Alert archive / New York / Flash Flood Warnings in 2009

Flash Flood Warning 20, NWS Binghamton, NY

August 9, 2009Delaware County, Sullivan County, New York

NWS Binghamton, NY issued this flash flood warning at Aug 9, 2009, 11:30 PM EDT for Delaware County, Sullivan County, New York. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 9, 2009, 11:30 PM EDT (03:30 UTC)
Expired
Aug 10, 2009, 4:56 AM EDT
In force
5 hr
Issued by
NWS Binghamton, NY
Area
Storm-based polygon
Flood severity
None

Counties Delaware County, NY, Sullivan County, NY

The radar

The Binghamton radar (KBGM), 96 km from the middle of the area, began a volume at 03:33 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

Brookhaven, NY (KOKX), launched 00:00Z, 3.5 hours before the alert went out and 206 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, Brookhaven, NY at 00:00Z on 2009-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 398 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, Brookhaven, NY at 00:00Z on 2009-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 205 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
398 J/kg
Mixed-layer CIN
-139 J/kg
Mixed-layer LCL
492 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
205 m²/s²
0-3 km storm-relative helicity
292 m²/s²
Significant tornado parameter
0.0
Supercell composite
9.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Binghamton, NY wrote its last area forecast discussion before this flash flood warning went out at Aug 9, 8:13 PM EDT, 3 hours 17 minutes earlier.

Area forecast discussion, Aug 9, 8:13 PM EDT, 3 hours 17 minutes before
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Hazardous weather outlook, Aug 9, 10:50 PM EDT, 40 minutes before
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In the hours before

Special weather statement, Aug 9, 6:32 PM EDT, 4 hours 58 minutes before
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Special weather statement, Aug 9, 6:58 PM EDT, 4 hours 32 minutes before
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Special weather statement, Aug 9, 7:40 PM EDT, 3 hours 50 minutes before
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Special weather statement, Aug 9, 9:23 PM EDT, 2 hours 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
923 PM EDT SUN AUG 9 2009

NYZ015>017-022>025-100400-
CHEMUNG-SCHUYLER-SENECA-SOUTHERN CAYUGA-STEUBEN-TOMPKINS-YATES-
923 PM EDT SUN AUG 9 2009

...STRONG TO SEVERE THUNDERSTORMS INBOUND FROM LAKE ONTARIO...

A LINE OF SEVERE THUNDERSTORMS MOVING RAPIDLY ACROSS LAKE ONTARIO
ARE FORECAST TO REACH LOCATIONS FROM GENEVA TO PENN YAN TO HORNELL
BETWEEN 11 PM AND 1130 PM. WIND GUSTS MAY EXCEED 50 MPH AS THESE
STORMS HIT.

THE LINE OF STORMS WILL THEN PROGRESS SOUTHWARD THROUGH THE REST OF
THE CENTRAL SOUTHERN TIER...INCLUDING ITHACA, WATKINS GLEN AND
ELMIRA/CORNING BY 1230 AM.

JAB
Special weather statement, Aug 9, 10:38 PM EDT, 52 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
1038 PM EDT SUN AUG 9 2009

NYZ015-016-022-023-100345-
SCHUYLER NY-SENECA NY-STEUBEN NY-YATES NY-
1038 PM EDT SUN AUG 9 2009

...LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN SCHUYLER...
NORTHERN STEUBEN...SOUTHERN SENECA AND YATES COUNTIES...

* AT 1038 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING STRONG GUSTY
  WINDS...AND VERY HEAVY RAIN.  THESE STORMS WERE LOCATED ALONG A
  LINE EXTENDING FROM 25 MILES NORTHWEST OF VINE VALLEY TO 24 MILES
  NORTHWEST OF WAYLAND TO 51 MILES WEST OF ARKPORT...AND MOVING
  SOUTHEAST AT 45 MPH.

* STRONG THUNDERSTORMS WILL BE NEAR...
  MIDDLESEX AT 1115 PM EDT...
  COHOCTON AND ARKPORT AT 1120 PM EDT...
  PENN YAN AT 1125 PM EDT...
  HORNELL AND AVOCA AT 1130 PM EDT...
  OVID AND HAMMONDSPORT AT 1135 PM EDT...
  DUNDEE AND BATH AT 1140 PM EDT...
  COVERT AT 1145 PM EDT...

THESE STORMS HAVE THE POTENTIAL TO BECOME SEVERE AND PRODUCE LARGE
HAIL AND/OR DAMAGING WINDS.

The office that day

Everything else NWS Binghamton, NY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 9, 8:51 PM EDTAreal Flood AdvisoryBGMBroome, Chenango3 hr
Aug 9, 9:29 PM EDTAreal Flood AdvisoryBGMCayuga, Onondaga3 hr
Aug 9, 10:00 PM EDTSevere Thunderstorm WarningBGMCayuga, Chenango, Cortland, Onondaga28 min
Aug 9, 11:15 PM EDTFlash Flood WarningBGMCayuga, Cortland, Onondaga6 hr
Aug 9, 11:17 PM EDTSevere Thunderstorm WarningBGMSteuben43 min
Aug 10, 12:00 AM EDTAreal Flood AdvisoryBGMChenango, Cortland3 hr
Aug 10, 12:49 AM EDTFlash Flood WarningBGMBroome, Chenango, Cortland, Delaware, Otsego6 hr
Aug 10, 2:06 AM EDTRiver Flood WarningBGMDelaware, Sullivan5 hr
Aug 10, 7:50 AM EDTFlash Flood WatchBGMBroome, Cayuga, Chemung, Chenango, Cortland, Delaware and 11 more14 hr
Aug 10, 2:56 PM EDTSevere Thunderstorm WarningBGMCayuga, Seneca, Yates49 min
Aug 10, 3:24 PM EDTAreal Flood AdvisoryBGMCayuga, Onondaga, Seneca4 hr
Aug 10, 3:43 PM EDTSevere Thunderstorm WarningBGMCayuga, Cortland, Onondaga, Seneca62 min
Aug 10, 3:46 PM EDTSevere Thunderstorm WarningBGMCayuga, Seneca, Tompkins44 min
Aug 10, 4:13 PM EDTSevere Thunderstorm WarningBGMChenango, Cortland, Madison, Onondaga, Tompkins62 min
Aug 10, 4:24 PM EDTTornado WarningBGMCortland, Tompkins30 min
Aug 10, 4:29 PM EDTSevere Thunderstorm WarningBGMMadison, Onondaga46 min
Aug 10, 4:38 PM EDTSevere Thunderstorm WarningBGMCayuga, Schuyler, Seneca, Tompkins, Yates52 min
Aug 10, 4:50 PM EDTSevere Thunderstorm WarningBGMBroome, Chenango, Cortland55 min
Aug 10, 4:56 PM EDTSevere Thunderstorm WarningBGMBroome, Cortland, Tompkins49 min
Aug 10, 5:00 PM EDTSevere Thunderstorm WarningBGMTioga60 min
Aug 10, 5:01 PM EDTFlash Flood WarningBGMCortland3 hr
Aug 10, 5:03 PM EDTSevere Thunderstorm WarningBGMMadison, Oneida57 min
Aug 10, 5:18 PM EDTFlash Flood WarningBGMTompkins3 hr
Aug 10, 5:23 PM EDTSevere Thunderstorm WarningBGMBroome, Chenango, Tioga52 min
Aug 10, 5:34 PM EDTSevere Thunderstorm WarningBGMBroome, Chenango, Delaware, Otsego56 min
Aug 10, 5:41 PM EDTFlash Flood WarningBGMBroome, Chenango3 hr
Aug 10, 5:55 PM EDTAreal Flood AdvisoryBGMBroome, Tioga117 min
Aug 10, 6:06 PM EDTSevere Thunderstorm WarningBGMDelaware54 min
Aug 10, 6:12 PM EDTSevere Thunderstorm WarningBGMBroome, Chenango, Delaware, Sullivan63 min
Aug 10, 6:15 PM EDTSevere Thunderstorm WarningBGMOneida30 min
Aug 10, 6:24 PM EDTSevere Thunderstorm WarningBGMSullivan66 min
Aug 10, 6:54 PM EDTSevere Thunderstorm WarningBGMDelaware, Sullivan66 min
Aug 10, 6:57 PM EDTAreal Flood AdvisoryBGMBroome, Delaware, Sullivan100 min
Aug 10, 5:31 PM EDTSevere Thunderstorm WarningBGMLackawanna44 min
Aug 10, 6:02 PM EDTAreal Flood AdvisoryBGMLackawanna3 hr

Nearby

Flash Flood Warnings in New York, 2009Every flash flood warning in 2009

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.