Alert archive / Pennsylvania / Flash Flood Warnings in 2020

Flash Flood Warning 15, NWS Binghamton, NY

December 24, 2020Bradford County, Pennsylvania

NWS Binghamton, NY issued this flash flood warning at Dec 24, 2020, 5:54 PM EST for Bradford County, Pennsylvania. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Dec 24, 2020, 5:54 PM EST (22:54 UTC)
Expired
Dec 25, 2020, 1:30 AM EST
In force
8 hr
Issued by
NWS Binghamton, NY
Area
Storm-based polygon
Flood severity
None

County Bradford County, PA

The radar

The Binghamton radar (KBGM), 63 km from the middle of the area, began a volume at 22:58 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, 10.9 hours before the alert went out and 220 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2020-12-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2020-12-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 351 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1499 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
351 m²/s²
0-3 km storm-relative helicity
385 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Binghamton, NY wrote its last area forecast discussion before this flash flood warning went out at Dec 24, 4:10 PM EST, 1 hour 44 minutes earlier.

Area forecast discussion, Dec 24, 4:10 PM EST, 1 hour 44 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Dec 24, 3:39 PM EST, 2 hours 15 minutes before
Hazardous Weather Outlook
National Weather Service Binghamton NY
339 PM EST Thu Dec 24 2020

NYZ016>018-252045-
Seneca-Southern Cayuga-Onondaga-
339 PM EST Thu Dec 24 2020

This Hazardous Weather Outlook is for central New York.

.DAY ONE...This afternoon and tonight.

A strong storm system will bring warm temperatures and a soaking
rain this evening into early tomorrow morning. Combined snowmelt and
rain may lead to ponding of water on roads in poor drainage areas.
Much colder air will overspread the area late tomorrow morning
through Friday, causing wet surfaces to freeze. This may lead to icy
roads on Christmas day.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures. Please relay
any information about severe weather to the NWS while following
local, state and CDC guidelines.

NYZ009-023>025-036-037-044>046-055-056-PAZ038-039-043-252045-
Northern Oneida-Schuyler-Chemung-Tompkins-Madison-Southern Oneida-
Cortland-Chenango-Otsego-Tioga-Broome-Bradford-Susquehanna-Wyoming-
339 PM EST Thu Dec 24 2020

...FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

This Hazardous Weather Outlook is for central New York and
northeast Pennsylvania.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures. Please relay
any information about severe weather to the NWS while following
local, state and CDC guidelines.

NYZ022-252045-
Steuben-
339 PM EST Thu Dec 24 2020

...FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...
...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM
EST FRIDAY...

This Hazardous Weather Outlook is for central New York.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.
   Winter Weather Advisory.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.
   Winter Weather Advisory.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures. Please relay
any information about severe weather to the NWS while following
local, state and CDC guidelines.

NYZ015-252045-
Yates-
339 PM EST Thu Dec 24 2020

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM
EST FRIDAY...

This Hazardous Weather Outlook is for central New York.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Weather Advisory.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Weather Advisory.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures. Please relay
any information about severe weather to the NWS while following
local, state and CDC guidelines.

NYZ057-062-PAZ040-044-047-048-072-252045-
Delaware-Sullivan-Northern Wayne-Lackawanna-Luzerne-Pike-
Southern Wayne-
339 PM EST Thu Dec 24 2020

...FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...
...WIND ADVISORY IN EFFECT UNTIL 7 AM EST FRIDAY...

This Hazardous Weather Outlook is for central New York and
northeast Pennsylvania.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.
   Wind Advisory.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.
   Wind Advisory.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures. Please relay
any information about severe weather to the NWS while following
local, state and CDC guidelines.

In the hours before

Local storm report, Dec 24, 2:39 PM EST, 3 hours 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
239 PM EST THU DEC 24 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0230 PM     HEAVY RAIN       4 NW TUNKHANNOCK        41.58N 76.00W
12/24/2020  M0.86 INCH       WYOMING            PA   COCORAHS

            TEMPERATURE 48.

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 24, 3:57 AM ESTWind AdvisoryBGMDelaware, Sullivan27 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMDelaware, Sullivan37 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMBroome3 days
Dec 24, 11:30 AM ESTRiver Flood WarningBGMChenango53 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMTioga21 days
Dec 24, 11:30 AM ESTRiver Flood WarningBGMBroome53 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMCortland39 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMTioga52 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMChenango, Delaware62 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMDelaware, Otsego57 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMChenango, Otsego50 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMBroome40 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMChenango58 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMDelaware55 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMBroome21 days
Dec 24, 11:30 AM ESTRiver Flood WarningBGMBroome, Tioga21 days
Dec 24, 11:30 AM ESTRiver Flood WarningBGMCortland21 days
Dec 24, 3:15 PM ESTWinter Weather AdvisoryBGMSteuben, Yates19 hr
Dec 24, 4:00 PM ESTRiver Flood WarningBGMChemung41 hr
Dec 24, 6:46 PM ESTFlash Flood WarningBGMChemung, Schuyler, Steuben8 hr
Dec 24, 6:55 PM ESTFlash Flood WarningBGMBroome8 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMBradford42 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMBradford59 hr
Dec 24, 11:30 AM ESTRiver Flood WarningBGMWyoming21 days
Dec 24, 11:30 AM ESTRiver Flood WarningBGMLuzerne21 days

Nearby

Flash Flood Warnings in Pennsylvania, 2020Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.