Alert archive / Vermont / Flash Flood Warnings in 2023
Flash Flood Warning 45, NWS Burlington, VT
NWS Burlington, VT issued this flash flood warning at Jul 21, 2023, 4:56 AM EDT for Addison County, Chittenden County, Vermont; Essex County, New York. 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 counties it named.
The facts
- Issued
- Jul 21, 2023, 4:56 AM EDT (08:56 UTC)
- Expired
- Jul 21, 2023, 6:59 AM EDT
- In force
- 2 hr
- Issued by
- NWS Burlington, VT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Essex County, NY, Addison County, VT, Chittenden County, VT
The radar
The Burlington radar (KCXX), 37 km from the middle of the area, began a volume at 08:57 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, 8.9 hours before the alert went out and 373 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.
- Mixed-layer CAPE
- 177 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 1161 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
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 Burlington, VT wrote its last area forecast discussion before this flash flood warning went out at Jul 21, 2:23 AM EDT, 2 hours 33 minutes earlier.
Area forecast discussion, Jul 21, 2:23 AM EDT, 2 hours 33 minutes before
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</html>Hazardous weather outlook, Jul 21, 3:35 AM EDT, 1 hour 21 minutes before
Hazardous Weather Outlook National Weather Service Burlington VT 335 AM EDT Fri Jul 21 2023 NYZ026>031-034-035-087-VTZ001>011-016>021-220745- Northern St. Lawrence-Northern Franklin-Eastern Clinton- Southeastern St. Lawrence-Southern Franklin-Western Clinton- Western Essex-Eastern Essex-Southwestern St. Lawrence-Grand Isle- Western Franklin-Orleans-Essex-Western Chittenden-Lamoille-Caledonia- Washington-Western Addison-Orange-Western Rutland-Eastern Franklin- Eastern Chittenden-Eastern Addison-Eastern Rutland-Western Windsor- Eastern Windsor- 335 AM EDT Fri Jul 21 2023 ...FLOOD WATCH IN EFFECT FROM NOON EDT TODAY THROUGH LATE TONIGHT... This Hazardous Weather Outlook is for northern New York, central Vermont, northeast Vermont, northwest Vermont and southern Vermont. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flood Watch. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The office that day
Everything else NWS Burlington, VT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 6:59 AM EDT | Areal Flood Warning | BTV | Addison, Chittenden | 61 min |
| Jul 21, 2:14 PM EDT | Special Weather Statement | BTV | Addison | 61 min |
| Jul 21, 2:52 PM EDT | Flash Flood Warning | BTV | Addison | 3 hr |
| Jul 21, 3:26 PM EDT | Severe Thunderstorm Warning | BTV | Franklin, Grand Isle | 64 min |
| Jul 21, 3:33 PM EDT | Special Weather Statement | BTV | Washington | 57 min |
| Jul 21, 3:44 PM EDT | Severe Thunderstorm Warning | BTV | Addison, Orange, Washington | 38 min |
| Jul 21, 4:29 PM EDT | Severe Thunderstorm Warning | BTV | Franklin, Grand Isle | 61 min |
| Jul 21, 4:33 PM EDT | Severe Thunderstorm Warning | BTV | Addison, Orange, Rutland, Washington, Windsor | 57 min |
| Jul 21, 4:50 PM EDT | Special Weather Statement | BTV | Franklin, Grand Isle | 25 min |
| Jul 21, 5:04 PM EDT | Severe Thunderstorm Warning | BTV | Chittenden, Franklin, Grand Isle, Lamoille | 56 min |
| Jul 21, 5:09 PM EDT | Areal Flood Warning | BTV | Rutland, Windsor | 3 hr |
| Jul 21, 5:39 PM EDT | Severe Thunderstorm Warning | BTV | Chittenden | 66 min |
| Jul 21, 5:49 PM EDT | Areal Flood Warning | BTV | Franklin | 13 min |
| Jul 21, 5:53 PM EDT | Special Weather Statement | BTV | Addison | 67 min |
| Jul 21, 6:02 PM EDT | Flash Flood Warning | BTV | Franklin | 3 hr |
| Jul 21, 6:14 PM EDT | Special Weather Statement | BTV | Rutland | 61 min |
| Jul 21, 6:39 PM EDT | Special Weather Statement | BTV | Chittenden | 66 min |
| Jul 21, 7:55 PM EDT | Special Weather Statement | BTV | Essex, Orleans | 65 min |
| Jul 21, 11:53 AM EDT | Special Weather Statement | BTV | St. Lawrence | 67 min |
| Jul 21, 1:04 PM EDT | Special Weather Statement | BTV | St. Lawrence | 56 min |
| Jul 21, 1:16 PM EDT | Areal Flood Warning | BTV | St. Lawrence | 3 hr |
| Jul 21, 2:00 PM EDT | Special Weather Statement | BTV | St. Lawrence | 60 min |
Nearby
Flash Flood Warnings in Vermont, 2023Flash Flood Warnings in New York, 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.