Alert archive / New York / Areal Flood Advisories in 2011

Areal Flood Advisory 25, NWS Buffalo, NY

May 15, 2011Chautauqua County, New York

NWS Buffalo, NY issued this areal flood advisory at May 15, 2011, 12:47 PM EDT for Chautauqua County, New York. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: May 15, 2011, 12:47 PM EDT (16:47 UTC)
Expired: May 15, 2011, 3:45 PM EDT
In force: 3 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 90 km from the middle of the area, began a volume at 16:47 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

Detroit, MI (KDTX), launched 12:00Z, 4.8 hours before the alert went out and 333 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 488 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 322 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Buffalo, NY wrote its last area forecast discussion before this areal flood advisory went out at May 15, 12:25 PM EDT, 22 minutes earlier.

Area forecast discussion, May 15, 12:25 PM EDT, 22 minutes before

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Hazardous weather outlook, May 15, 5:18 AM EDT, 7 hours 29 minutes before

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In the hours before

Special weather statement, May 15, 10:59 AM EDT, 1 hour 48 minutes before

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Special weather statement, May 15, 11:01 AM EDT, 1 hour 46 minutes before

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Special weather statement, May 15, 11:03 AM EDT, 1 hour 44 minutes before

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Special weather statement, May 15, 12:37 PM EDT, 10 minutes before

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Special weather statement, May 15, 12:39 PM EDT, 8 minutes before

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Special weather statement, May 15, 12:41 PM EDT, 6 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 10:06 PM EDT	Areal Flood Advisory	BUF	Genesee, Monroe, Orleans	3 hr
May 14, 10:13 PM EDT	Special Weather Statement	BUF	Erie	47 min
May 14, 10:58 PM EDT	Special Weather Statement	BUF	Erie	62 min
May 14, 11:38 PM EDT	Areal Flood Advisory	BUF	Erie, Niagara	3 hr
May 15, 1:01 AM EDT	Areal Flood Advisory	BUF	Genesee, Monroe, Orleans	3 hr
May 15, 4:15 AM EDT	Flood Watch	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	23 hr
May 15, 4:05 PM EDT	Areal Flood Advisory	BUF	Allegany	4 hr

Nearby

Areal Flood Advisories in New York, 2011 Every areal flood advisory in 2011

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.