Ice storm warning

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Ice Covered Trees in Muncie, Indiana.

An Ice Storm Warning is issued by the National Weather Service of the United States when freezing rain produces a significant and possibly damaging accumulation of ice. The criteria for this warning vary from state to state, but typically an ice storm warning will be issued any time more than 14 inch (6.4 mm) of ice is expected to accumulate in an area; in some areas, the criterion is 12 inch (13 mm).[1]

A freezing rain advisory or freezing drizzle advisory will be issued when a small amount of icing is possible.

In Canada, a Freezing Rain Warning has the same meaning.

Example of an ice storm warning[edit]

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SPRINGFIELD MO
945 PM CST SUN DEC 9 2007

...CONDITIONS RAPIDLY DETERIORATING WEST OF HIGHWAY 65 THIS
EVENING...

.THE NEXT WAVE OF PRECIPITATION IS NOW SPREADING INTO SOUTHWEST
MISSOURI. AT 930 PM...RADAR INDICATED LIGHT TO MODERATE
PRECIPITATION EXTENDING FROM OSCEOLA IN ST. CLAIR COUNTY TO
NEOSHO IN NEWTON COUNTY. THIS BAND OF PRECIPITATION ALSO LIKELY
CONTAINS EMBEDDED THUNDERSTORMS PRODUCING HEAVY PRECIPITATION.
OTHER SCATTERED TO NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS
WERE ALSO DEVELOPING ACROSS EAST CENTRAL OKLAHOMA AND SPREADING
NORTHEAST TOWARDS SOUTH CENTRAL MISSOURI. MEANWHILE...THE FREEZING
LINE CONTINUES TO SLOWLY PUSH SOUTHEAST THIS EVENING. AT 9
PM...THE FREEZING LINE EXTENDED FROM BRANSON TO AVA IN DOUGLAS
COUNTY TO JUST SOUTH OF SALEM IN DENT COUNTY. THE FREEZING LINE
WILL NUDGE A BIT FARTHER TO THE SOUTH AND EAST OVERNIGHT BEFORE
STALLING ROUGHLY ALONG A LINE FROM RUETER IN SOUTHEAST TANEY
COUNTY TO WEST PLAINS TO WINONA IN SHANNON COUNTY. NORTH OF THIS
LINE...ICE ACCUMULATIONS ARE LIKELY FROM TONIGHT INTO MONDAY
MORNING. SIGNIFICANT ICE ACCUMULATIONS ARE EXPECTED NORTH OF A
CASSVILLE IN BARRY COUNTY TO SPARTA IN CHRISTIAN COUNTY TO SALEM
IN DENT COUNTY LINE. YET ANOTHER ROUND OF FREEZING RAIN IS AGAIN
POSSIBLE MONDAY NIGHT INTO TUESDAY.

KSZ073-097-101-MOZ055>058-066>071-077>083-088>095-101>103-101200-
/O.CON.KSGF.IS.W.0002.000000T0000Z-071210T1800Z/
/O.CON.KSGF.WS.A.0003.071210T1800Z-071212T0000Z/
BOURBON-CRAWFORD-CHEROKEE-BENTON-MORGAN-MILLER-MARIES-VERNON-
ST. CLAIR-HICKORY-CAMDEN-PULASKI-PHELPS-BARTON-CEDAR-POLK-DALLAS-
LACLEDE-TEXAS-DENT-JASPER-DADE-GREENE-WEBSTER-WRIGHT-NEWTON-
LAWRENCE-CHRISTIAN-MCDONALD-BARRY-STONE-
INCLUDING THE CITIES OF...FORT SCOTT...PITTSBURG...
BAXTER SPRINGS...COLUMBUS...WARSAW...COLE CAMP...VERSAILLES...
ELDON...LAKE OZARK...VIENNA...NEVADA...APPLETON CITY...OSCEOLA...
HERMITAGE...OSAGE BEACH...CAMDENTON...FORT LEONARD WOOD...
WAYNESVILLE...ROLLA...LAMAR...EL DORADO SPRINGS...STOCKTON...
BOLIVAR...BUFFALO...LEBANON...HOUSTON...CABOOL...SALEM...JOPLIN...
CARTHAGE...GREENFIELD...SPRINGFIELD...MARSHFIELD...ROGERSVILLE...
MOUNTAIN GROVE...MANSFIELD...NEOSHO...AURORA...MOUNT VERNON...
NIXA...OZARK...ANDERSON...PINEVILLE...MONETT...CASSVILLE...
KIMBERLING CITY...GALENA
945 PM CST SUN DEC 9 2007

...ICE STORM WARNING REMAINS IN EFFECT UNTIL 12 PM CST MONDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM MONDAY AFTERNOON
THROUGH TUESDAY AFTERNOON...

AN ICE STORM WARNING REMAINS IN EFFECT UNTIL 12 PM CST MONDAY. A
WINTER STORM WATCH REMAINS IN EFFECT FROM MONDAY AFTERNOON
THROUGH TUESDAY AFTERNOON.

ADDITIONAL ICE ACCUMULATIONS FROM A QUARTER TO A HALF OF AN INCH
WILL BE LIKELY TONIGHT INTO MONDAY MORNING...WITH LOCALIZED
HIGHER AMOUNTS. AREAS NORTH OF A CASSVILLE IN BARRY COUNTY TO
SPARTA IN CHRISTIAN COUNTY TO SALEM IN DENT COUNTY LINE CAN
EXPECT POWER OUTAGES...TREE DAMAGE...AND DETERIORATING ROAD
CONDITIONS AS A RESULT OF SIGNIFICANT ICE ACCUMULATION.

ANOTHER ROUND OF PRECIPITATION WILL LIKELY SPREAD OVER THE REGION
FROM MONDAY NIGHT INTO TUESDAY. SIGNIFICANT ICE ACCUMULATIONS...
UP TO ONE HALF OF AN INCH...WILL AGAIN BE POSSIBLE OVER PORTIONS
OF THE MISSOURI OZARKS AND SOUTHEAST KANSAS. THE MOST LIKELY AREA
FOR ADDITIONAL ICE ACCUMULATION WOULD BE NORTH OF INTERSTATE 44...
BUT THE EXACT LOCATION OF THE HEAVIEST ACCUMULATION REMAINS
UNCLEAR.

MAKE SURE YOU HAVE AN ADEQUATE SUPPLY OF FOOD. CHECK
PRESCRIPTIONS TO ENSURE AN ADEQUATE SUPPLY THROUGH THE DURATION
OF THE STORM. CHECK FURNACES AND FUEL LEVELS. DO NOT RUN
GENERATORS IN ENCLOSED AREAS! TRAVEL IS DISCOURAGED BUT IF
NECESSARY...MAKE SURE YOUR CAR IS WINTERIZED AND IN GOOD WORKING
ORDER AND CARRY ALONG A SAFETY SUPPLY KIT THAT INCLUDES FOOD...
BLANKETS AND A CELL PHONE.

POWER OUTAGES AND THE ACCUMULATION OF ICE ON TRANSMITTERS MAY
ALSO LEAD TO THE INTERRUPTION OF NOAA WEATHER RADIO BROADCASTS.

$$

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE PITTSBURGH PA
744 PM EST TUE JAN 15 2013

MDZ001-WVZ041-160845-
/O.CON.KPBZ.IS.W.0001.000000T0000Z-130116T1500Z/
GARRETT-TUCKER-
INCLUDING THE CITIES OF...OAKLAND MD...GRANTSVILLE...PARSONS...
DAVIS...THOMAS
744 PM EST TUE JAN 15 2013

...ICE STORM WARNING REMAINS IN EFFECT UNTIL 10 AM EST
WEDNESDAY...

* HAZARD TYPES...FREEZING RAIN...POSSIBLY BEGINNING AS A MIX
  WITH SLEET AND SNOW.

* ICE ACCUMULATIONS...ONE QUARTER TO ONE HALF OF AN INCH OF ICE.

* SLEET AND SNOW ACCUMULATIONS...LESS THAN ONE INCH.

* TIMING...A WINTRY MIX OF FREEZING RAIN...SLEET...AND SNOW WILL
  DEVELOP BEFORE 9 PM...AND CHANGE TO MOSTLY FREEZING RAIN
  THROUGH THE NIGHT.

* LOCATIONS...ALL OF GARRETT COUNTY...AND PARTICULARLY THE
  EASTERN HALF OF TUCKER COUNTY.

* IMPACTS...HAZARDOUS TRAVEL CONDITIONS ARE EXPECTED DUE TO ICE
  COVERED ROADS. POWER LINES MAY ALSO BE BROUGHT DOWN DUE TO ICE
  ACCUMULATION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AN ICE STORM WARNING MEANS THAT ICE ACCUMULATION WILL MAKE TRAVEL
DANGEROUS OR IMPOSSIBLE. ICE ACCUMULATION WILL LIKELY LEAD TO
SNAPPED POWER LINES AND FALLING TREE BRANCHES.  TRAVEL IS
STRONGLY DISCOURAGED.  REPORT ICE ACCUMULATION TO THE NATIONAL
WEATHER SERVICE BY CALLING 412-262-1988...POSTING TO THE NWS
PITTSBURGH FACEBOOK PAGE...OR USING TWITTER @NWSPITTSBURGH.

&&

$$

See also[edit]

References[edit]

  1. ^ National Weather Service. "Ice storm warning". Glossary - NOAA's National Weather Service. Retrieved 17 May 2011. 

External links[edit]