Alert archive / New York / Mesoscale Discussions in 2003
Mesoscale Discussion 2421
The Storm Prediction Center issued this mesoscale discussion at Sep 27, 2003, 6:39 AM EDT for 6 counties in New York. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Sep 27, 2003, 6:39 AM EDT (10:39 UTC)
- Expired
- Sep 27, 2003, 8:15 AM EDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
Counties Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Livingston County, NY, Wyoming County, NY
The radar
The Buffalo radar (KBUF), 64 km from the middle of the area, began a volume at 10:38 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
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 10.7 hours before the alert went out and 62 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
- 1576 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 248 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
688 ACUS11 KWNS 271039 SWOMCD SPC MCD 271039 NYZ000-PAZ000-271215- MESOSCALE DISCUSSION 2421 NWS STORM PREDICTION CENTER NORMAN OK 0539 AM CDT SAT SEP 27 2003 AREAS AFFECTED...WRN NY CONCERNING...TORNADO WATCH 934... VALID 271039Z - 271215Z STORMS HAVE REMAINED GENERALLY SUB-SEVERE ACROSS THIS REGION...THUS NEW WW WILL LIKELY NOT BE REQUIRED AS WW 934 EXPIRES AT 27/12Z. INSTABILITY CONTINUES TO DECREASE OVERALL ACROSS WRN NY ACCORDING TO OBJECTIVE ANALYSES. ADDITIONALLY...STRONGEST PRESSURE FALLS CONTINUE TO SHIFT NWD INTO ONTARIO / QUEBEC. THUS...DESPITE FAVORABLE WIND FIELD THERE APPEARS TO BE A CONTINUED DECREASE IN THE SEVERE THREAT ACROSS THIS REGION. AN ISOLATED STRONG / SEVERE STORM IS MOVING NEWD INTO ERIE COUNTY NY ATTM...AND OVERALL THE THREAT FOR AN ISOLATED SEVERE GUST WITH A STRONGER STORM OR TWO WILL CONTINUE FOR THE NEXT COUPLE OF HOURS. HOWEVER...IT APPEARS ATTM THAT NEW WW WILL NOT BE NEEDED BEYOND 27/12Z. ..GOSS.. 09/27/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...BGM...BUF...CTP...CLE... 42007983 42517971 43187741 42587732 41987786
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 1:58 AM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Cayuga, Erie, Genesee, Livingston and 9 more | 62 min |
| Sep 27, 2:35 AM EDT | Tornado Watch | SPC | Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 6 more | 5 hr |
| Sep 27, 2:22 PM EDT | Mesoscale Discussion | SPC | Broome, Cayuga, Chemung, Ontario, Schuyler, Seneca and 4 more | 113 min |
| Sep 27, 4:05 PM EDT | Severe Thunderstorm Watch | SPC | Cayuga, Chemung, Cortland, Onondaga, Ontario, Schuyler and 6 more | 5 hr |
| Sep 27, 6:52 PM EDT | Mesoscale Discussion | SPC | Cayuga, Ontario, Schuyler, Seneca, Steuben, Wayne and 1 more | 53 min |
Nearby
Mesoscale Discussions in New York, 2003Every mesoscale discussion in 2003
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.