Skip to content

Mesoscale Discussion 66

February 4, 2014

Mesoscale Discussion 66

mcd0066

MESOSCALE DISCUSSION 0066
NWS STORM PREDICTION CENTER NORMAN OK
0316 PM CST TUE FEB 04 2014

AREAS AFFECTED…MUCH OF IND…WRN AND NRN OH…FAR ERN IL

CONCERNING…HEAVY SNOW

VALID 042116Z – 050315Z

CORRECTED FOR TEXT ERROR

SUMMARY…SNOWFALL RATES ARE EXPECTED TO RAPIDLY INCREASE ACROSS IND INTO PARTS OF OH THIS EVENING…WITH 1-2 INCHES PER HR BECOMING COMMON. THIS THREAT WILL LIKELY INCLUDE THE INDIANAPOLIS AND DAYTON METRO AREAS.

DISCUSSION…HEAVY SNOWFALL WILL BECOME COMMON THROUGH 00Z ACROSS SRN/CNTRL IND…AND EVENTUALLY INTO WRN/NRN OH. THIS WILL OCCUR ALONG THE NRN FRINGE OF A SWATH OF HEAVY PRECIPITATION…ASSOCIATED WITH THE WARM CONVEYOR REGION OF AN UPSTREAM CYCLONE OVER THE CNTRL PLAINS. AS THIS SYSTEM GRADUALLY ACCELERATES NEWD AND ACQUIRES A SLIGHT NEGATIVE TILT…A SUBSEQUENT INCREASE IN DEEP-LAYER WIND FIELDS IS FORECAST TO OCCUR INVOF THE OH VALLEY.

FRONTOGENESIS IN THE 800-700 MB LAYER WILL BECOME MAXIMIZED JUST N OF THE OH RIVER BY EARLY EVENING ALONG THE EXIT REGION OF A LLJ…AND WILL COMBINE WITH STRENGTHENING ISENTROPIC ASCENT AND UPPER DIVERGENCE TO SUPPORT AN INCREASE IN PRECIPITATION RATES. ADDITIONALLY…THE AIR MASS REMAINS ANOMALOUSLY MOIST…WITH PW VALUES GENERALLY RANGING FROM 0.7-0.9 INCH. AS SUCH…RATES OF 1-2 PER INCHES PER HR WILL BECOME INCREASINGLY LIKELY INTO THE EVENING HRS /ESPECIALLY WITHIN CONCENTRATED SNOW BANDS/…AFFECTING THE INDIANAPOLIS AND DAYTON METRO AREAS…AS WELL AS SURROUNDING PORTIONS OF SRN/CNTRL IND AND W-CNTRL/NWRN OH.

Advertisements

From → Weather Blog

Leave a Comment

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: