Alert archive / New York / Mesoscale Discussions in 2012
Mesoscale Discussion 962
The Storm Prediction Center issued this mesoscale discussion at May 29, 2012, 3:26 PM EDT for Berkshire County, Massachusetts; 17 counties in New York; 14 counties in Vermont. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- May 29, 2012, 3:26 PM EDT (19:26 UTC)
- Expired
- May 29, 2012, 4:30 PM EDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 32 counties
Berkshire County, MA, Albany County, NY, Clinton County, NY, Columbia County, NY, Essex County, NY, Franklin County, NY, Fulton County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Montgomery County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, St. Lawrence County, NY, Warren County, NY, Washington County, NY, Addison County, VT, Bennington County, VT, Caledonia County, VT, Chittenden County, VT, Essex County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Rutland County, VT, Washington County, VT, Windham County, VT, Windsor County, VT
The radar
The Burlington radar (KCXX), 109 km from the middle of the area, began a volume at 19:26 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 7.4 hours before the alert went out and 118 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
- 1908 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 1026 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
081
ACUS11 KWNS 291926
SWOMCD
SPC MCD 291926
NHZ000-VTZ000-MAZ000-NYZ000-292030-
MESOSCALE DISCUSSION 0962
NWS STORM PREDICTION CENTER NORMAN OK
0226 PM CDT TUE MAY 29 2012
AREAS AFFECTED...ERN/UPSTATE NY...WRN MA...VT
CONCERNING...TORNADO WATCH 313...
VALID 291926Z - 292030Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 313 CONTINUES.
SUMMARY...TORNADO THREAT CONTINUES FOR THE WW AREA. SIGNIFICANT HAIL
AND DMGG WINDS ARE ALSO POSSIBLE WITH DISCRETE SUPERCELLS THAT CAN
DEVELOP. A SMALL SEVERE WW MAY BE NEEDED EAST OF WW313.
DISCUSSION...SEVERAL DISCRETE SUPERCELLS AND BROKEN LINES HAVE
DEVELOPED ACROSS THE WW AREA IN RESPONSE TO INCREASING HEIGHT FALLS
WITH THE UPPER TROUGH TO THE W. WITH THE SUBSEQUENT INCREASE IN
LOW-LEVEL SHEAR...A MORE NOTABLE STORM HAS DEVELOPED ALONG THE WARM
FRONT OVER FAR NERN VT/NWRN NH. VAD WIND PROFILE DATA AT BURLINGTON
SUGGESTS 175 M2/S2 0-3 KM SRH...WITH A LOCALIZED ENHANCEMENT LIKELY
GIVEN BACKED WINDS NEAR THE FRONTAL BOUNDARY. COMBINED WITH THE
AMBIENT AIR MASS...AN ISOLATED TORNADO REMAINS POSSIBLE. STORMS ARE
EXPECTED TO BECOME ELEVATED AS CONVECTION PROGRESSES INTO THE
UNSTABLE AIR MASS TO THE EAST OF THE WARM FRONT.
OVER UPSTATE NY...ANOTHER LINE OF STORMS HAS DEVELOPED NEAR THE
CANADA/U.S. BORDER...AND MAY GRADUALLY PROGRESS INTO THE WW AREA.
..HURLBUT.. 05/29/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...GYX...BOX...BTV...ALY...BGM...BUF...
LAT...LON 42057305 42167446 42847479 42937526 44107515 44407576
44607561 44907509 44997465 45027158 44717159 43927216
42057305SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 12:01 PM EDT | Mesoscale Discussion | SPC | Berkshire | 59 min |
| May 29, 12:26 PM EDT | Tornado Watch | SPC | Berkshire | 8 hr |
| May 29, 1:52 PM EDT | Mesoscale Discussion | SPC | Berkshire | 53 min |
| May 29, 3:44 PM EDT | Severe Thunderstorm Watch | SPC | Franklin, Hampden, Hampshire, Worcester | 5 hr |
| May 29, 7:01 PM EDT | Mesoscale Discussion | SPC | Hampden, Hampshire, Worcester | 89 min |
| May 29, 10:27 AM EDT | Severe Thunderstorm Watch | SPC | Allegany, Cattaraugus, Cayuga, Chautauqua, Jefferson, Lewis and 11 more | 5 hr |
| May 29, 11:43 AM EDT | Mesoscale Discussion | SPC | Albany, Broome, Cayuga, Chemung, Chenango, Columbia and 26 more | 62 min |
| May 29, 1:03 PM EDT | Severe Thunderstorm Watch | SPC | Broome, Chemung, Chenango, Cortland, Delaware, Madison and 5 more | 8 hr |
| May 29, 1:25 PM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 13 more | 65 min |
| May 29, 2:13 PM EDT | Mesoscale Discussion | SPC | Broome, Chemung, Chenango, Cortland, Delaware, Dutchess and 10 more | 62 min |
| May 29, 3:12 PM EDT | Mesoscale Discussion | SPC | Broome, Cayuga, Chemung, Chenango, Cortland, Delaware and 12 more | 63 min |
| May 29, 4:40 PM EDT | Mesoscale Discussion | SPC | Broome, Delaware, Otsego, Sullivan | 65 min |
| May 29, 5:54 PM EDT | Severe Thunderstorm Watch | SPC | Bronx, Kings, New York, Orange, Putnam, Queens and 3 more | 3 hr |
| May 29, 7:21 PM EDT | Mesoscale Discussion | SPC | Dutchess | 54 min |
Nearby
Mesoscale Discussions in New York, 2012Mesoscale Discussions in Vermont, 2012Mesoscale Discussions in Massachusetts, 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.