Alert archive / Maine / Flash Flood Warnings in 2023

Flash Flood Warning 20, NWS Gray, ME

June 29, 2023Somerset County, Maine

NWS Gray, ME issued this flash flood warning at Jun 29, 2023, 3:43 PM EDT for Somerset County, Maine. It was in force for 5 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
Jun 29, 2023, 3:43 PM EDT (19:43 UTC)
Expired
Jun 29, 2023, 8:45 PM EDT
In force
5 hr
Issued by
NWS Gray, ME
Area
Storm-based polygon
Flood severity
None

County Somerset County, ME

The radar

The Caribou radar (KCBW), 177 km from the middle of the area, began a volume at 19:45 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

Caribou, ME (KCAR), launched 12:00Z, 7.7 hours before the alert went out and 213 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, Caribou, ME at 12:00Z on 2023-06-29Temperature 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, Caribou, ME at 12:00Z on 2023-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
572 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 Gray, ME wrote its last area forecast discussion before this flash flood warning went out at Jun 29, 10:38 AM EDT, 5 hours 5 minutes earlier.

Area forecast discussion, Jun 29, 10:38 AM EDT, 5 hours 5 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, Jun 29, 3:38 PM EDT, 5 minutes before
Hazardous Weather Outlook
National Weather Service Gray ME
338 PM EDT Thu Jun 29 2023

MEZ007>009-012>014-018>020-033-NHZ001>004-006-301945-
Northern Oxford-Northern Franklin-Central Somerset-Southern Oxford-
Southern Franklin-Southern Somerset-Interior York-
Central Interior Cumberland-Androscoggin-
Interior Cumberland Highlands-Northern Coos-Southern Coos-
Northern Grafton-Northern Carroll-Southern Carroll-
338 PM EDT Thu Jun 29 2023

This Hazardous Weather Outlook is for Maine, south central Maine,
southwest Maine, west central Maine, western Maine and northern New
Hampshire.

.DAY ONE...This afternoon and tonight.

Scattered showers and thunderstorms will be capable of producing
locally heavy rainfall through this evening, which may result in
isolated instances of flooding.

.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.

MEZ021>028-NHZ005-007>015-301945-
Kennebec-Interior Waldo-Coastal York-Coastal Cumberland-Sagadahoc-
Lincoln-Knox-Coastal Waldo-Southern Grafton-Sullivan-Merrimack-
Belknap-Strafford-Cheshire-Eastern Hillsborough-Interior Rockingham-
Coastal Rockingham-Western And Central Hillsborough-
338 PM EDT Thu Jun 29 2023

This Hazardous Weather Outlook is for south central Maine,
southwest Maine, New Hampshire, central New Hampshire, northern New
Hampshire and southern New Hampshire.

.DAY ONE...This afternoon and tonight.

No hazardous weather is expected at this time.

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

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ150>154-301945-
Coastal Waters from Stonington, ME to Port Clyde, ME out 25 NM-
Penobscot Bay-
Coastal Waters from Port Clyde, ME to Cape Elizabeth, ME out 25 NM-
Casco Bay-
Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out
25 NM-
338 PM EDT Thu Jun 29 2023

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...This afternoon and tonight.

No hazardous weather is expected at this time.

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

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Jun 29, 11:57 AM EDT, 3 hours 46 minutes before
Preliminary Local Storm Report
National Weather Service Gray ME
1157 AM EDT Thu Jun 29 2023

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

0308 PM     Flash Flood      5 SE Moultonborough     43.70N 71.33W
06/28/2023                   Carroll            NH   Dept of Highways

            Delayed Report: Significant amounts of water
            on NH-109, eroded ditches along the side of
            the road, undermining the edge of the
            roadway. Adjacent creek swelled up to 1
            foot.

&&

Palmer
Local storm report, Jun 29, 11:58 AM EDT, 3 hours 45 minutes before
Preliminary Local Storm Report
National Weather Service Gray ME
1158 AM EDT Thu Jun 29 2023

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

0236 PM     Flash Flood      3 ESE Moultonborough    43.73N 71.34W
06/28/2023                   Carroll            NH   Dept of Highways

            Delayed Report: A clogged culvert flooded NH
            171, offsetting a significant amount of
            water onto NH 171. Receded by 6:30pm. Time
            estimated by source.

&&

Palmer
Local storm report, Jun 29, 12:52 PM EDT, 2 hours 51 minutes before
Preliminary Local Storm Report
National Weather Service Gray ME
1252 PM EDT Thu Jun 29 2023

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

0500 PM     Flash Flood      2 ENE Lebanon           43.66N 72.22W
06/28/2023                   Grafton            NH   Law Enforcement

            Significant washout on Stevens Rd, culverts
            overflowed and exposed, approximately 2000
            ft of pavement washout.

&&

SMT
Special weather statement, Jun 29, 3:16 PM EDT, 27 minutes before
Special Weather Statement
National Weather Service Gray ME
316 PM EDT Thu Jun 29 2023

MEZ009-292000-
Central Somerset ME-
316 PM EDT Thu Jun 29 2023

...A strong thunderstorm will impact portions of central Somerset
County through 400 PM EDT...

At 315 PM EDT, Doppler radar was tracking a strong thunderstorm 11
miles northeast of Kingfield, or 23 miles east of Eustis, moving
northeast at 5 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Bingham, Caratunk Plantation, Pleasant Ridge Plantation, Moscow,
Concord, Highland Plantation, Mayfield, Lexington and Carrying Place.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.

&&

LAT...LON 4501 6998 4505 7006 4513 7008 4523 6989
      4515 6979 4509 6976
TIME...MOT...LOC 1915Z 227DEG 5KT 4510 7003

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

GC

The office that day

Everything else NWS Gray, ME issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 28, 9:06 PM EDTDense Fog AdvisoryGYXAndroscoggin, Cumberland, Kennebec, Knox, Lincoln, Sagadahoc and 2 more12 hr
Jun 29, 2:02 PM EDTAreal Flood AdvisoryGYXSomerset3 hr
Jun 29, 3:16 PM EDTSpecial Weather StatementGYXFranklin44 min
Jun 29, 4:19 PM EDTAreal Flood AdvisoryGYXFranklin, Somerset3 hr
Jun 29, 4:28 PM EDTAreal Flood AdvisoryGYXOxford117 min
Jun 29, 4:44 PM EDTAreal Flood AdvisoryGYXFranklin, Kennebec, Oxford33 min
Jun 29, 5:17 PM EDTFlash Flood WarningGYXFranklin, Oxford4 hr
Jun 29, 5:26 PM EDTAreal Flood AdvisoryGYXSomerset52 min
Jun 29, 6:18 PM EDTFlash Flood WarningGYXSomerset2 hr
Jun 29, 6:42 PM EDTDense Fog AdvisoryGYXAndroscoggin, Cumberland, Kennebec, Knox, Lincoln, Sagadahoc and 2 more15 hr
Jun 29, 6:51 PM EDTAreal Flood AdvisoryGYXAndroscoggin, Oxford2 hr

Nearby

Flash Flood Warnings in Maine, 2023Every flash flood warning 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.