Alert archive / Massachusetts / Flood Watches in 2023

Flood Watch 8, NWS Boston/Norton, MA

July 29, 202310 counties in Massachusetts; 4 counties in Rhode Island; Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this flood watch at Jul 29, 2023, 3:08 AM EDT for 10 counties in Massachusetts; 4 counties in Rhode Island; Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut. It took effect at Jul 29, 2023, 11:00 AM EDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Jul 29, 2023, 3:08 AM EDT (07:08 UTC)
In effect from: Jul 29, 2023, 11:00 AM EDT
Expired: Jul 29, 2023, 10:26 PM EDT
In force: 11 hr
Issued by: NWS Boston/Norton, MA
Flood severity: None

Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT, Bristol County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI

The radar

The Boston radar (KBOX), 44 km from the middle of the area, began a volume at 07:10 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 7.1 hours before the alert went out and 168 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: 785 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1111 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.4

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Boston/Norton, MA wrote its last area forecast discussion before this flood watch went out at Jul 29, 2:33 AM EDT, 35 minutes earlier.

Area forecast discussion, Jul 29, 2:33 AM EDT, 35 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, Jul 28, 4:08 PM EDT, 11 hours 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>

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 29, 3:21 AM EDT	Small Craft Advisory	BOX		33 hr
Jul 29, 5:03 AM EDT	Special Marine Warning	BOX		57 min
Jul 29, 5:14 AM EDT	Special Weather Statement	BOX	Bristol	61 min
Jul 29, 1:30 PM EDT	Special Weather Statement	BOX	Suffolk	60 min
Jul 29, 1:39 PM EDT	Flash Flood Warning	BOX	Middlesex, Norfolk, Suffolk	73 min
Jul 29, 1:51 PM EDT	Special Weather Statement	BOX	Suffolk	39 min
Jul 29, 1:55 PM EDT	Special Marine Warning	BOX		37 min
Jul 29, 2:25 PM EDT	Severe Thunderstorm Warning	BOX	Plymouth	24 min
Jul 29, 2:28 PM EDT	Special Marine Warning	BOX		47 min
Jul 29, 3:18 PM EDT	Special Weather Statement	BOX	Middlesex	42 min
Jul 29, 3:41 PM EDT	Flash Flood Warning	BOX	Essex	94 min
Jul 29, 4:05 PM EDT	Special Weather Statement	BOX	Hampshire	55 min
Jul 29, 4:12 PM EDT	Flash Flood Warning	BOX	Essex, Middlesex	2 hr
Jul 29, 4:47 PM EDT	Flash Flood Warning	BOX	Franklin	118 min
Jul 29, 4:50 PM EDT	Flash Flood Warning	BOX	Middlesex, Norfolk, Suffolk	4 hr
Jul 29, 5:11 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire	46 min
Jul 29, 5:38 PM EDT	Special Weather Statement	BOX	Worcester	67 min
Jul 29, 5:53 PM EDT	Special Marine Warning	BOX		67 min
Jul 29, 6:07 PM EDT	Special Weather Statement	BOX	Hampden, Worcester	53 min
Jul 29, 6:22 PM EDT	Special Weather Statement	BOX	Essex	38 min
Jul 29, 6:50 PM EDT	Flash Flood Warning	BOX	Essex, Middlesex, Worcester	115 min
Jul 29, 6:58 PM EDT	Special Weather Statement	BOX	Middlesex, Worcester	62 min
Jul 29, 7:41 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Worcester	34 min
Jul 29, 3:56 PM EDT	Special Weather Statement	BOX	Kent, Providence	64 min
Jul 29, 7:17 PM EDT	Severe Thunderstorm Warning	BOX	Providence	58 min
Jul 29, 7:59 PM EDT	Severe Thunderstorm Warning	BOX	Kent, Providence	32 min
Jul 29, 1:43 PM EDT	Special Weather Statement	BOX		62 min
Jul 29, 2:38 PM EDT	Special Weather Statement	BOX		67 min
Jul 29, 2:50 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	43 min
Jul 29, 6:35 PM EDT	Special Weather Statement	BOX		85 min
Jul 29, 7:09 PM EDT	Special Weather Statement	BOX		66 min
Jul 29, 7:21 PM EDT	Tornado Warning	BOX	Northeastern Connecticut Planning Region	24 min
Jul 29, 7:43 PM EDT	Tornado Warning	BOX	Northeastern Connecticut Planning Region	17 min

Nearby

Flood Watches in Massachusetts, 2023 Flood Watches in Rhode Island, 2023 Flood Watches in Connecticut, 2023 Every flood watch in 2023

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.