Current Blizzard Conditions
Posted by JAC on 2/1/2011, 8:33 am
http://www.youtube.com/user/usweathergov#g/c/44F1E0678D7F0852




MESOSCALE DISCUSSION 0064
  NWS STORM PREDICTION CENTER NORMAN OK
  0311 AM CST TUE FEB 01 2011
 
  AREAS AFFECTED...CNTRL/ERN OK...SERN KS...SW/WCNTRL MO
 
  CONCERNING...BLIZZARD
 
  VALID 010911Z - 011515Z
 
  DYNAMIC MID-LEVEL IMPULSE WAS BEGINNING TO CLOSE OFF ACROSS NCNTRL
  TX AT 09Z WITH INTENSE H7-H5 FRONTOGENETIC FORCING BECOMING
  ESTABLISHED FROM CNTRL OK INTO WRN MO.  MESOSCALE BANDING WAS
  INCREASING/NARROWING AS UPRIGHT/SLANTWISE INSTABILITY IS
  RELEASING...AND EXPECT SNOWFALL RATES TO CONTINUE INCREASING INTO
  THE 2-3" PER HOUR RANGE IN MOST INTENSE BANDS.
 
  LATEST RUC AND 00Z 4KM WRF-NMM APPEAR TO HAVE EXCELLENT HANDLE ON
  THE SCENARIO EVOLVING.  4KM MODEL SUGGESTS THAT CURRENT MESOSCALE
  BAND FROM CADDO COUNTY NWD INTO NCNTRL OK WILL REMAIN
  QUASISTATIONARY THROUGH 12-13Z WITH MORE DOMINANT BANDS EVOLVING
  WITH TIME FROM EAST OF KOKC-KTUL-MIDWAY BETWEEN KSZL/KAIZ IN WCNTRL
  MO BY 15Z.  PIVOT POINT WILL PROBABLY EVOLVE SOMEWHERE BETWEEN
  KOKC-KTUL WITH COLD CONVEYOR MAINTENANCE OF MDT-HVY SNOWFALL RATES
  IN CNTRL OK AND POINTS ENE THROUGH NOON.  SNOW RATIOS WILL BE
  MODERATE...AVERAGING 12:1...AND LATEST REPORT FROM PINK OK OF 2-3"
  PER HOUR RATES AGREES WITH THE 21Z SREF HIGH PROBABILITY OF THOSE
  RATES.  THE HEAVIEST SNOWFALL RATES WILL PEAK 12-15Z IN CNTRL
  OK...AND AFTER 15Z FROM NERN OK INTO WRN MO.
 
  THERE HAVE BEEN NUMEROUS GUSTS ABOVE 35 KTS AND LOW VISIBILITIES
  BENEATH THE STRONGEST SNOWBANDS.  WITH BOUNDARY LAYER WINDS EXPECTED
  TO REMAIN AOA THAT RANGE...BLIZZARD CONDITIONS WILL BE OBSERVED.
 
  ..RACY.. 02/01/2011
 




URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE ST LOUIS MO
432 AM CST TUE FEB 1 2011

...CRIPPLING WINTER STORM EXPECTED INTO WEDNESDAY...

.LIGHT FREEZING DRIZZLE WILL GIVE WAY TO A RAPIDLY EXPANDING AREA
OF MODERATE TO HEAVY SNOW...FREEZING RAIN...AND SLEET. BY LATE
MORNING...THIS AREA OF PRECIPITATION IS EXPECTED TO HAVE
OVERSPREAD THE ENTIRE REGION. PRECIPITATION WILL BE ALL SNOW FOR
AREAS NORTH AND WEST OF SAINT LOUIS. MUCH OF THE SAINT LOUIS METRO
AREA MAY INITIALLY SEE A SNOW AND SLEET MIX...BUT THIS SHOULD
BECOME ALL SNOW DURING THIS MORNING. FOR AREAS SOUTH AND EAST OF
SAINT LOUIS...LOOK FOR PRECIPITATION TO TRANSITION FROM A MIX OF
FREEZING RAIN...SLEET...AND SNOW TO ALL SNOW BY LATE THIS
AFTERNOON AND EARLY THIS EVENING.

THE GREATEST SNOWFALL AMOUNTS WILL OCCUR TO THE NORTH AND WEST OF
SAINT LOUIS CITY...WHERE ONE TO TWO FEET WILL BE LIKELY. ICE
ACCUMULATIONS OF ONE QUARTER TO THREE QUARTERS OF AN INCH ARE
EXPECTED FOR AREAS SOUTH AND EAST OF SAINT LOUIS...IN SOUTHEAST
MISSOURI AND SOUTHWEST ILLINOIS.

THE SNOW WILL END BY LATE TONIGHT OR WEDNESDAY MORNING BUT WINDS
WILL INCREASE TODAY AND CONTINUE THROUGH TONIGHT AND WEDNESDAY AS
THE STORM SYSTEM DEEPENS. BLOWING AND DRIFTING SNOW AS WELL AS AN
INCREASED RISK OF DAMAGE AND POWER OUTAGES DUE TO THE ICE
ACCUMULATION WILL LAST INTO WEDNESDAY.


ILZ058-095>099-MOZ018-019-026-027-034>036-041-042-047>052-059-060-
012300-
/O.CAN.KLSX.WS.W.0002.000000T0000Z-110201T1200Z/
/O.EXT.KLSX.BZ.W.0001.110201T1032Z-110202T1800Z/
GREENE IL-ADAMS IL-BROWN IL-PIKE IL-CALHOUN IL-JERSEY IL-KNOX MO-
LEWIS MO-SHELBY MO-MARION MO-MONROE MO-RALLS MO-PIKE MO-BOONE MO-
AUDRAIN MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO-
LINCOLN MO-GASCONADE MO-WARREN MO-
INCLUDING THE CITIES OF...QUINCY...HANNIBAL...BOWLING GREEN...
COLUMBIA...MEXICO...JEFFERSON CITY
432 AM CST TUE FEB 1 2011

...BLIZZARD WARNING NOW IN EFFECT UNTIL NOON CST WEDNESDAY...
...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS CANCELLED THE WINTER
STORM WARNING. THE BLIZZARD WARNING IS NOW IN EFFECT UNTIL NOON
CST WEDNESDAY.

* TIMING...FREEZING DRIZZLE WILL GIVE WAY TO A RAPIDLY EXPANDING
 AREA OF SNOW THIS MORNING. SNOW WILL BE HEAVY AT TIMES THROUGH
 THIS EVENING...ENDING LATER TONIGHT OR EARLY WEDNESDAY MORNING.

* ACCUMULATIONS...MINOR ADDITIONAL ICE ACCUMULATIONS CAN BE
 EXPECTED EARLY THIS MORNING. SNOW ACCUMULATIONS WILL RANGE FROM
 18 TO 24 INCHES.

* WINDS...NORTHERLY 15 TO 30 MPH WITH GUSTS TO 45 MPH...ESPECIALLY
 THIS AFTERNOON AND TONIGHT. SOME DIMINISHING WILL OCCUR ON
 WEDNESDAY.

* IMPACTS...EXTREMELY HAZARDOUS ROAD CONDITIONS FROM THE HEAVY
 SNOW ACCUMULATION AND EXTENSIVE BLOWING AND DRIFTING SNOW COULD
 LIMIT TRAVEL FOR DAYS...WITH SNOW DRIFTS OF SEVERAL FEET IN
 DEPTH. WHITE OUT CONDITIONS CAN ALSO BE EXPECTED...WITH ZERO
 VISIBILITIES AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WARNING IS ISSUED WHEN SUSTAINED WIND SPEEDS OR
FREQUENT GUSTS OF OVER 35 MPH ARE EXPECTED FOR SEVERAL HOURS WITH
CONSIDERABLE FALLING AND/OR BLOWING AND DRIFTING SNOW.
VISIBILITIES WILL BECOME POOR...WITH WHITEOUT CONDITIONS AT
TIMES...MAKING TRAVEL EXTREMELY DANGEROUS. THOSE VENTURING
OUTDOORS MAY BECOME LOST OR DISORIENTED...SO PERSONS IN THE
WARNING AREA ARE ADVISED TO STAY INDOORS.

&&

$$

ILZ059-060-100-MOZ061>064-012300-
/O.CAN.KLSX.WS.W.0002.000000T0000Z-110202T1800Z/
/O.EXB.KLSX.BZ.W.0001.110201T1032Z-110202T1800Z/
MACOUPIN IL-MONTGOMERY IL-MADISON IL-ST. CHARLES MO-FRANKLIN MO-
ST. LOUIS MO-ST. LOUIS CITY MO-
INCLUDING THE CITIES OF...LITCHFIELD...EDWARDSVILLE...
ST CHARLES...UNION...ST LOUIS
432 AM CST TUE FEB 1 2011

...BLIZZARD WARNING IN EFFECT UNTIL NOON CST WEDNESDAY...
...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A BLIZZARD
WARNING...WHICH IS IN EFFECT UNTIL NOON CST WEDNESDAY. THE WINTER
STORM WARNING HAS BEEN CANCELLED.

* TIMING...FREEZING DRIZZLE WILL GIVE WAY TO A RAPIDLY EXPANDING
 AREA OF SNOW THIS MORNING. THE SNOW MAY BRIEFLY MIX WITH SLEET
 OR FREEZING RAIN INITIALLY. SNOW WILL BE HEAVY AT TIMES THROUGH
 THIS EVENING...ENDING LATER TONIGHT OR EARLY WEDNESDAY MORNING.

* ACCUMULATIONS...MINOR ADDITIONAL ICE ACCUMULATIONS CAN BE
 EXPECTED EARLY THIS MORNING. SNOW ACCUMULATIONS WILL RANGE FROM
 10 TO 20 INCHES.

* WINDS...NORTHERLY INCREASING TO 15 TO 30 MPH WITH GUSTS TO 45
 MPH...ESPECIALLY THIS AFTERNOON AND TONIGHT. SOME DIMINISHING
 WILL OCCUR ON WEDNESDAY.

* IMPACTS...EXTREMELY HAZARDOUS ROAD CONDITIONS FROM THE HEAVY
 SNOW ACCUMULATION AND EXTENSIVE BLOWING AND DRIFTING SNOW COULD
 LIMIT TRAVEL FOR DAYS...WITH SNOW DRIFTS OF SEVERAL FEET IN
 DEPTH POSSIBLE. WHITE OUT CONDITIONS CAN ALSO BE EXPECTED...WITH
 ZERO VISIBILITIES AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WARNING IS ISSUED WHEN SUSTAINED WIND SPEEDS OR
FREQUENT GUSTS OF OVER 35 MPH ARE EXPECTED FOR SEVERAL HOURS WITH
CONSIDERABLE FALLING AND/OR BLOWING AND DRIFTING SNOW.
VISIBILITIES WILL BECOME POOR...WITH WHITEOUT CONDITIONS AT
TIMES...MAKING TRAVEL EXTREMELY DANGEROUS. THOSE VENTURING
OUTDOORS MAY BECOME LOST OR DISORIENTED...SO PERSONS IN THE
WARNING AREA ARE ADVISED TO STAY INDOORS.

&&

$$

ILZ101-102-MOZ065-072-073-012300-
/O.CON.KLSX.WS.W.0002.000000T0000Z-110202T1800Z/
ST. CLAIR IL-MONROE IL-JEFFERSON MO-CRAWFORD MO-WASHINGTON MO-
INCLUDING THE CITY OF...BELLEVILLE
432 AM CST TUE FEB 1 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST
WEDNESDAY...

A WINTER STORM WARNING FOR HEAVY SNOW AND SLEET REMAINS IN EFFECT
UNTIL NOON CST WEDNESDAY.

* TIMING...MODERATE TO HEAVY SNOW AND SLEET...BRIEFLY MIXING WITH
 FREEZING RAIN INITIALLY...WILL OVERSPREAD THE AREA EARLY THIS
 MORNING AND THEN CONTINUE HEAVY AT TIMES UNTIL EARLY THIS
 EVENING...TRANSITIONING TO ALL SNOW DURING THIS AFTERNOON AND
 TAPERING OFF TONIGHT. REDUCED VISIBILITIES WITH CONSIDERABLE
 BLOWING AND DRIFTING SNOW WILL CONTINUE INTO WEDNESDAY.

* ACCUMULATIONS...TOTAL ICE ACCUMULATIONS BETWEEN TWO TENTHS AND
 ONE HALF OF AN INCH ARE LIKELY. SLEET AND SNOW ACCUMULATIONS
 WILL RANGE FROM 5 TO 9 INCHES.

* WINDS...NORTHERLY INCREASING TO 15 TO 25 MPH WITH GUSTS TO 40
 MPH...ESPECIALLY THIS AFTERNOON AND TONIGHT. SOME DIMINISHING
 WILL OCCUR ON WEDNESDAY.

* IMPACTS...SIGNIFICANT ICE ACCUMULATION AND GUSTY NORTHWEST
 WINDS MAY LEAD TO WIDESPREAD POWER OUTAGES. THE COMBINATION OF
 ICE...SLEET AND SNOW WILL MAKE ROAD CONDITIONS EXTREMELY
 DANGEROUS AND THIS COULD LIMIT TRAVEL FOR DAYS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TRAVEL IS STRONGLY DISCOURAGED UNLESS IT IS AN EMERGENCY. AVOID
ANY DOWNED POWER LINES AND BE READY IN CASE OF A LOSS OF POWER.
UNTREATED ROADS AND BRIDGES...SIDEWALKS...AND PARKING LOTS WILL
BE TREACHEROUS. ADDITIONALLY...6 INCHES OR MORE OF SNOW IS
EXPECTED ACROSS PARTS OF THE AREA. THE RAPID ACCUMULATION OF SNOW
WILL MAKE TRAVEL EXTREMELY DIFFICULT...IF NOT IMPOSSIBLE. IF
TRAVEL IS NECESSARY... MAKE SURE TO EXERCISE CAUTION. BEGIN YOUR
TRAVEL WITH A TANK FULL OF GAS...AND CARRY A WINTER STORM KIT
WHICH INCLUDES A SHOVEL... FLASHLIGHT...CELLPHONE...AND BLANKETS
OF EXTRA WARM CLOTHING.

&&

$$

ILZ064-065-069-070-074-079-MOZ074-075-084-085-099-012300-
/O.CON.KLSX.WS.W.0002.000000T0000Z-110202T1800Z/
BOND IL-FAYETTE IL-CLINTON IL-MARION IL-WASHINGTON IL-RANDOLPH IL-
ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO-MADISON MO-REYNOLDS MO-
INCLUDING THE CITIES OF...VANDALIA...SALEM...CHESTER...FARMINGTON
432 AM CST TUE FEB 1 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST
WEDNESDAY...

A WINTER STORM WARNING FOR FREEZING RAIN...SLEET AND SNOW REMAINS
IN EFFECT UNTIL NOON CST WEDNESDAY.

* TIMING...FREEZING RAIN AND SLEET WILL CONTINUE INTO TONIGHT. THE
 PRECIPITATION WILL INCREASINGLY MIX WITH SNOW THIS AFTERNOON...
 BECOMING ALL SNOW BY THIS EVENING.

* ACCUMULATIONS...TOTAL ICE ACCUMULATIONS BETWEEN ONE QUARTER AND
 THREE QUARTERS OF AN INCH ARE LIKELY. SLEET AND SNOW
 ACCUMULATIONS OF UP TO 6 INCHES WILL BE POSSIBLE.

* WINDS...NORTHERLY INCREASING TO 15 TO 25 MPH WITH GUSTS TO 40
 MPH...ESPECIALLY THIS AFTERNOON AND TONIGHT. SOME DIMINISHING
 WILL OCCUR ON WEDNESDAY.

* IMPACTS...SIGNIFICANT ICE ACCUMULATION AND GUSTY NORTHWEST
 WINDS MAY LEAD TO WIDESPREAD POWER OUTAGES. THE COMBINATION OF
 ICE...SLEET AND SNOW WILL MAKE ROAD CONDITIONS EXTREMELY
 DANGEROUS AND THIS COULD LIMIT TRAVEL FOR DAYS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TRAVEL WILL BECOME DANGEROUS ONCE THE FREEZING RAIN BEGINS.
TRAVEL IS STRONGLY DISCOURAGED UNLESS IT IS AN EMERGENCY. AVOID
ANY DOWNED POWER LINES AND BE READY IN CASE OF A LOSS OF POWER.
UNTREATED ROADS AND BRIDGES...SIDEWALKS...AND PARKING LOTS WILL
BE TREACHEROUS. ADDITIONALLY...6 INCHES OR MORE OF SNOW IS
EXPECTED ACROSS PARTS OF THE AREA. THE RAPID ACCUMULATION OF SNOW
WILL MAKE TRAVEL EXTREMELY DIFFICULT...IF NOT IMPOSSIBLE. IF
TRAVEL IS NECESSARY... MAKE SURE TO EXERCISE CAUTION. BEGIN YOUR
TRAVEL WITH A TANK FULL OF GAS...AND CARRY A WINTER STORM KIT
WHICH INCLUDES A SHOVEL... FLASHLIGHT...CELLPHONE...AND BLANKETS
OF EXTRA WARM CLOTHING.

&&

$$

TES



61
In this thread:
Megastorm cranking up - JAC, 2/1/2011, 8:14 am
< Return to the front page of the: message board | monthly archive this page is in
Post A Reply
This thread has been archived and can no longer receive replies.