Alert archive / Maine / Flash Flood Warnings in 2021

Flash Flood Warning 18, NWS Gray, ME

September 24, 2021Cumberland County, Oxford County, Maine

NWS Gray, ME issued this flash flood warning at Sep 24, 2021, 7:02 PM EDT for Cumberland County, Oxford County, Maine. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 24, 2021, 7:02 PM EDT (23:02 UTC)
Expired: Sep 24, 2021, 10:00 PM EDT
In force: 3 hr
Issued by: NWS Gray, ME
Area: Storm-based polygon
Flood severity: None

Counties Cumberland County, ME, Oxford County, ME

The radar

The Portland,ME radar (KGYX), 51 km from the middle of the area, began a volume at 23:02 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

Gray, ME (KGYX), launched 12:00Z, 11.0 hours before the alert went out and 51 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: 249 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 537 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

559 
WGUS51 KGYX 242302
FFWGYX
MEC005-017-250200-
/O.NEW.KGYX.FF.W.0018.210924T2302Z-210925T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Gray ME
702 PM EDT Fri Sep 24 2021

The National Weather Service in Gray has issued a

* Flash Flood Warning for...
  Northwestern Cumberland County in southwestern Maine...
  Southeastern Oxford County in western Maine...

* Until 1000 PM EDT.

* At 702 PM EDT, Doppler radar indicated heavy rain across the 
  warned area. Between 1 and 2 inches of rain have fallen. 
  Additional rainfall amounts of 1 to 2 inches are possible in the 
  warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by heavy rain.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Bridgton, Rumford, Waterford, Harrison, Greenwood, Norway, West 
  Paris, Woodstock, Paris, and Albany.

This includes the following Rec locations...
	Mount Zircon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 4409 7083 4453 7053 4449 7041 4404 7069

FLASH FLOOD...RADAR INDICATED

$$

JC

1 follow-up statement

176 
WGUS71 KGYX 250014
FFSGYX

Flash Flood Statement
National Weather Service Gray ME
814 PM EDT Fri Sep 24 2021

MEC005-017-250200-
/O.CON.KGYX.FF.W.0018.000000T0000Z-210925T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cumberland ME-Oxford ME-
814 PM EDT Fri Sep 24 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS 
EVENING FOR NORTHWESTERN CUMBERLANDSOUTHEASTERN OXFORD COUNTIES...

At 814 PM EDT, Doppler radar indicated heavy rain across the warned 
area. Between 2 and 3 inches of rain have fallen. Additional 
rainfall amounts up to 0.5 inches are possible in the warned area. 
Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by heavy rain.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Bridgton, Rumford, Waterford, Harrison, Greenwood, Norway, West 
  Paris, Woodstock, Paris, and Albany.

This includes the following Rec locations...
	Mount Zircon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Flooding is occurring or is imminent. It is important to know where 
you are relative to streams, rivers, or creeks which can become 
killers in heavy rains. Campers and hikers should avoid streams or 
creeks.

&&

LAT...LON 4409 7083 4453 7053 4449 7041 4404 7069

FLASH FLOOD...RADAR INDICATED

$$

JC

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 24, 6:37 PM EDT	Areal Flood Advisory	GYX	Cumberland, Oxford	3 hr

Nearby

Flash Flood Warnings in Maine, 2021 Every flash flood warning in 2021

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.