Alert archive / New York / Mesoscale Discussions in 2012
Mesoscale Discussion 825
The Storm Prediction Center issued this mesoscale discussion at May 16, 2012, 3:37 PM EDT for 28 counties in New York; 4 counties in Pennsylvania; 11 counties in Vermont. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- May 16, 2012, 3:37 PM EDT (19:37 UTC)
- Expired
- May 16, 2012, 5:30 PM EDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
All 43 counties
Albany County, NY, Broome County, NY, Chemung County, NY, Chenango County, NY, Clinton County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Essex County, NY, Franklin 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, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Bradford County, PA, Susquehanna County, PA, Wayne County, PA, Wyoming County, PA, Addison County, VT, Bennington County, VT, Chittenden County, VT, Franklin County, VT, Grand Isle 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), 60 km from the middle of the area, began a volume at 19:37 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, 7.6 hours before the alert went out and 73 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
- 304 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 484 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
678
ACUS11 KWNS 161937
SWOMCD
SPC MCD 161937
VTZ000-MAZ000-NYZ000-PAZ000-162130-
MESOSCALE DISCUSSION 0825
NWS STORM PREDICTION CENTER NORMAN OK
0237 PM CDT WED MAY 16 2012
AREAS AFFECTED...CNTRL AND ERN NY...WRN NEW ENGLAND
CONCERNING...SEVERE THUNDERSTORM WATCH 280...
VALID 161937Z - 162130Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 280
CONTINUES.
SUMMARY...A SEVERE THREAT PERSISTS ACROSS THE WATCH AREA WITH THE
GREATEST THREAT OVER CNTRL AND NRN PORTIONS.
DISCUSSION...STORMS CONTINUE TO DEVELOP OVER THE REGION...WITH THE
STRONGEST ACTIVITY FROM E CNTRL NY INTO VT WITH LIKELY HAIL AND
WIND. SURFACE OBSERVATIONS INDICATE RAPID DRYING WITH DEWPOINTS NOW
IN THE MID 40S F ACROSS NRN PA AND S CNTRL NY. FARTHER E...THE 18Z
ALB SOUNDING SHOWED SUBSTANTIALLY MORE LOW LEVEL MOISTURE NEAR THE
INSTABILITY AXIS WITH UPPER 50S TO LOW 60S F ON AVERAGE. MLCAPE WAS
NEAR 1000 J/KG USING THIS SOUNDING...A BIT LESS THAN PREVIOUSLY
FORECAST.
AREAS OF HEATING WILL CONTINUE AHEAD OF THE ONGOING STORMS...AND
SOME FURTHER INTENSIFICATION WILL BE POSSIBLE.
..JEWELL.. 05/16/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...BTV...ALY...BGM...BUF...CTP...
LAT...LON 41787725 42467691 43027599 44177481 45037402 45077239
44907202 44267222 43287253 42387333 41897365 41677450
41587499 41427608 41597687 41787725SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 12:27 PM EDT | Mesoscale Discussion | SPC | Albany, Broome, Chemung, Chenango, Clinton, Columbia and 22 more | 2 hr |
| May 16, 1:18 PM EDT | Severe Thunderstorm Watch | SPC | Albany, Broome, Chemung, Chenango, Clinton, Columbia and 24 more | 9 hr |
| May 16, 6:36 PM EDT | Mesoscale Discussion | SPC | Columbia, Rensselaer | 84 min |
Nearby
Mesoscale Discussions in New York, 2012Mesoscale Discussions in Vermont, 2012Mesoscale Discussions in Pennsylvania, 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.