Alert archive / New York / Mesoscale Discussions in 2007

Mesoscale Discussion 1428

July 9, 200719 counties in New York; McKean County, Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2007, 1:25 PM EDT for 19 counties in New York; McKean County, Pennsylvania. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Jul 9, 2007, 1:25 PM EDT (17:25 UTC)
Expired
Jul 9, 2007, 3:00 PM EDT
In force
95 min
Issued by
the Storm Prediction Center

Counties Allegany County, NY, Cattaraugus County, NY, Cayuga County, NY, Chemung County, NY, Cortland County, NY, Fulton County, NY, Hamilton County, NY, Herkimer County, NY, Livingston County, NY, Madison County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tompkins County, NY, Wyoming County, NY, Yates County, NY, McKean County, PA

The radar

The Binghamton radar (KBGM), 99 km from the middle of the area, began a volume at 17:26 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 5.4 hours before the alert went out and 146 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.

Skew-T log-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2007-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 961 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2007-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
961 J/kg
Mixed-layer CIN
-144 J/kg
Mixed-layer LCL
1129 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.1
Supercell composite
4.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 9, 12:49 AM EDTMesoscale DiscussionSPCAlbany, Chenango, Fulton, Greene, Herkimer, Lewis and 9 more56 min
Jul 9, 10:56 AM EDTMesoscale DiscussionSPCClinton, Essex, Franklin, Warren, Washington64 min
Jul 9, 11:18 AM EDTSevere Thunderstorm WatchSPCClinton, Essex, Franklin, St. Lawrence6 hr
Jul 9, 1:50 PM EDTSevere Thunderstorm WatchSPCAlbany, Allegany, Broome, Cattaraugus, Cayuga, Chautauqua and 38 more7 hr
Jul 9, 4:03 PM EDTMesoscale DiscussionSPCAlbany, Allegany, Broome, Cattaraugus, Cayuga, Chautauqua and 41 more117 min
Jul 9, 4:42 PM EDTSevere Thunderstorm WatchSPCClinton, Essex, Franklin, St. Lawrence6 hr

Nearby

Mesoscale Discussions in New York, 2007Mesoscale Discussions in Pennsylvania, 2007Every mesoscale discussion in 2007

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.