Alert archive / New York / Flash Flood Warnings in 2018

Flash Flood Warning 13, NWS New York, NY

July 28, 2018Putnam County, New York

NWS New York, NY issued this flash flood warning at Jul 28, 2018, 5:11 PM EDT for Putnam County, New York. It was in force for 64 min. 2 reports 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 28, 2018, 5:11 PM EDT (21:11 UTC)
Expired: Jul 28, 2018, 6:15 PM EDT
In force: 64 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Flood severity: None

County Putnam County, NY

The radar

The Brookhaven radar (KOKX), 94 km from the middle of the area, began a volume at 21:10 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 28, 5:30 PM EDT	FLASH FLOOD	Lake Carmel, NY	LUDINGTONVILLE ROAD CLOSE ALONG I-84 DUE TO FLOODING.
Jul 28, 5:45 PM EDT	FLASH FLOOD	Patterson, NY	ROUTE 311 CLOSED 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

Brookhaven, NY (KOKX), launched 12:00Z, 9.2 hours before the alert went out and 94 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: 140 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 1009 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

659 
WGUS51 KOKX 282111
FFWOKX
NYC079-282215-
/O.NEW.KOKX.FF.W.0013.180728T2111Z-180728T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
511 PM EDT SAT JUL 28 2018

The National Weather Service in Upton NY has issued a

* Flash Flood Warning for...
  Eastern Putnam County in southeastern New York...

* Until 615 PM EDT.

* At 510 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to 
  begin shortly. 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.

* Some locations that will experience flooding include...
  Lake Carmel, New Fairfield, Patterson and Putnam Lake. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 4152 7353 4146 7353 4143 7374 4150 7384
      4153 7355

$$

FIG

2 follow-up statements

776 
WGUS71 KOKX 282147
FFSOKX

Flash Flood Statement
National Weather Service New York NY
547 PM EDT SAT JUL 28 2018

NYC079-282215-
/O.CON.KOKX.FF.W.0013.000000T0000Z-180728T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Putnam NY-
547 PM EDT SAT JUL 28 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM EDT FOR
EASTERN PUTNAM COUNTY...

At 545 PM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area.  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.

Some locations that will experience flooding include...
Lake Carmel, New Fairfield, Patterson and Putnam Lake. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 4152 7353 4146 7353 4143 7374 4150 7384
      4153 7355

$$

FIG

895 
WGUS71 KOKX 282214
FFSOKX

Flash Flood Statement
National Weather Service New York NY
614 PM EDT SAT JUL 28 2018

NYC079-282223-
/O.EXP.KOKX.FF.W.0013.000000T0000Z-180728T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Putnam NY-
614 PM EDT SAT JUL 28 2018

...THE FLASH FLOOD WARNING FOR EASTERN PUTNAM COUNTY WILL EXPIRE AT
615 PM EDT...

Flooding is no longer expected to pose a threat. Please continue to
heed any remaining road closures.

LAT...LON 4152 7353 4146 7353 4143 7374 4150 7384
      4153 7355

$$

FIG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 8:07 PM EDT	Special Marine Warning	OKX		53 min
Jul 27, 8:14 PM EDT	Special Marine Warning	OKX		46 min
Jul 27, 8:21 PM EDT	Special Weather Statement	OKX	Nassau	54 min
Jul 27, 8:24 PM EDT	Special Marine Warning	OKX		66 min
Jul 28, 12:44 PM EDT	Special Weather Statement	OKX	Orange	46 min
Jul 28, 4:45 PM EDT	Special Weather Statement	OKX	Putnam	45 min

Nearby

Flash Flood Warnings in New York, 2018 Every flash flood warning in 2018

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.