词条 | Blizzard Watch |
释义 |
A Blizzard Watch was a bulletin issued by the National Weather Service of the United States which meant winds greater than {{convert|35|mph|kn km/h|0}}, mixed with falling or blowing snow, and visibilities of {{convert|1/4|mi|km|1}} or less is forecast for a period of 3 hours or more. A blizzard watch was issued 12 to 48 hours before an expected blizzard event. As the forecast solidifies, a blizzard watch would be either downgraded to a Winter Storm Warning or Winter Weather Advisory for blowing snow (depending on accumulation amounts) or upgraded to a Blizzard Warning. On October 2, 2017, issuance of the Blizzard Watch has been discontinued. A Winter Storm Watch is now issued in its place. Blizzard Warnings continue to be issued, however.[1] Example of a blizzard watchURGENT - WINTER WEATHER MESSAGENATIONAL WEATHER SERVICE CHICAGO IL1134 AM CST SUN JAN 30 2011...MAJOR WINTER STORM TO IMPACT THE REGION TUESDAY INTO WEDNESDAY....THE FIRST PHASE OF THE UPCOMING WINTER STORM WILL BEGIN MONDAYAFTERNOON THROUGH EARLY TUESDAY MORNING FOR NORTHERN ILLINOIS ANDNORTHWEST INDIANA. SNOWFALL TOTALS FROM THE FIRST PHASE APPEARS TOBE BETWEEN 2 AND 4 INCHES ACROSS NORTHERN ILLINOIS AND NORTHWESTINDIANA. THE FOCUS TURNS TOWARDS THE LARGER EVENT THAT PUSHES INTOTHE REGION TUESDAY AFTERNOON AND WILL PERSIST THROUGH WEDNESDAY.A DEVELOPING AREA OF LOW PRESSURE IS EXPECTED TO SLIDE EAST OF THEROCKIES INTO EASTERN TEXAS MONDAY NIGHT AND RAPIDLY STRENGTHEN ASIT SLIDES NORTH TUESDAY. THE PRECISE TRACK OF THE LOW CONTINUES TOWOBBLE WITH EACH NEW MODEL RUN...HOWEVER RELATIVE CONSISTENCY OF ATRACK FROM CENTRAL ARKANSAS NORTH TO CENTRAL INDIANA BY WEDNESDAYMORNING LOOKS TO BE THE MOST PROBABLE TRACK. THIS WOULD PLACE THEAXIS OF THE HEAVIEST SNOWFALL TO THE NORTHWEST OF THE TRACK OF THELOW PRESSURE...OR ACROSS MUCH OF NORTHERN ILLINOIS AND NORTHWESTINDIANA.AS THE LOW PRESSURE CONTINUES TO SLIDE NORTH AND STRENGTHEN...NORTHEASTWINDS OF 30 TO 40 MPH ARE EXPECTED TO DEVELOP AND BRING A FLOW OFCOLD AIR ACROSS LAKE MICHIGAN AIDING IN THE GENERATION OF LAKEEFFECT SNOW TUESDAY EVENING. WINDS WILL CONTINUE TO RAMP UP WITHSUSTAINED WINDS TUESDAY EVENING BETWEEN 25 AND 35 MPH WITH GUSTSUP TO 50 MPH POSSIBLE. NORTHEAST WINDS THEN CONTINUE TO STRENGTHENTUESDAY NIGHT INTO EARLY MORNING WEDNESDAY WITH GUSTS UP TO 55 MPHPOSSIBLE. THIS IN COMBINATION WITH THE FALLING SNOWFALL MAY CREATEBLIZZARD CONDITIONS AND WHITE OUT CONDITIONS. AS THE LOW PRESSURECONTINUES TO LIFT NORTH INTO CENTRAL INDIANA WEDNESDAYMORNING...WINDS WILL BEGIN TO TURN NORTHERLY AND BRING THE LAKEENHANCED SNOWFALL TO NORTHWEST INDIANA.BY LATER WEDNESDAY THE SNOW FROM THE DEPARTING WINTER STORM WILLBE WINDING DOWN ACROSS THE AREA BUT A BAND OF SIGNIFICANT LAKEEFFECT SNOW IS EXPECTED IN NORTHWEST INDIANA WHERE SEVERALADDITIONAL INCHES OF SNOW ARE POSSIBLE BEFORE THE LAKE EFFECTSHIFTS FURTHER OFF TO THE EAST INTO SOUTHWESTERN LOWER MICHIGANAND NORTH CENTRAL INDIANA.BETWEEN THE INITIAL LIGHTER SNOW MONDAY INTO TUESDAY MORNING...THE HEAVY SNOWFALL FROM THE MAJOR WINTER STORM DURING TUESDAYAFTERNOON THROUGH WEDNESDAY MORNING...AND THE INCREASINGLY INTENSELAKE EFFECT SNOW DEVELOPING DURING WEDNESDAY...IN EXCESS OF A FOOTAND A HALF OR MORE OF SNOW WILL NOT BE UNCOMMON OVER MUCH OFNORTHERN ILLINOIS AND FAR NORTHWEST INDIANA. SNOWFALL RATES UP TO3 INCHES PER HOUR WILL BE PROBABLE AT THE HEIGHT OF THE STORMTUESDAY NIGHT.THE STORM SYSTEM WILL BE AFFECTING A LARGE PORTION OF THESOUTHERN GREAT LAKES...MIDWEST AND OHIO VALLEY REGIONS. ANYONEWITH TRAVEL PLANS TUESDAY AND WEDNESDAY...INCLUDING THOSETRAVELING THROUGH CHICAGO OHARE AND MIDWAY AIRPORTS...SHOULDCONTINUE TO MONITOR LATER FORECASTS REGARDING THE DEVELOPMENT OFTHIS WINTER STORM..ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-310145-/O.CAN.KLOT.WS.A.0001.110201T1800Z-110203T0000Z//O.NEW.KLOT.BZ.A.0001.110201T1800Z-110203T0000Z/WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-IROQUOIS-FORD-LAKE IN-PORTER-NEWTON-JASPER-BENTON-INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...WOODSTOCK...WAUKEGAN...OREGON...DIXON...DEKALB...AURORA...WHEATON...CHICAGO...OTTAWA...OSWEGO...MORRIS...JOLIET...KANKAKEE...PONTIAC...WATSEKA...PAXTON...GARY...VALPARAISO...MOROCCO...RENSSELAER...FOWLER1134 AM CST SUN JAN 30 2011 /1234 PM EST SUN JAN 30 2011/...BLIZZARD WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGHWEDNESDAY AFTERNOON......WINTER STORM WATCH IS CANCELLED...THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A BLIZZARDWATCH...WHICH IS IN EFFECT FROM TUESDAY AFTERNOON THROUGHWEDNESDAY AFTERNOON. THE WINTER STORM WATCH HAS BEEN CANCELLED.* TIMING...HEAVY SNOWFALL WILL SPREAD NORTHEASTWARD ACROSS THE AREA MIDDAY TUESDAY AND CONTINUE THROUGH TUESDAY NIGHT. AS THE SNOWFALL FROM THE STORM SYSTEM STARTS TO WIND DOWN DURING WEDNESDAY MORNING AND EARLY AFTERNOON...LAKE EFFECT SNOW WILL HAVE DEVELOPED ON THE ILLINOIS SIDE OF THE LAKE. INCREASINGLY HEAVY AND MORE CONCENTRATED LAKE EFFECT SNOW WILL SHIFT INTO FAR NORTHWEST INDIANA DURING WEDNESDAY AFTERNOON AND PERSIST INTO WEDNESDAY EVENING BEFORE SHIFTING FURTHER OFF TO THE EAST INTO SOUTHWEST LOWER MICHIGAN AND NORTH CENTRAL INDIANA.* ACCUMULATIONS...TOTAL ACCUMULATIONS FROM MONDAY MORNING THROUGH WEDNESDAY EVENING ARE EXPECTED TO BE IN EXCESS OF 8 INCHES IN NORTH CENTRAL ILLINOIS...AND IN EXCESS OF 18 INCHES OVER NORTHEAST AND EAST CENTRAL ILLINOIS...AS WELL AS NORTHWEST INDIANA. LOCAL AMOUNTS IN EXCESS OF 24 INCHES ARE POSSIBLE IN FAR NORTHWEST INDIANA...DEPENDING ON EXACTLY WHERE THE LAKE EFFECT SNOW BAND SETS UP AND HOW PERSISTENT IT IS OVER ANY ONE LOCATION.* HAZARDS...BLIZZARD CONDITIONS WITH CONSIDERABLE BLOWING AND DRIFTING SNOW AND FREQUENT WHITE OUT CONDITIONS.* IMPACTS...NEARLY IMPOSSIBLE TRAVEL CONDITIONS AS SNOW WILL BE ACCUMULATING AT A RAPID RATE DURING THE PEAK OF THE SNOW STORM TUESDAY AFTERNOON AND NIGHT. HEAVY LAKE EFFECT SNOW IN NORTHWEST INDIANA LATER WEDNESDAY AND WEDNESDAY EVENING WILL CONTINUE TO SNARL TRAVEL THERE.PRECAUTIONARY/PREPAREDNESS ACTIONS...A BLIZZARD WATCH MEANS THERE IS A POTENTIAL FOR FALLING AND/ORBLOWING SNOW WITH STRONG WINDS AND EXTREMELY POOR VISIBILITIES.THIS CAN LEAD TO WHITEOUT CONDITIONS AND MAKE TRAVEL VERYDANGEROUS.$$TG/KD See also
References1. ^National Weather Service Hazard Simplification Retrieved 8 November 2017 External links
1 : Weather warnings and advisories |
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