Alert archive / Massachusetts / Flash Flood Warnings in 2017
Flash Flood Warning 19, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this flash flood warning at Aug 2, 2017, 4:08 PM EDT for Middlesex County, Worcester County, Massachusetts. It was in force for 3 hr. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 2, 2017, 4:08 PM EDT (20:08 UTC)
- Expired
- Aug 2, 2017, 7:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Middlesex County, MA, Worcester County, MA
The radar
The Boston radar (KBOX), 89 km from the middle of the area, began a volume at 20:11 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 2, 4:33 PM EDT | FLOOD | Westminster, MA | SIGNIFICANT STREET FLOODING AND DEBRIS IN ROAD REDUCING TRAVEL TO ONE LANE |
| Aug 2, 4:33 PM EDT | FLOOD | Westminster, MA | SIGNIFICANT STREET FLOODING AND DEBRIS IN ROAD REDUCING TRAVEL TO ONE LANE ON SOUTH ASH STREET |
| Aug 2, 5:08 PM EDT | FLOOD | Fitchburg, MA | 2 FEET OF WATER ON ROUTE 31 |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 8.1 hours before the alert went out and 172 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
- 312 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 1098 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
113 WGUS51 KBOX 022008 FFWBOX MAC017-027-022315- /O.NEW.KBOX.FF.W.0019.170802T2008Z-170802T2315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Taunton MA 408 PM EDT WED AUG 2 2017 The National Weather Service in Taunton has issued a * Flash Flood Warning for... Northeastern Worcester County in central Massachusetts... Northwestern Middlesex County in northeastern Massachusetts... * Until 715 PM EDT * At 407 PM EDT, Doppler radar indicated thunderstorms producing torrential rain in north central Massachusetts. Flash flooding is expected to begin shortly, including rapid inundation of roads and underpasses. * Some locations that will experience flooding include... Leominster, Fitchburg, Gardner, Pepperell, Groton, Lunenburg, Townsend, Ayer, Westminster, Shirley, Harvard, Ashburnham and Ashby. 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 4269 7158 4269 7194 4253 7195 4253 7159 $$ JWD
2 follow-up statements
345 WGUS71 KBOX 022111 FFSBOX Flash Flood Statement National Weather Service Taunton MA 511 PM EDT WED AUG 2 2017 MAC017-027-022315- /O.CON.KBOX.FF.W.0019.000000T0000Z-170802T2315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Worcester MA-Middlesex MA- 511 PM EDT WED AUG 2 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM EDT FOR NORTHEASTERN WORCESTER AND NORTHWESTERN MIDDLESEX COUNTIES... At 509 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across parts of north central Massachusetts. Over two inches of rain have already fallen in parts of the area. A spotter reported two feet of water on Route 31 in North Fitchburg. Although the rain has begun to lessen in intensity, additional flooding of roads and underpasses can be expected. Do not drive through flooded roads! Some locations that will experience flooding include... Leominster, Fitchburg, Gardner, Pepperell, Groton, Lunenburg, Townsend, Ayer, Westminster, Shirley, Harvard, Ashburnham and Ashby. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Warning means that flooding will occur quickly, and could be life threatening for those who try to drive through flooded roads or underpasses. Find alternate routes. Those near small streams need to get to higher ground immediately. && LAT...LON 4269 7158 4269 7194 4253 7195 4253 7159 $$ JWD
494 WGUS71 KBOX 022159 FFSBOX Flash Flood Statement National Weather Service Taunton MA 559 PM EDT WED AUG 2 2017 MAC017-027-022209- /O.CAN.KBOX.FF.W.0019.000000T0000Z-170802T2315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Worcester MA-Middlesex MA- 559 PM EDT WED AUG 2 2017 ...THE FLASH FLOOD WARNING FOR NORTHEASTERN WORCESTER AND NORTHWESTERN MIDDLESEX COUNTIES IS CANCELLED... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures and avoid flooded roadways. && LAT...LON 4269 7158 4269 7194 4253 7195 4253 7159 $$ JWD
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 11:55 AM EDT | Flash Flood Watch | BOX | Essex, Franklin, Hampden, Hampshire, Middlesex, Norfolk and 2 more | 8 hr |
| Aug 2, 1:00 PM EDT | Special Weather Statement | BOX | Worcester | 30 min |
| Aug 2, 2:00 PM EDT | Special Weather Statement | BOX | Norfolk | 45 min |
| Aug 2, 2:05 PM EDT | Flash Flood Warning | BOX | Norfolk | 3 hr |
| Aug 2, 2:12 PM EDT | Special Weather Statement | BOX | Hampshire | 33 min |
| Aug 2, 2:13 PM EDT | Flash Flood Warning | BOX | Franklin, Hampshire | 3 hr |
| Aug 2, 2:16 PM EDT | Special Weather Statement | BOX | Suffolk | 29 min |
| Aug 2, 2:21 PM EDT | Special Marine Warning | BOX | 39 min | |
| Aug 2, 2:22 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire | 38 min |
| Aug 2, 2:24 PM EDT | Flash Flood Warning | BOX | Hampden, Hampshire | 3 hr |
| Aug 2, 2:26 PM EDT | Severe Thunderstorm Warning | BOX | Suffolk | 34 min |
| Aug 2, 2:29 PM EDT | Flash Flood Warning | BOX | Suffolk | 3 hr |
| Aug 2, 2:34 PM EDT | Special Weather Statement | BOX | Essex, Middlesex | 41 min |
| Aug 2, 2:37 PM EDT | Special Weather Statement | BOX | Plymouth | 38 min |
| Aug 2, 2:42 PM EDT | Flash Flood Warning | BOX | Middlesex | 3 hr |
| Aug 2, 2:46 PM EDT | Special Marine Warning | BOX | 59 min | |
| Aug 2, 2:50 PM EDT | Special Marine Warning | BOX | 40 min | |
| Aug 2, 2:52 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex | 38 min |
| Aug 2, 2:57 PM EDT | Special Weather Statement | BOX | Essex | 48 min |
| Aug 2, 3:01 PM EDT | Special Weather Statement | BOX | Worcester | 44 min |
| Aug 2, 3:02 PM EDT | Special Weather Statement | BOX | Hampden | 43 min |
| Aug 2, 3:10 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire | 50 min |
| Aug 2, 3:13 PM EDT | Special Weather Statement | BOX | Essex | 47 min |
| Aug 2, 3:29 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 32 min |
| Aug 2, 3:33 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex | 29 min |
| Aug 2, 3:44 PM EDT | Special Weather Statement | BOX | Middlesex | 46 min |
| Aug 2, 3:50 PM EDT | Special Marine Warning | BOX | 55 min | |
| Aug 2, 3:54 PM EDT | Special Weather Statement | BOX | Suffolk | 51 min |
| Aug 2, 4:00 PM EDT | Severe Thunderstorm Warning | BOX | Worcester | 45 min |
| Aug 2, 4:11 PM EDT | Special Weather Statement | BOX | Suffolk | 49 min |
| Aug 2, 4:42 PM EDT | Special Marine Warning | BOX | 63 min | |
| Aug 2, 4:43 PM EDT | Special Weather Statement | BOX | Suffolk | 32 min |
| Aug 2, 4:48 PM EDT | Severe Thunderstorm Warning | BOX | Worcester | 31 min |
| Aug 2, 4:56 PM EDT | Areal Flood Warning | BOX | Plymouth | 2 hr |
| Aug 2, 5:04 PM EDT | Special Weather Statement | BOX | Suffolk | 41 min |
| Aug 2, 5:09 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Worcester | 38 min |
| Aug 2, 5:17 PM EDT | Flash Flood Warning | BOX | Middlesex, Norfolk, Worcester | 118 min |
| Aug 2, 5:26 PM EDT | Flash Flood Warning | BOX | Suffolk | 2 hr |
| Aug 2, 5:43 PM EDT | Special Marine Warning | BOX | 62 min | |
| Aug 2, 6:15 PM EDT | Special Weather Statement | BOX | Norfolk | 45 min |
| Aug 2, 6:36 PM EDT | Special Weather Statement | BOX | Norfolk | 39 min |
| Aug 2, 6:44 PM EDT | Flash Flood Warning | BOX | Norfolk, Suffolk | 2 hr |
Nearby
Flash Flood Warnings in Massachusetts, 2017Every flash flood warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.