Alert archive / New York / Mesoscale Discussions in 2012
Mesoscale Discussion 1903
The Storm Prediction Center issued this mesoscale discussion at Sep 6, 2012, 4:27 PM EDT for 20 counties in New York; 8 counties in Vermont. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Sep 6, 2012, 4:27 PM EDT (20:27 UTC)
- Expired
- Sep 6, 2012, 5:30 PM EDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
All 28 counties
Allegany County, NY, Broome County, NY, Chemung County, NY, Chenango County, NY, Clinton County, NY, Cortland County, NY, Essex County, NY, Franklin County, NY, Hamilton County, NY, Herkimer County, NY, Madison County, NY, Oneida County, NY, Onondaga County, NY, Otsego County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Yates County, NY, Addison County, VT, Chittenden County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Orleans County, VT, Rutland County, VT, Washington County, VT
The radar
The Albany radar (KENX), 91 km from the middle of the area, began a volume at 20:27 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 12:00Z, 8.5 hours before the alert went out and 93 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
- 816 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
605
ACUS11 KWNS 062027
SWOMCD
SPC MCD 062027
VTZ000-NYZ000-062130-
MESOSCALE DISCUSSION 1903
NWS STORM PREDICTION CENTER NORMAN OK
0327 PM CDT THU SEP 06 2012
AREAS AFFECTED...WRN/CNTRL AND UPSTATE NY...VT
CONCERNING...SEVERE THUNDERSTORM WATCH 626...
VALID 062027Z - 062130Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 626
CONTINUES.
SUMMARY...DISCRETE CELLS AND POSSIBLE SMALL BOWING SEGMENTS WILL
CONTINUE TO PRODUCE DMGG WINDS AND HAIL ACROSS THE WW AREA. STABLE
LOCATIONS IN THE WAKE OF THE LK BREEZE MAY BE CLEARED FROM THE WW.
DISCUSSION...THUNDERSTORMS APPEAR TO HAVE DEVELOPED IN RESPONSE TO A
SUBTLE VORT MAX /OBSERVED ON 1945Z WV ACROSS UPSTATE AND WRN
NY/...AS WELL AS VARIOUS LK BREEZES...PREFRONTAL SURFACE
TROUGHS...AND OROGRAPHIC FORCING ALONG THE ADIRONDACKS. ALTHOUGH
SEVERAL CELLS HAVE ACHIEVED SEVERE STATUS...ORGANIZED/STRONGER
BOWING SEGMENTS APPEAR TO BE PRIMARILY LIMITED BY VERY WEAK UPPER
FORCING AND WEAKER LOW LEVEL WINDS COMPARED TO EARLIER TODAY.
ADDITIONALLY...ANVIL CLOUDS FROM ONGOING CONVECTION ARE RAPIDLY
SPREADING ENEWD...LEADING TO SEVERAL DEGREES OF COOLING DOWNSTREAM
OF THE ONGOING STORMS. NONETHELESS...MODEST WLY FLOW ALOFT WILL
CONTINUE TO SUPPORT A FEW STRONGER CELLS WHERE THE AIR MASS REMAINS
MODERATELY UNSTABLE.
..HURLBUT.. 09/06/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...BTV...ALY...BGM...BUF...
LAT...LON 42027535 42037840 42647781 43277556 44617481 45067416
44967188 43977271 43317288 43317327 43767340 43707416
43227422 43227470 42677472 42507476 42027535SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 1:04 PM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Cayuga, Chemung, Clinton, Cortland and 20 more | 56 min |
| Sep 6, 2:50 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Broome, Cattaraugus, Cayuga, Chemung, Chenango and 26 more | 6 hr |
| Sep 6, 6:45 PM EDT | Mesoscale Discussion | SPC | Broome, Chemung, Chenango, Cortland, Delaware, Montgomery and 6 more | 60 min |
Nearby
Mesoscale Discussions in New York, 2012Mesoscale Discussions in Vermont, 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.