Alert archive / Massachusetts / Areal Flood Warnings in 2021
Areal Flood Warning 21, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this areal flood warning at Jul 18, 2021, 10:37 PM EDT for Hampden County, Hampshire County, Massachusetts. It was in force for 4 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
- Jul 18, 2021, 10:37 PM EDT (02:37 UTC)
- Expired
- Jul 19, 2021, 3:03 AM EDT
- In force
- 4 hr
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hampden County, MA, Hampshire County, MA
The radar
The Albany radar (KENX), 105 km from the middle of the area, began a volume at 02:38 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
Albany, NY (KALY), launched 00:00Z, 2.6 hours before the alert went out and 92 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
- 12 J/kg
- Mixed-layer CIN
- -208 J/kg
- Mixed-layer LCL
- 527 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
538
WGUS41 KBOX 190237
FLWBOX
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Boston/Norton MA
1037 PM EDT Sun Jul 18 2021
MAC013-015-191430-
/O.NEW.KBOX.FA.W.0021.210719T0237Z-210719T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hampden MA-Hampshire MA-
1037 PM EDT Sun Jul 18 2021
The National Weather Service in Norton has issued a
* Flood Warning for...
Northwestern Hampden County in western Massachusetts...
Southwestern Hampshire County in western Massachusetts...
* Until 1030 AM EDT Monday.
* At 1037 PM EDT, Due to rain earlier this evening, the West Branch
of the Westfield River at Huntington, Massachusetts was in flood
and was still rising.
* Some locations that will experience flooding include...
Southampton, Huntington, Russell, Westhampton, Chester, Blandford
and Montgomery.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4218 7281 4218 7293 4225 7294 4233 7294
4232 7288 4231 7281
$$
BW1 follow-up statement
387
WGUS81 KBOX 190703
FLSBOX
Flood Statement
National Weather Service Boston/Norton MA
303 AM EDT Mon Jul 19 2021
MAC013-015-190713-
/O.CAN.KBOX.FA.W.0021.000000T0000Z-210719T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hampden MA-Hampshire MA-
303 AM EDT Mon Jul 19 2021
...FLOOD WARNING IS CANCELLED FOR NORTHWESTERN HAMPDEN AND
SOUTHWESTERN HAMPSHIRE COUNTIES...
Flood waters have receded. The West Branch of the Westfield River at
Huntington, Massachusetts is no longer in flood. Please continue to
heed remaining road closures.
LAT...LON 4218 7281 4218 7293 4225 7294 4233 7294
4232 7288 4231 7281
$$
BWThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 9:15 PM EDT | Special Weather Statement | BOX | Franklin | 90 min |
| Jul 18, 9:26 PM EDT | Flash Flood Warning | BOX | Franklin, Hampshire, Worcester | 3 hr |
| Jul 19, 12:26 AM EDT | Areal Flood Warning | BOX | Hampshire | 119 min |
| Jul 19, 12:32 AM EDT | Areal Flood Warning | BOX | Franklin, Worcester | 118 min |
| Jul 19, 4:25 AM EDT | Areal Flood Warning | BOX | Hampden | 2 hr |
| Jul 19, 6:24 AM EDT | River Flood Warning | BOX | Hampden, Hampshire | 5 hr |
Nearby
Areal Flood Warnings in Massachusetts, 2021Every areal 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.