Jump to content
  • Member Statistics

    17,508
    Total Members
    7,904
    Most Online
    joxey
    Newest Member
    joxey
    Joined

December 23-27th Storm System's/Severe Weather Potential


HillsdaleMIWeather

Recommended Posts

  • Replies 763
  • Created
  • Last Reply


DAY 1 CONVECTIVE OUTLOOK  

NWS STORM PREDICTION CENTER NORMAN OK  

0137 PM CST WED DEC 23 2015  

 

VALID 232000Z - 241200Z  

 

...THERE IS A MDT RISK OF SVR TSTMS ACROSS PORTIONS OF  

AR...MO...IL...IND...KY...TN...AL...MS...  

   

..THERE IS AN ENH RISK OF SVR TSTMS FROM NERN LA TO SWRN OH  

 

...THERE IS A SLGT RISK OF SVR TSTMS FROM THE CNTRL GULF COAST TO  

SRN LOWER MI...AND ACROSS THE CAROLINAS...  

 

...THERE IS A MRGL RISK OF SVR TSTMS SURROUNDING THE SLGT RISK FROM  

THE CAROLINA COAST TO NRN LOWER MI...  

   

..SUMMARY  

 

AN OUTBREAK OF SEVERE THUNDERSTORMS AND TORNADOES IS FORECAST TODAY  

INTO TONIGHT FROM THE OHIO VALLEY INTO THE TENNESSEE AND LOWER  

MISSISSIPPI VALLEYS. THE GREATEST RISK FOR A FEW  

INTENSE...LONG-TRACKED TORNADOES WILL EXIST OVER WESTERN TENNESSEE  

INTO NORTHERN MISSISSIPPI AND EASTERN ARKANSAS THIS AFTERNOON INTO  

TONIGHT.  

   

..DISCUSSION  

 

A FEW ADJUSTMENTS HAVE BEEN MADE TO 1630Z OUTLOOK...1) INCREASE  

SEVERE PROBS IMMEDIATELY AHEAD OF SFC LOW ALONG THE MO/IA BORDER 2)  

INCREASE SEVERE PROBS ACROSS THE CAROLINAS.  

 

1. LATEST VIS IMAGERY DEPICTS INCREASING CU FIELD AHEAD OF SFC LOW  

FROM THE IA/MO BORDER...SWD INTO CNTRL MO. WHILE LIGHTNING HAS YET  

TO DEVELOP IT APPEARS TSTMS WILL EVOLVE ACROSS THIS REGION AS  

CONVECTION DEEPENS. LARGE-SCALE FORCING IS FOCUSED ACROSS THIS  

REGION AND A PLUME OF STEEP SFC-3KM LAPSE RATES ARE NUDGING INTO  

CNTRL MO. THERE APPEARS TO BE AN INCREASING THREAT FOR SEVERE A BIT  

FARTHER NW THAN EARLIER INDICATED.  

 

2. OUTFLOW IS SURGING EWD ALONG LEADING EDGE OF LONG-LIVED MCS OVER  

SC. A FEW STRONG/SEVERE TSTMS ARE NOTED ALONG NRN EXTENT OF THIS  

LINE. BOUNDARY-LAYER MOISTURE IS ADVANCING NWD ACROSS THE CAROLINAS  

WITHIN STRONGLY SHEARED ENVIRONMENT SUPPORTIVE OF SUPERCELLS. HAVE  

INCREASED SEVERE PROBS TO ACCOUNT FOR ISOLATED TORNADOES AND  

DAMAGING WIND POTENTIAL.  

 

ACROSS THE MDT RISK...CONVECTION CONTINUES TO INCREASE IN INTENSITY  

AND COVERAGE ALONG A CORRIDOR FROM CNTRL AR...NEWD INTO WRN KY.  

TORNADO THREAT WILL INCREASE ACROSS THIS REGION AS THE AFTERNOON  

PROGRESSES...IN LINE WITH EARLIER THOUGHTS.  

 

..DARROW.. 12/23/2015  

Link to comment
Share on other sites

Looking good for Kentucky and Ohio later today with the currently evolving QLCS. Low level shear is forecast to be very strong...I'm actually extremely surprised at the northern extent of the ENH risk area.

I do think Ohio looks good right now with instability. At last check Cincinatti was 67 degrees with a 65 dew point and hasn't seen any rain today to stabilize the atmosphere.

Link to comment
Share on other sites

No Watch... Yet, due to lack of instability right now:

 

MESOSCALE DISCUSSION 2043
NWS STORM PREDICTION CENTER NORMAN OK
0155 PM CST WED DEC 23 2015

AREAS AFFECTED...PORTIONS OF NRN IND...NWRN OH...AND SRN LOWER MI

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 231955Z - 232130Z

PROBABILITY OF WATCH ISSUANCE...20 PERCENT

SUMMARY...ISOLATED STRONG/GUSTY WINDS MAY BE POSSIBLE WITH A LINE OF
FORCED CONVECTION MOVING EWD OVER THE NEXT SEVERAL HOURS. DUE TO THE
VERY LIMITED THERMODYNAMIC ENVIRONMENT...WW ISSUANCE IS UNLIKELY AT
THIS TIME.

DISCUSSION...IN ASSOCIATION WITH LARGE-SCALE ASCENT AHEAD OF A
SHORTWAVE TROUGH...A LINE OF SHALLOW...FORCED CONVECTION HAS
DEVELOPED OVER PORTIONS OF NRN IND AND FAR SRN LOWER MI. WHILE
KINEMATICS ARE FAVORABLE FOR STORM ORGANIZATION ACROSS NRN
IND...NWRN OH...AND SRN LOWER MI AHEAD OF THE LINE...A VERY MARGINAL
THERMODYNAMIC ENVIRONMENT IS IN PLACE ACROSS THE MCD AREA...WITH
MUCAPE AOB 200 J/KG PER RAP MESOANALYSIS. WITH WIDESPREAD CLOUDINESS
AND DEWPOINTS EXPECTED TO REMAIN IN THE MID TO UPPER 50S OVER THE
NEXT SEVERAL HOURS EVEN WITH SLY LOW-LEVEL WINDS...IT REMAINS
UNCLEAR WHETHER INSTABILITY WILL INCREASE ENOUGH TO ALLOW THIS LINE
OF CONVECTION TO BECOME CAPABLE OF PRODUCING STRONG TO LOCALLY
DAMAGING WINDS AND/OR A BRIEF TORNADO OVER THE NEXT SEVERAL HOURS.
AT THIS TIME...WW ISSUANCE APPEARS UNLIKELY...MAINLY DUE TO THE LACK
OF STRONGER INSTABILITY.

Link to comment
Share on other sites

Unlikely that activity makes it that far east and is severe.

 

GRR Disagreees with you:

 

ISSUED AT 255 PM EST WED DEC 23 2015

SHOWERS AND EVEN A FEW THUNDERSTORMS ROLLING IN AT THIS TIME.

CONSIDERING THE HIGH SHEAR/LOW ELEVATED CAPE ENVIRONMENT...ANY

SHOWER OR THUNDERSTORM COULD CONTAIN GUSTS OVER 40 MPH. A SEVERE

STORM OR TWO IS POSSIBLE. OVER THE NEXT FEW HOURS IT APPEARS THE

LINE APPROACHING JACKSON AND BATTLE CREEK WILL HAVE AN INCREASED

RISK FOR STRONGER WINDS. THESE CELLS COULD MAKE A RUN AT LANSING

BY 6 PM.

DRY SLOT MOVES IN BY 02Z. WE MAINTAIN CAPE THROUGH MUCH OF THE

EVENING...PRIOR TO THE FRONTAL PASSAGE. WIND FIELDS INCREASE AS

THE FRONT ARRIVES. THE CELLS DEVELOPING IN MO AT THIS TIME SEEM TO

BE ALONG THE FRONT THAT HEADS OUR WAY TO NIGHT. WE SHOULD MONITOR

THIS REGION AND INTO ILLINOIS CONCERNING CONVECTIVE TRENDS. VERY

LOW TOPPED TRW/RW WILL BE POSSIBLE WITH THE FRONTAL PASSAGE

TONIGHT. THE MAIN TIMEFRAME IS FROM 03Z TO 07Z. A SIMILAR EVENT

BACK IN DEC 23 2007 DID PRODUCE FAIRLY WIDESPREAD WIND DAMAGE

WITH NO LIGHTNING. THUS A SEVERE RISK STILL EXISTS. WIND ADVISORY

LOOKS GOOD AND WE MAY NEAR WARNING CRITERIA ALONG AND BEHIND THE

FRONT.

 

They feel once the dry slot moves in it will boost up the Instability to cause an event a la 12/23/07

Link to comment
Share on other sites

Looking good for Kentucky and Ohio later today with the currently evolving QLCS. Low level shear is forecast to be very strong...I'm actually extremely surprised at the northern extent of the ENH risk area.

 

 

 

I haven't had much interest in this event being on the eastern flanks of the threat area.     But now that the sun is making a bit of an appearance, temps rising in the mid 60's, and healthy looking radar returns firing in IN,   I'm officially at least mildly interested.  Only mildly because  I've seen this scenario many times in the warm season, where the good stuff fires up in IN in the late afternoon and by the time it reaches us after dark it's a 30 min windy rain storm and a clap of thunder or two.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...