Alert archive / New York / Flash Flood Warnings in 2011
Flash Flood Warning 41, NWS New York, NY
NWS New York, NY issued this flash flood warning at Sep 28, 2011, 4:43 PM EDT for Suffolk County, New York. It was in force for 4 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
- Sep 28, 2011, 4:43 PM EDT (20:43 UTC)
- Expired
- Sep 28, 2011, 8:15 PM EDT
- In force
- 4 hr
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Flood severity
- None
County Suffolk County, NY
The radar
The Brookhaven radar (KOKX), 11 km from the middle of the area, began a volume at 20:47 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
Brookhaven, NY (KOKX), launched 12:00Z, 8.7 hours before the alert went out and 11 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.
- Mixed-layer CAPE
- 161 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 567 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
180
WGUS51 KOKX 282043
FFWOKX
NYC103-282245-
/O.NEW.KOKX.FF.W.0041.110928T2043Z-110928T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
443 PM EDT WED SEP 28 2011
THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SUFFOLK COUNTY IN SOUTHEAST NEW YORK...
* UNTIL 645 PM EDT...
* AT 436 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A HEAVY SHOWERS OVER THE WARNED AREA. RAINFALL
RATES OF 1 TO 1 1/2 INCHES PER HOUR ARE OCCURRING WITH THESE SHOWERS.
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.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN UPTON
NY.
&&
LAT...LON 4072 7294 4073 7289 4076 7288 4076 7291
4074 7293 4074 7296 4097 7313 4097 7277
4099 7262 4104 7253 4096 7245 4099 7249
4092 7261 4092 7247 4095 7245 4087 7237
4071 7293
$$4 follow-up statements
475
WGUS71 KOKX 282128
FFSOKX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
528 PM EDT WED SEP 28 2011
NYC103-282245-
/O.CON.KOKX.FF.W.0041.000000T0000Z-110928T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUFFOLK NY-
528 PM EDT WED SEP 28 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM EDT FOR
SUFFOLK COUNTY...
AT 525 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE HEAVY TROPICAL LIKE SHOWERS TRACKING NORTHWARD OVER THE
WARNED AREA. THE AXIS OF HEAVY PRECIP HAS SHIFTED EASTWARD...BUT
ANOTHER AREA OF HEAVY SHOWERS OVER THE ATLANTIC WILL MOVE INTO
EASTERN SUFFOLK COUNTY BETWEEN EAST MORICHES AND HAMPTON BAYS AROUND
6 PM AND ALSO TRACK TO THE NORTH. THIS ADDITIONAL RAINFALL WILL
LIKELY CAUSE FLASH FLOODING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN UPTON
NY.
&&
LAT...LON 4071 7293 4072 7294 4073 7289 4076 7288
4076 7291 4074 7293 4074 7295 4097 7302
4097 7277 4099 7262 4104 7253 4096 7245
4099 7249 4092 7261 4092 7247 4095 7245
4087 7237
$$967
WGUS71 KOKX 282226
FFSOKX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
626 PM EDT WED SEP 28 2011
NYC103-282245-
/O.CON.KOKX.FF.W.0041.000000T0000Z-110928T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUFFOLK NY-
626 PM EDT WED SEP 28 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM EDT FOR
SUFFOLK COUNTY...
AT 620 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LARGE AREA OF HEAVY TROPICAL LIKE SHOWERS MOVING
NORTHWARDS ACROSS EASTERN SUFFOLK COUNTY FROM A LINE EAST OF SHIRLEY
AND SOUND BEACH TO SOUTHAMPTON AND PECONIC. RAINFALL RATES REMAIN
BETWEEN 1 AND 1 1/2 INCHES PER HOUR. THIS ADDITIONAL RAINFALL IS
LIKELY CAUSING FLASH FLOODING WITHIN THE WARNED AREA.
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.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN UPTON
NY.
&&
LAT...LON 4082 7253 4073 7286 4097 7291 4097 7277
4099 7262 4104 7253 4096 7245 4099 7249
4092 7261 4092 7247 4095 7245 4087 7237
$$540
WGUS51 KOKX 282237
FFWOKX
NYC103-290015-
/O.EXT.KOKX.FF.W.0041.000000T0000Z-110929T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
637 PM EDT WED SEP 28 2011
THE NATIONAL WEATHER SERVICE IN UPTON NY HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
SUFFOLK COUNTY IN SOUTHEAST NEW YORK...
* UNTIL 815 PM EDT...
* AT 631 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LARGE AREA OF HEAVY TROPICAL LIKE SHOWERS MOVING NORTHWARDS ACROSS
EASTERN SUFFOLK COUNTY FROM A LINE EAST OF SHIRLEY AND SOUND BEACH
TO SOUTHAMPTON AND PECONIC. RAINFALL RATES REMAIN BETWEEN 1 AND 1
1/2 INCHES PER HOUR. BETWEEN 3/4 AND 1 INCH OF RAIN HAS ALREADY
FALLEN ACCORDING TO MESONET SITES AND ANOTHER 1/2 INCH IS EXPECTED
THROUGH 8 PM. THIS ADDITIONAL RAINFALL WILL LIKELY CAUSE FLASH
FLOODING WITHIN THE WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN UPTON
NY.
&&
LAT...LON 4082 7253 4073 7286 4097 7291 4097 7277
4099 7262 4104 7253 4096 7245 4099 7249
4092 7261 4092 7247 4095 7245 4087 7237
$$710
WGUS71 KOKX 290016
FFSOKX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
816 PM EDT WED SEP 28 2011
NYC103-290025-
/O.EXP.KOKX.FF.W.0041.000000T0000Z-110929T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUFFOLK NY-
816 PM EDT WED SEP 28 2011
...THE FLASH FLOOD WARNING HAS EXPIRED FOR SUFFOLK COUNTY...
THE HEAVY RAIN HAS MOVED EAST OF THE WARNED AREA...THEREFORE THE
WARNING HAS BEEN ALLOWED TO EXPIRE.
LAT...LON 4082 7253 4073 7286 4097 7291 4097 7277
4099 7262 4104 7253 4096 7245 4099 7249
4092 7261 4092 7247 4095 7245 4087 7237
$$The office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 28, 4:09 AM EDT | Small Craft Advisory for Hazardous Seas | OKX | 24 hr | |
| Sep 28, 5:51 AM EDT | Special Weather Statement | OKX | Orange | 2 hr |
| Sep 28, 5:54 AM EDT | Special Weather Statement | OKX | Orange | 2 hr |
| Sep 28, 8:24 AM EDT | Areal Flood Advisory | OKX | Orange | 71 min |
| Sep 28, 9:18 AM EDT | Flash Flood Warning | OKX | Orange | 117 min |
| Sep 28, 3:28 PM EDT | Coastal Flood Statement | OKX | Bronx, Kings, Nassau, New York, Queens, Richmond and 2 more | 11 hr |
| Sep 28, 3:28 PM EDT | Coastal Flood Advisory | OKX | Bronx, Kings, Nassau, New York, Queens, Richmond and 2 more | 24 hr |
Nearby
Flash Flood Warnings in New York, 2011Every flash flood warning 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.