Alert archive / New York / Flash Flood Warnings in 2014

Flash Flood Warning 17, NWS Buffalo, NY

July 30, 2014Niagara County, New York

NWS Buffalo, NY issued this flash flood warning at Jul 30, 2014, 3:45 PM EDT for Niagara County, New York. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 30, 2014, 3:45 PM EDT (19:45 UTC)
Expired: Jul 30, 2014, 6:45 PM EDT
In force: 3 hr
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Flood severity: None

County Niagara County, NY

The radar

The Buffalo radar (KBUF), 18 km from the middle of the area, began a volume at 19:48 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.8 hours before the alert went out and 20 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: 17 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1004 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

803 
WGUS51 KBUF 301945
FFWBUF
NYC063-302245-
/O.NEW.KBUF.FF.W.0017.140730T1945Z-140730T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
345 PM EDT WED JUL 30 2014

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN NIAGARA COUNTY IN WESTERN NEW YORK...
  THIS INCLUDES THE CITIES OF...NORTH TONAWANDA...NIAGARA FALLS...
  LOCKPORT...

* UNTIL 645 PM EDT

* AT 337 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4314 7905 4318 7906 4327 7848 4308 7847
      4310 7855 4307 7860 4309 7864 4308 7865
      4309 7873 4307 7874 4307 7880 4302 7885
      4307 7894 4308 7908

$$

RSH

2 follow-up statements

261 
WGUS71 KBUF 302040
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
440 PM EDT WED JUL 30 2014

NYC063-302245-
/O.CON.KBUF.FF.W.0017.000000T0000Z-140730T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NIAGARA NY-
440 PM EDT WED JUL 30 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM EDT FOR
SOUTHERN NIAGARA COUNTY...

AT 433 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WARNED 
AREA. ANOTHER BATCH OF THUNDERSTORMS...WITH TORRENTIAL DOWNPOURS AND 
CLOUD TO GROUND LIGHTNING WILL CROSS THE WARNED AREA THIS LATE 
AFTERNOON. ADDITIONAL RAINFALL TOTALS OF A HALF TO ONE AND A HALF 
INCHES OF RAIN COULD BRING ADDITIONAL FLASH FLOODING...ESPECIALLY 
FROM NEAR NIAGARA FALLS EASTWARD TO SANBORN...WHEATFIELD AND 
LOCKPORT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

&&

LAT...LON 4314 7905 4318 7906 4327 7848 4308 7847
      4310 7855 4307 7860 4309 7864 4308 7865
      4309 7873 4307 7874 4307 7880 4302 7885
      4307 7894 4308 7908

$$

THOMAS

561 
WGUS71 KBUF 302243
FFSBUF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
643 PM EDT WED JUL 30 2014

NYC063-302252-
/O.EXP.KBUF.FF.W.0017.000000T0000Z-140730T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NIAGARA NY-
643 PM EDT WED JUL 30 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 645 PM EDT FOR SOUTHERN
NIAGARA COUNTY...

AT 642 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE
THUNDERSTORMS THAT PROMPTED THE WARNING HAD EXITED THE AREA...THUS THE
FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 4314 7905 4318 7906 4327 7848 4308 7847
      4310 7855 4307 7860 4309 7864 4308 7865
      4309 7873 4307 7874 4307 7880 4302 7885
      4307 7894 4308 7908

$$

THOMAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 10:29 AM EDT	Special Marine Warning	BUF		61 min
Jul 30, 12:11 PM EDT	Special Weather Statement	BUF	Niagara, Orleans	79 min
Jul 30, 12:37 PM EDT	Areal Flood Advisory	BUF	Niagara, Orleans	3 hr
Jul 30, 12:53 PM EDT	Flash Flood Warning	BUF	Niagara	3 hr
Jul 30, 1:53 PM EDT	Small Craft Advisory	BUF		6 hr
Jul 30, 2:18 PM EDT	Special Weather Statement	BUF	Cattaraugus	27 min
Jul 30, 3:23 PM EDT	Special Weather Statement	BUF	Niagara, Orleans	52 min
Jul 30, 3:37 PM EDT	Special Weather Statement	BUF	Oswego	53 min

Nearby

Flash Flood Warnings in New York, 2014 Every flash flood warning in 2014

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.