Alert archive / New York / Flash Flood Warnings in 2015

Flash Flood Warning 18, NWS Buffalo, NY

July 14, 2015Cattaraugus County, New York

NWS Buffalo, NY issued this flash flood warning at Jul 14, 2015, 7:51 PM EDT for Cattaraugus County, New York. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 14, 2015, 7:51 PM EDT (23:51 UTC)
Expired: Jul 14, 2015, 10:45 PM EDT
In force: 3 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

County Cattaraugus County, NY

The radar

The Buffalo radar (KBUF), 63 km from the middle of the area, began a volume at 23:52 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.

What was reported inside it

Time	Report	Where	Remark
Jul 14, 9:25 PM EDT	FLASH FLOOD	5 Nw Ashford, NY	ROUTE 219 CLOSED IN BOTH DIRECTIONS BETWEEN ASHFORD HOLLOW ROAD AND BEAVER MEADOW ROAD DUE TO FLOODING

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 11.9 hours before the alert went out and 61 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: 63 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 862 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

776 
WGUS51 KBUF 142351
FFWBUF
NYC009-150245-
/O.NEW.KBUF.FF.W.0018.150714T2351Z-150715T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
751 PM EDT TUE JUL 14 2015

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL CATTARAUGUS COUNTY IN WESTERN NEW YORK...

* UNTIL 1045 PM EDT
    
* AT 749 PM EDT...DOPPLER RADAR INDICATED ANOTHER AREA OF 
  THUNDERSTORMS DEVELOPING ACROSS CENTRAL CATTARAUGUS COUNTY. THIS 
  AREA WILL PRODUCE ANOTHER INCH TO INCH AND A HALF OF RAIN IN THE 
  WARNED AREA. THIS IS IN ADDITION TO THE RAINFALL WHICH FELL 
  EARLIER TODAY. THIS WILL RESULT IN ADDITIONAL FLASH FLOODING IN 
  THE WARNED AREA.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ASHFORD...FRANKLINVILLE...ASHFORD HOLLOW...NEW ALBION...
  CONEWANGO...LEON...LITTLE VALLEY AND EAST OTTO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4238 7905 4248 7870 4247 7870 4251 7859
      4227 7842 4219 7904

$$

APFFEL

1 follow-up statement

909 
WGUS71 KBUF 150114
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
914 PM EDT TUE JUL 14 2015

NYC009-150245-
/O.CON.KBUF.FF.W.0018.000000T0000Z-150715T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CATTARAUGUS NY-
914 PM EDT TUE JUL 14 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT FOR
CENTRAL CATTARAUGUS COUNTY...

AT 905 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
HEAVY RAIN ACROSS THE WARNED AREA. SINCE 800 PM DOPPLER RADAR HAS 
ESTIMATED BETWEEN AN INCH TO AN INCH AND A HALF OF RAINFALL HAS 
FALLEN OVER THE WARNED AREA. ADDITIONAL RAINFALL OF A HALF INCH OR 
MORE IS POSSIBLE...MAINLY OVER CENTRAL AND EASTERN PORTIONS OF 
CATTARAUGUS COUNTY. CREEKS AND STREAMS CAN CONTINUE TO RISE EVEN 
AFTER THE RAIN ENDS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4238 7905 4248 7870 4247 7870 4251 7859
      4227 7842 4219 7904

$$

THOMAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 11:58 PM EDT	Special Weather Statement	BUF	Chautauqua	92 min
Jul 14, 12:20 AM EDT	Flash Flood Warning	BUF	Chautauqua	4 hr
Jul 14, 4:03 AM EDT	Areal Flood Warning	BUF	Chautauqua	6 hr
Jul 14, 4:10 AM EDT	Flash Flood Watch	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	21 hr
Jul 14, 4:16 AM EDT	Small Craft Advisory	BUF		35 hr
Jul 14, 8:40 AM EDT	Special Weather Statement	BUF	Chautauqua	20 min
Jul 14, 9:22 AM EDT	Special Weather Statement	BUF	Chautauqua	23 min
Jul 14, 9:27 AM EDT	Special Weather Statement	BUF	Chautauqua	18 min
Jul 14, 9:50 AM EDT	Flash Flood Warning	BUF	Cattaraugus, Chautauqua, Erie	4 hr
Jul 14, 1:47 PM EDT	Flash Flood Warning	BUF	Cattaraugus, Chautauqua, Erie	3 hr
Jul 14, 2:25 PM EDT	Special Weather Statement	BUF	Cattaraugus	50 min
Jul 14, 2:42 PM EDT	Special Weather Statement	BUF	Oswego	63 min
Jul 14, 3:04 PM EDT	Flash Flood Warning	BUF	Allegany, Cattaraugus, Erie, Wyoming	3 hr
Jul 14, 3:23 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	67 min
Jul 14, 3:52 PM EDT	Flash Flood Warning	BUF	Allegany, Cattaraugus, Livingston, Wyoming	3 hr
Jul 14, 4:18 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston, Wyoming	34 min
Jul 14, 4:19 PM EDT	Tornado Warning	BUF	Allegany	26 min
Jul 14, 5:24 PM EDT	Areal Flood Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie	5 hr

Nearby

Flash Flood Warnings in New York, 2015 Every flash flood warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.