Alert archive / Pennsylvania / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 274
The Storm Prediction Center issued this severe thunderstorm watch at May 24, 2004, 12:40 PM EDT for 17 counties in New York; 29 counties in Pennsylvania; Hancock County, West Virginia. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 24, 2004, 12:40 PM EDT (16:40 UTC)
- Expired
- May 24, 2004, 5:00 PM EDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 47 counties
Allegany County, NY, Broome County, NY, Cattaraugus County, NY, Chemung County, NY, Chenango County, NY, Cortland County, NY, Livingston County, NY, Madison County, NY, Ontario County, NY, Otsego County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Wyoming County, NY, Yates County, NY, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Blair County, PA, Bradford County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Elk County, PA, Forest County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lycoming County, PA, McKean County, PA, Mifflin County, PA, Montour County, PA, Potter County, PA, Snyder County, PA, Sullivan County, PA, Tioga County, PA, Union County, PA, Warren County, PA, Westmoreland County, PA, Hancock County, WV
The radar
The State College radar (KCCX), 59 km from the middle of the area, began a volume at 16:39 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.
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 3:30 PM EDT | Severe Thunderstorm Warning | BGM | Madison, Oneida | 45 min |
| May 24, 4:31 PM EDT | Severe Thunderstorm Warning | BGM | Broome | 44 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 4.7 hours before the alert went out and 176 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
- 20 J/kg
- Mixed-layer CIN
- -121 J/kg
- Mixed-layer LCL
- 867 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -59 m²/s²
- 0-3 km storm-relative helicity
- -30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 11:02 PM EDT | Mesoscale Discussion | SPC | Cayuga, Essex, Fulton, Hamilton, Herkimer, Lewis and 8 more | 3 hr |
| May 24, 10:03 AM EDT | Mesoscale Discussion | SPC | Albany, Broome, Chemung, Chenango, Columbia, Cortland and 18 more | 117 min |
| May 24, 11:00 AM EDT | Severe Thunderstorm Watch | SPC | Albany, Bronx, Columbia, Delaware, Dutchess, Greene and 10 more | 5 hr |
| May 24, 12:24 PM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Chemung, Chenango, Cortland, Ontario and 6 more | 2 hr |
| May 24, 3:00 PM EDT | Mesoscale Discussion | SPC | Albany, Broome, Chenango, Cortland, Delaware, Fulton and 16 more | 90 min |
| May 24, 4:55 PM EDT | Severe Thunderstorm Watch | SPC | Albany, Broome, Chenango, Columbia, Cortland, Delaware and 23 more | 4 hr |
| May 24, 5:43 PM EDT | Mesoscale Discussion | SPC | Albany, Broome, Chenango, Columbia, Cortland, Delaware and 24 more | 47 min |
| May 24, 5:45 PM EDT | Severe Thunderstorm Watch | SPC | Rensselaer | 5 hr |
| May 24, 7:25 PM EDT | Mesoscale Discussion | SPC | Albany, Broome, Chenango, Columbia, Cortland, Delaware and 24 more | 95 min |
| May 24, 12:30 AM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 10 more | 6 hr |
| May 24, 2:09 AM EDT | Mesoscale Discussion | SPC | Greene, Washington | 2 hr |
| May 24, 4:55 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 10 more | 95 min |
Nearby
Severe Thunderstorm Watches in Pennsylvania, 2004Severe Thunderstorm Watches in New York, 2004Severe Thunderstorm Watches in West Virginia, 2004Every severe thunderstorm watch in 2004
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.