Alert archive / Connecticut / Flash Flood Warnings in 2022

Flash Flood Warning 2, NWS Boston/Norton, MA

August 23, 2022Capitol Planning Region, Connecticut

NWS Boston/Norton, MA issued this flash flood warning at Aug 23, 2022, 4:16 PM EDT for Capitol Planning Region, Connecticut. It was in force for 2 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: Aug 23, 2022, 4:16 PM EDT (20:16 UTC)
Expired: Aug 23, 2022, 6:44 PM EDT
In force: 2 hr
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Flood severity: None

County Capitol Planning Region, CT

The radar

The Boston radar (KBOX), 116 km from the middle of the area, began a volume at 20:17 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 12:00Z, 8.3 hours before the alert went out and 116 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: 651 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 908 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

180 
WGUS51 KBOX 232016
FFWBOX
CTC003-013-232330-
/O.NEW.KBOX.FF.W.0002.220823T2016Z-220823T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Boston/Norton MA
416 PM EDT Tue Aug 23 2022

The National Weather Service in Norton has issued a

* Flash Flood Warning for...
  East Central Hartford County in northern Connecticut...
  Northwestern Tolland County in northern Connecticut...

* Until 730 PM EDT.

* At 416 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. The expected rainfall rate is 2 
  to 3 inches in 1 hour. Flash flooding is ongoing or expected to 
  begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  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...
  Manchester, East Hartford, Enfield, Vernon, Windsor, South 
  Windsor, Ellington, Tolland, Somers and East Windsor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In hilly terrain there are hundreds of low water crossings which are 
potentially dangerous in heavy rain. Do not attempt to cross flooded 
roads. Find an alternate route.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 4197 7245 4190 7241 4180 7255 4179 7263
      4183 7264 4192 7259

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...2-3 INCHES IN 1 HOUR

$$

Belk

1 follow-up statement

293 
WGUS71 KBOX 232244
FFSBOX

Flash Flood Statement
National Weather Service Boston/Norton MA
644 PM EDT Tue Aug 23 2022

CTC003-013-232254-
/O.CAN.KBOX.FF.W.0002.000000T0000Z-220823T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hartford CT-Tolland CT-
644 PM EDT Tue Aug 23 2022

...FLASH FLOOD WARNING IS CANCELLED FOR EAST CENTRAL HARTFORD AND 
NORTHWESTERN TOLLAND COUNTIES...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

LAT...LON 4197 7245 4190 7241 4180 7255 4179 7263
      4183 7264 4192 7259

$$

Belk

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 1:48 PM EDT	Special Weather Statement	BOX		57 min
Aug 23, 2:18 PM EDT	Special Weather Statement	BOX		57 min
Aug 23, 2:52 PM EDT	Special Weather Statement	BOX		53 min
Aug 23, 3:44 PM EDT	Special Weather Statement	BOX		61 min
Aug 23, 3:51 PM EDT	Special Weather Statement	BOX		54 min
Aug 23, 4:28 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	62 min
Aug 23, 4:43 PM EDT	Special Weather Statement	BOX		62 min

Nearby

Flash Flood Warnings in Connecticut, 2022 Every flash flood warning in 2022

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.