Alert archive / New York / Flash Flood Warnings in 2020

Flash Flood Warning 13, NWS Binghamton, NY

August 11, 2020Broome County, Chenango County, Delaware County, New York

NWS Binghamton, NY issued this flash flood warning at Aug 11, 2020, 9:47 PM EDT for Broome County, Chenango County, Delaware County, New York. It was in force for 2 hr. 4 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: Aug 11, 2020, 9:47 PM EDT (01:47 UTC)
Expired: Aug 11, 2020, 11:55 PM EDT
In force: 2 hr
Issued by: NWS Binghamton, NY
Area: Storm-based polygon
Flood severity: None

Counties Broome County, NY, Chenango County, NY, Delaware County, NY

The radar

The Binghamton radar (KBGM), 49 km from the middle of the area, began a volume at 01:48 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.

What was reported inside it

Time	Report	Where	Remark
Aug 11, 9:55 PM EDT	FLOOD	1 S Port Crane, NY	CREEK FLOWING OVER ROADWAY ON NOWLAND ROAD
Aug 11, 10:05 PM EDT	HEAVY RAIN 2.17	2 Sw Cleaver, NY	RAIN FELL IN THE LAST 60 MINUTES
Aug 11, 10:10 PM EDT	HEAVY RAIN 1.52	Nineveh, NY	TOTAL RAIN FROM LINE OF STORMS
Aug 11, 11:18 PM EDT	FLOOD	Harpursville, NY	WATER ON ROUTE 79

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

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 1.8 hours before the alert went out and 141 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: 217 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1733 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

027 
WGUS51 KBGM 120147
FFWBGM
NYC007-017-025-120445-
/O.NEW.KBGM.FF.W.0013.200812T0147Z-200812T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Binghamton NY
947 PM EDT Tue Aug 11 2020

The National Weather Service in Binghamton has issued a

* Flash Flood Warning for...
  Southeastern Broome County in central New York...
  West central Delaware County in central New York...
  South central Chenango County in central New York...

* Until 1245 AM EDT.

* At 946 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is ongoing or expected to begin
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  Binghamton, Walton, Delhi, Sanford, Colchester, Deposit, Hamden,
  Masonville, Windsor and Afton.

Additional rainfall amounts of up to two inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now. Act quickly to protect your life.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 4234 7490 4216 7487 4205 7528 4200 7556
      4205 7577 4212 7589 4225 7583 4225 7556

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

MJM

1 follow-up statement

536 
WGUS71 KBGM 120355
FFSBGM

Flash Flood Statement
National Weather Service Binghamton NY
1155 PM EDT Tue Aug 11 2020

NYC007-017-025-120404-
/O.CAN.KBGM.FF.W.0013.000000T0000Z-200812T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Broome NY-Delaware NY-Chenango NY-
1155 PM EDT Tue Aug 11 2020

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN BROOME...WEST CENTRAL
DELAWARE AND SOUTH CENTRAL CHENANGO COUNTIES IS CANCELLED...

The heavy rain has ended. Flood waters are receding. Flooding is no 
longer expected to pose a significant threat. Please continue to 
heed any remaining road closures.

LAT...LON 4234 7490 4216 7487 4205 7528 4200 7556
      4205 7577 4212 7589 4225 7583 4225 7556

$$

MJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 8:28 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Delaware, Otsego	62 min
Aug 11, 9:02 PM EDT	Areal Flood Advisory	BGM	Broome, Chenango, Delaware, Otsego, Tioga	3 hr
Aug 11, 9:29 PM EDT	Special Weather Statement	BGM	Broome, Delaware	61 min
Aug 11, 10:28 PM EDT	Areal Flood Advisory	BGM	Delaware, Sullivan	3 hr

Nearby

Flash Flood Warnings in New York, 2020 Every flash flood warning in 2020

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.