER ROAD CONDITIONS FROM THE UTAH DEPARTMENT OF
TRANSPORTATION VISIT...HTTP://WWW.COMMUTERLINK.UTAH.GOV OR DIAL
511.
&&
$$
FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
National Weather Service
The National Weather Service , once known as the Weather Bureau, is one of the six scientific agencies that make up the National Oceanic and Atmospheric Administration of the United States government...
of the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
when lake effect snow
Lake effect snow
Lake-effect snow is produced during cooler atmospheric conditions when cold winds move across long expanses of warmer lake water, providing energy and picking up water vapor which freezes and is deposited on the leeward shores...
may pose a hazard or is life threatening. The snow must be completely caused by a convective snow development over a lake
Lake
A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...
and not by a low pressure system. The criteria for this advisory vary from area to area.
Examples
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1136 AM MST FRI DEC 31 2010
...LAKE EFFECT SNOW TO IMPACT THE WASATCH FRONT THROUGH MIDNIGHT TONIGHT...
.A WELL DEVELOPED LAKE EFFECT SNOW BAND IS EXPECTED TO REMAIN
INTACT INTO THE OVERNIGHT HOURS TONIGHT. THE BAND IS CURRENTLY
BRINGING MODERATE TO PERIODS OF HEAVY SNOW TO THE EASTERN TOOELE
AND NORTHWESTERN SALT LAKE VALLEY AREAS THIS AFTERNOON. THIS BAND
IS EXPECTED TO HOLD TOGETHER THROUGH OR JUST AFTER MIDNIGHT
TONIGHT...GRADUALLY SHIFTING THROUGH THE SALT LAKE VALLEY LATER
THIS AFTERNOON BEFORE DISSIPATING OVER DAVIS COUNTY.
UTZ002-003-010300-
/O.NEW.KSLC.LE.Y.0002.101231T1836Z-110101T0900Z/
NORTHERN WASATCH FRONT-SALT LAKE AND TOOELE VALLEYS-
INCLUDING THE CITIES OF...BRIGHAM CITY...OGDEN...BOUNTIFUL...
SALT LAKE CITY...TOOELE
1136 AM MST FRI DEC 31 2010
...LAKE EFFECT SNOW ADVISORY IN EFFECT UNTIL 2 AM MST SATURDAY...
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A LAKE
EFFECT SNOW ADVISORY...WHICH IS IN EFFECT UNTIL 2 AM MST
SATURDAY.
- AFFECTED AREA: THE WASATCH FRONT FROM THE TOOELE VALLEY NORTH TO
THE INTERSTATE 84 CORRIDOR.
- SNOW ACCUMULATIONS: GENERALLY 1 TO 4 INCHES OF ADDITIONAL NEW
SNOWFALL IS EXPECTED. THE POSSIBILITY OF UP TO 6 INCHES EXISTS
IN NORTHWESTERN SALT LAKE AND NORTHEASTERN TOOELE VALLEYS.
- TIMING: THE LAKE BAND IS EXPECTED TO BE OVER NORTHEASTERN TOOELE
AND NORTHWESTERN SALT LAKE COUNTY AREAS THROUGH THIS AFTERNOON.
THE BAND IS EXPECTED TO SHIFT INTO THE SALT LAKE METRO AREA LATE
THIS AFTERNOON AND EVENING BEFORE SHIFTING NORTH INTO DAVIS
COUNTY. THE BAND IS EXPECTED TO DISSIPATE OVER DAVIS COUNTY
AROUND THE MIDDLE OF THE NIGHT.
- IMPACTS: DRIVING CONDITIONS ARE EXPECTED TO DETERIORATE RAPIDLY
FOR AREAS AFFECTED BY THIS LAKE EFFECT BAND. SNOWPACKED AND ICY
ROADS ARE LIKELY...AS WELL AS REDUCED VISIBILITIES BELOW 1/2
MILE DURING MODERATE TO AT TIMES BRIEF HEAVY SNOWFALL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A LAKE EFFECT SNOW ADVISORY MEANS LAKE-EFFECT SNOW SHOWERS ARE
EXPECTED OR OCCURRING AND TRAVEL WILL BE DIFFICULT IN SOME AREAS.
LAKE-EFFECT SNOW SHOWERS TYPICALLY ALIGN THEMSELVES IN BANDS AND
WILL LIKELY BE INTENSE ENOUGH TO PRODUCE SEVERAL INCHES IN
LOCALIZED AREAS WITH SUDDEN RESTRICTIONS IN VISIBILITY. USE
CAUTION WHEN TRAVELING.
FOR WINTER ROAD CONDITIONS FROM THE UTAH DEPARTMENT OF
TRANSPORTATION VISIT...HTTP://WWW.COMMUTERLINK.UTAH.GOV OR DIAL
511.
&&
$$
FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
See also
- Lake Effect Snow WarningLake Effect Snow WarningA Lake Effect Snow Warning is a bulletin issued by the National Weather Service in the United States to warn of heavy snowfall amounts that are imminent from convective snow generated by very cold airmass passing over unfrozen lakes...
- Lake effect snowLake effect snowLake-effect snow is produced during cooler atmospheric conditions when cold winds move across long expanses of warmer lake water, providing energy and picking up water vapor which freezes and is deposited on the leeward shores...
- Severe weather terminology (United States)Severe weather terminology (United States)This article describes the United States National Weather Service severe weather terminology. The NWS defines precise meanings for nearly all its weather terms. This article describes NWS terminology and related NWS weather scales...