[spotters-illianaskywarn] Fwd: NOAA's National Weather Service SPC Mesoscale Discussion Update
- From: Keith Reedy <keithreedy@xxxxxxxxxxxx>
- To: "spotters-illianaskywarn@xxxxxxxxxxxxx" <spotters-illianaskywarn@xxxxxxxxxxxxx>
- Date: Wed, 26 Dec 2012 10:54:19 -0500
Keith Reedy
keithreedy@xxxxxxxxxxxx
Begin forwarded message:
> From: GovDelivery Weather Updates <weatherupdates@xxxxxxxxxxxxxxxxxxxxxx>
> Subject: NOAA's National Weather Service SPC Mesoscale Discussion Update
> Date: December 26, 2012 10:50:55 AM EST
> To: keithreedy@xxxxxxxxxxxx
> Reply-To: GovDelivery Weather Updates <weatherupdates@xxxxxxxxxxxxxxxxxxxxxx>
>
>
>
> You are subscribed to SPC Mesoscale Discussion for NOAA's National Weather
> Service.
> GovDelivery provides this service using unaltered NOAA/NWS products.
>
>
> SPC MD 2233
> 12/26/2012 10:40 AM EST
>
> MD 2233 CONCERNING BLIZZARD FOR CNTRL/NRN INDIANA...W-CNTRL/NWRN/N-CNTRL OH
>
>
> MESOSCALE DISCUSSION 2233
> NWS STORM PREDICTION CENTER NORMAN OK
> 0939 AM CST WED DEC 26 2012
>
> AREAS AFFECTED...CNTRL/NRN INDIANA...W-CNTRL/NWRN/N-CNTRL OH
>
> CONCERNING...BLIZZARD
>
> VALID 261539Z - 262145Z
>
> SUMMARY...THE THREAT FOR BLIZZARD CONDITIONS WILL EXPAND NEWD FROM
> CNTRL INDIANA/W-CNTRL OH INTO NWRN/N-CNTRL OH. THESE CONDITIONS WILL
> LIKELY CONTINUE THROUGH THE AFTERNOON.
>
> DISCUSSION...WATER VAPOR IMAGERY DEPICTS A LARGE EXTRATROPICAL
> CYCLONE IN ITS MATURE STAGE OVER THE ERN CONUS. A WELL-DEFINED WARM
> CONVEYOR BELT ASSOCIATED WITH AMPLE WARM ADVECTION AROUND THE
> ERN/NRN SEMICIRCLES OF THE DEEP CYCLONE WILL CONTINUE TO SUPPORT A
> NEWD EXPANSION OF HEAVY SNOW FROM CNTRL INDIANA/W-CNTRL OH INTO
> NWRN/N-CNTRL OH INTO THIS AFTERNOON. THE STRENGTH OF ISENTROPIC
> ASCENT WILL BE AUGMENTED BY A MODEST CONVECTIVE ENHANCEMENT OWING TO
> NARROW ELEVATED CAPE LAYERS TO SUPPORT HEAVY SNOW WITH RATES OF
> 1-1.5 IN/HR. OBSERVATIONS ACROSS W-CNTRL OH INDICATE THIS
> INSTABILITY BEING MANIFESTED AS THUNDERSNOW...AND A LIGHTNING STRIKE
> OR TWO MAY ACCOMPANY THE MOST INTENSE SNOW RATES INTO THE AFTERNOON.
>
> STRONG LOW-LEVEL FLOW ACCOMPANYING THE COLD CONVEYOR BELT ATTENDANT
> TO THE CYCLONE WILL SUPPORT 30-40 KT MEAN FLOW IN THE 0-1-KM LAYER
> PER FORECAST SOUNDINGS. RELATIVELY STEEP LAPSE RATES IN THE LOWEST
> KILOMETER AGL WILL SUPPORT 20-30 MPH WINDS AND FREQUENT GUSTS OF
> 30-40 MPH. THE STRONGEST OF THESE WINDS WILL LIE WITHIN A CORRIDOR
> FROM CNTRL INDIANA INTO NWRN OH WHERE THE TIGHTEST SFC PRESSURE
> GRADIENT IS EXPECTED TO EXIST. THESE WINDS WILL COMBINE WITH THE
> SNOW TO CREATE WHITEOUT CONDITIONS AND A BLIZZARD THREAT.
> OBSERVATIONS ACROSS CNTRL IND SUGGEST VISIBILITIES OF ONE-QUARTER
> MILE WITH HEAVY SNOW...AND SIMILAR CONDITIONS WILL LIKELY AFFECT THE
> DISCUSSION AREA INTO THE AFTERNOON.
>
> ..COHEN.. 12/26/2012
>
> ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
>
> ATTN...WFO...CLE...ILN...IWX...IND...
>
> LAT...LON 41278224 40758251 40548311 39998396 39588449 39428594
> 39688648 40118666 40918632 41548550 41678466 41658364
> 41478280 41278224
>
> Read more
>
>
>
> To change your subscriptions or preferences log in to your Subscriber
> Preferences Page with your e-mail address.
>
> Delete profile
>
> For questions or problems with the subscription service, please contact
> support@xxxxxxxxxxxxxxx.
>
>
> The use of the logo does not imply an endorsement by the NOAA/NWS
>
> GovDelivery provides this service using unaltered NOAA/NWS products. ·
> 1-800-439-1420
Other related posts:
