Alert archive / Pennsylvania / Areal Flood Advisories in 2019

Areal Flood Advisory 20, NWS Philadelphia/Mount Holly

April 14, 2019Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood advisory at Apr 14, 2019, 9:19 PM EDT for Berks County, Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 14, 2019, 9:19 PM EDT (01:19 UTC)
Expired
Apr 15, 2019, 12:15 AM EDT
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 01:18 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.3 hours before the alert went out and 206 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, Washington/Dulle, VA at 00:00Z on 2019-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 243 joules per kilogram.LCLLFCEL10008507005003002001001 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, Washington/Dulle, VA at 00:00Z on 2019-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 326 square meters per square second.1939587897Sfc1 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
243 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
961 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
326 m²/s²
0-3 km storm-relative helicity
478 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.3

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at Apr 14, 5:32 PM EDT, 3 hours 47 minutes earlier.

Area forecast discussion, Apr 14, 5:32 PM EDT, 3 hours 47 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, Apr 14, 5:22 PM EDT, 3 hours 57 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
522 PM EDT Sun Apr 14 2019

NJZ001-007-PAZ054-055-060>062-152130-
Sussex-Warren-Carbon-Monroe-Berks-Lehigh-Northampton-
522 PM EDT Sun Apr 14 2019

...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...

This Hazardous Weather Outlook is for northern New Jersey, east
central Pennsylvania and northeast Pennsylvania.

.DAY ONE...Tonight.

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

   Flash Flood Watch.

Showers and thunderstorms will move across the area later tonight
into early Monday morning. The main threat will be damaging winds.
An isolated tornado cannot be ruled out.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ001>004-MDZ008-012-015-019-020-NJZ008>010-012>027-PAZ070-071-
101>106-152130-
New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD-
Queen Annes-Talbot-Caroline-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-Camden-
Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean-
Southeastern Burlington-Delaware-Philadelphia-Western Chester-
Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks-
Lower Bucks-
522 PM EDT Sun Apr 14 2019

This Hazardous Weather Outlook is for central Delaware, northern
Delaware, southern Delaware, northeast Maryland, central New
Jersey, northern New Jersey, northwest New Jersey, southern New
Jersey and southeast Pennsylvania.

.DAY ONE...Tonight.

Showers and thunderstorms will move across the area later tonight
into early Monday morning. The main threat will be damaging winds
and heavy rainfall which could lead to areas of urban and poor
drainage flooding. An isolated tornado cannot be ruled out.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a low probability for widespread hazardous weather.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ430-431-450>455-152130-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
522 PM EDT Sun Apr 14 2019

...GALE WARNING IN EFFECT FROM 6 AM MONDAY TO 6 AM EDT TUESDAY...

This Hazardous Weather Outlook is for Atlantic coastal waters and
Delaware Bay Waters.

.DAY ONE...Tonight.

Thunderstorms late tonight into early Monday morning may produce wind
gusts above 34 kt.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

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

   Gale Warning.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

In the hours before

Special weather statement, Apr 14, 7:32 PM EDT, 1 hour 47 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
732 PM EDT Sun Apr 14 2019

PAZ060-150245-
Berks-
Including the city of Reading
732 PM EDT Sun Apr 14 2019

...STRONG THUNDERSTORMS MAY AFFECT BERKS COUNTY BETWEEN 8 AND 10
PM EDT...

At 730 PM EDT...National Weather Service Doppler radar indicated a
cluster of thunderstorms over northeastern York County and
western Lancaster County moving northeast at around 35 MPH. Some
of these thunderstorms could be strong as they move into Berks
County later this evening, with wind gusts up to 50 MPH possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These storms could intensify under the right conditions, so be
certain to monitor local radio stations and available television
stations for additional information and possible warnings from the
National Weather Service.

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 15, 12:31 AM EDTMarine Dense Fog AdvisoryPHI5 hr
Apr 15, 2:34 AM EDTSpecial Weather StatementPHIWarren41 min
Apr 15, 2:46 AM EDTSevere Thunderstorm WarningPHIGloucester, Salem44 min
Apr 15, 2:47 AM EDTSpecial Marine WarningPHI58 min
Apr 15, 3:00 AM EDTAreal Flood AdvisoryPHISussex, Warren4 hr
Apr 15, 3:03 AM EDTSevere Thunderstorm WarningPHIHunterdon, Warren20 min
Apr 15, 3:07 AM EDTSevere Thunderstorm WarningPHICamden, Cumberland, Gloucester, Salem38 min
Apr 15, 3:08 AM EDTSpecial Marine WarningPHI67 min
Apr 15, 3:11 AM EDTSpecial Weather StatementPHIHunterdon, Morris, Sussex, Warren49 min
Apr 15, 3:19 AM EDTTornado WarningPHIBurlington, Camden, Gloucester, Salem26 min
Apr 15, 3:19 AM EDTWind AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more18 hr
Apr 15, 3:27 AM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Morris, Somerset32 min
Apr 15, 3:39 AM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 2 more37 min
Apr 15, 3:41 AM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more64 min
Apr 15, 3:42 AM EDTSpecial Marine WarningPHI63 min
Apr 15, 3:57 AM EDTSevere Thunderstorm WarningPHIMiddlesex, Morris, Somerset13 min
Apr 15, 3:59 AM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 7 more4 hr
Apr 15, 4:16 AM EDTSpecial Marine WarningPHI59 min
Apr 15, 4:40 AM EDTSpecial Marine WarningPHI65 min
Apr 15, 4:47 AM EDTSpecial Weather StatementPHIAtlantic28 min
Apr 15, 5:07 AM EDTSpecial Marine WarningPHI53 min
Apr 15, 5:30 AM EDTCoastal Flood StatementPHIOcean7 hr
Apr 15, 6:59 AM EDTAreal Flood WarningPHIHunterdon4 hr
Apr 15, 12:03 AM EDTSpecial Weather StatementPHIMonroe27 min
Apr 15, 1:10 AM EDTSpecial Weather StatementPHISchuylkill50 min
Apr 15, 1:26 AM EDTAreal Flood AdvisoryPHICarbon, Monroe4 hr
Apr 15, 1:28 AM EDTSevere Thunderstorm WarningPHICarbon, Monroe47 min
Apr 15, 1:43 AM EDTAreal Flood AdvisoryPHIBerks4 hr
Apr 15, 1:58 AM EDTSpecial Weather StatementPHIBerks, Carbon, Monroe47 min
Apr 15, 2:21 AM EDTAreal Flood AdvisoryPHILehigh, Northampton4 hr
Apr 15, 2:28 AM EDTSpecial Weather StatementPHIChester32 min
Apr 15, 3:21 AM EDTTornado WarningPHIKent24 min
Apr 15, 3:28 AM EDTSevere Thunderstorm WarningPHISussex47 min
Apr 15, 3:31 AM EDTTornado WarningPHISussex29 min
Apr 15, 3:36 AM EDTTornado WarningPHIKent, Sussex24 min
Apr 15, 4:19 AM EDTSpecial Weather StatementPHISussex26 min

Nearby

Areal Flood Advisories in Pennsylvania, 2019Every areal flood advisory in 2019

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.