Alert archive / New York / Mesoscale Discussions in 2011
Mesoscale Discussion 989
The Storm Prediction Center issued this mesoscale discussion at May 26, 2011, 6:41 PM EDT for 22 counties in New York; 11 counties in Vermont. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- May 26, 2011, 6:41 PM EDT (22:41 UTC)
- Expired
- May 26, 2011, 7:45 PM EDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 33 counties
Albany County, NY, Broome County, NY, Chenango County, NY, Cortland County, NY, Delaware County, NY, Essex County, NY, Fulton County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Madison County, NY, Montgomery County, NY, Oneida County, NY, Otsego County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Tioga County, NY, Tompkins County, NY, Warren County, NY, Washington County, NY, Addison County, VT, Bennington County, VT, Caledonia County, VT, Chittenden County, VT, Essex County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Rutland County, VT, Washington County, VT, Windsor County, VT
The radar
The Albany radar (KENX), 55 km from the middle of the area, began a volume at 22:44 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, 10.7 hours before the alert went out and 54 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
- 1004 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 274 m²/s²
- 0-3 km storm-relative helicity
- 327 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
845
ACUS11 KWNS 262242
SWOMCD
SPC MCD 262241
NHZ000-VTZ000-NYZ000-PAZ000-262345-
MESOSCALE DISCUSSION 0989
NWS STORM PREDICTION CENTER NORMAN OK
0541 PM CDT THU MAY 26 2011
AREAS AFFECTED...CNTRL/NRN NY INTO VT
CONCERNING...TORNADO WATCH 380...382...
VALID 262241Z - 262345Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 380...382...CONTINUES.
THREAT OF DMGG WINDS...LARGE HAIL...AND TORNADOES CONTINUES ACROSS
MUCH OF NY AND VT.
A FORCED LINE OF STORMS HAS FORMED IN ADVANCE OF A SLOW MOVING COLD
FRONT...NOW ORIENTED ACROSS FAR NWRN PA/WRN NY NEWD INTO NRN VT. SLY
LOW LEVEL WINDS HAVE SUPPORTED AN INFLUX OF GREATER LOW LEVEL
MOISTURE...WHILE STRONG DIURNAL HEATING HAS EFFECTIVELY LED TO A
MODERATELY UNSTABLE AIR MASS EXTENDING FROM THE UPPER MID ATLANTIC
NWD INTO WRN NEW ENGLAND. A SERIES OF WEAK UPPER IMPULSES APPEAR TO
BE LEADING TO A FEW CLUSTERS OF STORMS ACROSS THE WW AREA...THOUGH
GENERALLY NEUTRAL HEIGHT CHANGE IS IMPEDING MORE WIDESPREAD
DEVELOPMENT. HOWEVER...STEEP MID LEVEL LAPSE RATES NEAR 8 C/KM PER
18Z ALBANY SOUNDING AND STRONG CLOUD-BEARING SHEAR IN EXCESS OF 50
KTS WILL CONTINUE TO SUPPORT OCCASIONALLY ROTATING STRONG TO SEVERE
STORMS.
..HURLBUT.. 05/26/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...GYX...BTV...ALY...BGM...
LAT...LON 41997532 42067666 42687669 43507521 44937243 44997153
44257201 43497255 42097416 41737497 41997532SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 11:55 AM EDT | Mesoscale Discussion | SPC | Broome, Cayuga, Chemung, Chenango, Cortland, Delaware and 15 more | 95 min |
| May 26, 12:29 PM EDT | Tornado Watch | SPC | Clinton, Essex, Franklin, St. Lawrence | 8 hr |
| May 26, 2:16 PM EDT | Tornado Watch | SPC | Albany, Broome, Cayuga, Chemung, Chenango, Cortland and 26 more | 8 hr |
| May 26, 2:57 PM EDT | Mesoscale Discussion | SPC | Albany, Broome, Chemung, Chenango, Clinton, Cortland and 20 more | 63 min |
| May 26, 5:49 PM EDT | Mesoscale Discussion | SPC | Sullivan | 56 min |
| May 26, 6:06 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Cattaraugus, Chautauqua, Erie, Livingston, Ontario and 1 more | 6 hr |
Nearby
Mesoscale Discussions in New York, 2011Mesoscale Discussions in Vermont, 2011Every mesoscale discussion in 2011
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.