Alert archive / Massachusetts / Flash Flood Warnings in 2018
Flash Flood Warning 4, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this flash flood warning at Jul 5, 2018, 2:55 PM EDT for Franklin County, Massachusetts. It was in force for 37 min. 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 5, 2018, 2:55 PM EDT (18:55 UTC)
- Expired
- Jul 5, 2018, 3:32 PM EDT
- In force
- 37 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Flood severity
- None
County Franklin County, MA
The radar
The Albany radar (KENX), 127 km from the middle of the area, began a volume at 18:58 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 12:00Z, 6.9 hours before the alert went out and 109 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
- 18 J/kg
- Mixed-layer CIN
- -162 J/kg
- Mixed-layer LCL
- 1108 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
384 WGUS51 KBOX 051855 FFWBOX MAC011-052100- /O.NEW.KBOX.FF.W.0004.180705T1855Z-180705T2100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Boston/Norton MA 255 PM EDT THU JUL 5 2018 The National Weather Service in Boston/Norton has issued a * Flash Flood Warning for... Central Franklin County in western Massachusetts... * Until 500 PM EDT. * At 253 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Localized rainfall rates of 2 to 3 inches per hour are occurring with the strongest storms. Flash flooding is expected to begin shortly. * Some locations that will experience flooding include... Greenfield, Deerfield, Montague, Sunderland, Northfield, Conway, Leverett, Erving, Shutesbury, Gill, Whately and Wendell. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Warning means that flooding will occur quickly, and could be life threatening for those who try to drive through flooded roads or underpasses. Find alternate routes. Those near small streams need to get to higher ground immediately. && LAT...LON 4264 7241 4247 7238 4242 7268 4254 7271 $$ KJC
1 follow-up statement
601 WGUS71 KBOX 051932 FFSBOX Flash Flood Statement National Weather Service Boston/Norton MA 332 PM EDT THU JUL 5 2018 MAC011-051941- /O.CAN.KBOX.FF.W.0004.000000T0000Z-180705T2100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Franklin MA- 332 PM EDT THU JUL 5 2018 ...THE FLASH FLOOD WARNING FOR CENTRAL FRANKLIN COUNTY IS CANCELLED... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 4264 7241 4247 7238 4242 7268 4254 7271 $$ KJC
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 3:39 AM EDT | Small Craft Advisory | BOX | 58 hr | |
| Jul 5, 1:07 PM EDT | Special Weather Statement | BOX | Franklin | 38 min |
| Jul 5, 2:23 PM EDT | Special Weather Statement | BOX | Franklin | 52 min |
| Jul 5, 3:30 PM EDT | Flash Flood Watch | BOX | Barnstable, Bristol, Essex, Middlesex, Norfolk, Plymouth and 1 more | 24 hr |
Nearby
Flash Flood Warnings in Massachusetts, 2018Every flash flood warning in 2018
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.