Alert archive / New York / Mesoscale Discussions in 2012
Mesoscale Discussion 149
The Storm Prediction Center issued this mesoscale discussion at Feb 23, 2012, 11:48 PM EST for Berkshire County, Hampden County, Hampshire County, Massachusetts; 22 counties in New York; 5 counties in Pennsylvania. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 23, 2012, 11:48 PM EST (04:48 UTC)
- Expired
- Feb 24, 2012, 3:45 AM EST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 30 counties
Berkshire County, MA, Hampden County, MA, Hampshire County, MA, Albany County, NY, Allegany County, NY, Broome County, NY, Cattaraugus County, NY, Chemung County, NY, Chenango County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Dutchess County, NY, Greene County, NY, Livingston County, NY, Otsego County, NY, Schoharie County, NY, Schuyler County, NY, Steuben County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Ulster County, NY, Wyoming County, NY, Yates County, NY, Bradford County, PA, Potter County, PA, Susquehanna County, PA, Tioga County, PA, Wayne County, PA
The radar
The Binghamton radar (KBGM), 43 km from the middle of the area, began a volume at 04:52 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Albany, NY (KALY), launched 00:00Z, 4.8 hours before the alert went out and 150 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1335 m above ground
- 0-6 km bulk shear
- 93 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
275
ACUS11 KWNS 240448
SWOMCD
SPC MCD 240448
CTZ000-MAZ000-NYZ000-PAZ000-240845-
MESOSCALE DISCUSSION 0149
NWS STORM PREDICTION CENTER NORMAN OK
1048 PM CST THU FEB 23 2012
AREAS AFFECTED...FAR NRN PA...SRN NY...SRN NEW ENGLAND
CONCERNING...HEAVY SNOW
VALID 240448Z - 240845Z
THE POTENTIAL FOR HEAVY SNOW WILL INCREASE AFTER MIDNIGHT ACROSS FAR
NRN PA AND SRN NY WITH THE THREAT MOVING INTO SRN NEW ENGLAND TOWARD
DAYBREAK. SNOWFALL RATES COULD REACH 1 INCH PER HOUR ACROSS MUCH OF
THE MCD AREA OVER THE NEXT 4 TO 6 HOURS.
A BAND OF RAINFALL AND MIXED PRECIPITATION CURRENTLY EXTENDS FROM NE
OH EWD ACROSS NCNTRL PA ALONG THE NRN EDGE OF A STRONG LOW-LEVEL
JET. SFC TEMPS ALONG THIS CORRIDOR ARE GENERALLY IN THE MID 30S F TO
LOWER 40S BUT FURTHER TO THE NORTH...SFC TEMPS ARE NEAR FREEZING
ACROSS FAR NRN PA AND SRN NY. AS THE BAND OF PRECIPITATION MOVES
ENEWD AND INTO A COLDER AIRMASS...A TRANSITION TO HEAVY SNOW SHOULD
OCCUR. MODEL FORECASTS SUGGEST ISENTROPIC LIFT IS ALREADY QUITE
STRONG ACROSS NRN PA AND SRN NY WHICH SHOULD HELP TO ENHANCE
SNOWFALL RATES WITH 1 INCH PER HOUR RATES POSSIBLE AFTER MIDNIGHT.
THE HIGHEST SNOWFALL RATES SHOULD EXIST IN SW TO SCNTRL NY BEFORE
10Z WITH A GRADUAL SHIFT EWD INTO SE NY AND SRN NEW ENGLAND TOWARD
12Z.
..BROYLES.. 02/24/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...BOX...OKX...ALY...BGM...BUF...CTP...
LAT...LON 41517503 41607635 41717811 41987881 42337897 42617878
42747824 42737675 42697501 42587360 42447269 42277231
41957223 41617252 41467313 41517503Nearby
Mesoscale Discussions in New York, 2012Mesoscale Discussions in Pennsylvania, 2012Mesoscale Discussions in Connecticut, 2012Every mesoscale discussion in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.