Alert archive / Massachusetts / Flash Flood Warnings in 2011
Flash Flood Warning 3, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this flash flood warning at Jun 1, 2011, 5:49 PM EDT for 4 counties in Massachusetts. It was in force for 3 hr. 1 report 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
- Jun 1, 2011, 5:49 PM EDT (21:49 UTC)
- Expired
- Jun 1, 2011, 8:20 PM EDT
- In force
- 3 hr
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bristol County, MA, Middlesex County, MA, Norfolk County, MA, Worcester County, MA
The radar
The Boston radar (KBOX), 36 km from the middle of the area, began a volume at 21:50 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 |
|---|---|---|---|
| Jun 1, 7:13 PM EDT | FLASH FLOOD | Walpole, MA | WEST STREET RAILROAD UNDERPASS FLOODED OUT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Chatham, MA (KCHH), launched 12:00Z, 9.8 hours before the alert went out and 134 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1250 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
714 WGUS51 KBOX 012149 FFWBOX MAC005-017-021-027-020045- /O.NEW.KBOX.FF.W.0003.110601T2149Z-110602T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TAUNTON MA 549 PM EDT WED JUN 1 2011 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHEASTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS... THIS INCLUDES THE CITY OF MILFORD... WESTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS... THIS INCLUDES THE CITY OF FRANKLIN... NORTH CENTRAL BRISTOL COUNTY IN SOUTHEAST MASSACHUSETTS... SOUTHERN MIDDLESEX COUNTY IN SOUTHEAST MASSACHUSETTS... THIS INCLUDES THE CITY OF FRAMINGHAM... * UNTIL 845 PM EDT * AT 541 PM EDT...RADAR INDICATED SEVERE THUNDERSTORMS MERGING OVER THE WARNING AREA. ADDITIONAL THUNDERSTORMS ARE BEHIND THIS CLUSTER. TORRENTIAL DOWNPOURS ARE EXPECTED AS THESE STORMS MOVE THROUGH THE WARNING AREA EARLY THIS EVENING. UP TO 3 INCHES OF RAIN MAY OCCUR IN ONE HOUR WITH THESE STORMS. AS A RESULT...URBAN FLASH FLOODING IS LIKELY. SMALL STREAM FLASH FLOODING MAY ALSO OCCUR. FLASH FLOODING OF SMALL STREAMS AND URBAN AREAS IS OCCURRING OR IMMINENT. AVOID FLOODED ROADS. THE WATER MAY BE TOO DEEP TO ALLOW VEHICLES TO CROSS SAFELY...OR THE ROADWAY MAY BE UNDERMINED. TURN AROUND...DONT DROWN! && LAT...LON 4232 7161 4232 7120 4201 7115 4203 7157 $$ NMB
2 follow-up statements
046 WGUS71 KBOX 012333 FFSBOX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 733 PM EDT WED JUN 1 2011 MAC005-017-021-027-020045- /O.CON.KBOX.FF.W.0003.000000T0000Z-110602T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MIDDLESEX MA-WORCESTER MA-NORFOLK MA-BRISTOL MA- 733 PM EDT WED JUN 1 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM EDT FOR SOUTHEASTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...AND WESTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...AND NORTH CENTRAL BRISTOL AND SOUTH CENTRAL MIDDLESEX COUNTIES IN SOUTHEAST MASSACHUSETTS... AT 727 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE LARGEST CLUSTER OF THUNDERSTORMS HAD TRACKED EAST OF THE WARNING AREA. HOWEVER...RADAR INDICATED ANOTHER THUNDERSTORM PRODUCING LOCALLY HEAVY RAINS THAT IS EXPECTED TO TRACK OVER LOCATIONS THAT HAD ALREADY RECEIVED HEAVY RAIN. THE THUNDERSTORM IS EXPECTED TO MOVE THROUGH THE MILFORD TO HOPKINTON AND MEDFIELD AREAS BETWEEN 730 AND 830 PM. URBAN FLASH FLOODING CONTINUES TO BE A RISK. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WESTWOOD... WELLESLEY...SOUTHBOROUGH...SHERBORN...NORWOOD...NEEDHAM...NATICK... MEDFIELD...HOPKINTON...HOLLISTON...FRAMINGHAM...DOVER AND ASHLAND PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT WEDNESDAY EVENING FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE AND CENTRAL RHODE ISLAND. && LAT...LON 4232 7161 4232 7120 4201 7115 4203 7157 $$ NMB
311 WGUS71 KBOX 020020 FFSBOX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 820 PM EDT WED JUN 1 2011 MAC005-017-021-027-020027- /O.CAN.KBOX.FF.W.0003.000000T0000Z-110602T0045Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MIDDLESEX MA-WORCESTER MA-NORFOLK MA-BRISTOL MA- 820 PM EDT WED JUN 1 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...AND WESTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...AND NORTH CENTRAL BRISTOL AND SOUTH CENTRAL MIDDLESEX COUNTIES IN SOUTHEAST MASSACHUSETTS... THUNDERSTORMS CONTINUE TO CROSS THROUGH THE AREA...AND ADDITIONAL THUNDERSTORMS ARE EXPECTED TO CROSS THROUGH THE MILFORD TO FRANKLIN AND FRAMINGHAM AREAS THROUGH 10 PM THIS EVENING. THESE STORMS WILL BRING WITH THEM THE POTENTIAL FOR MINOR URBAN AND POOR DRAINAGE FLOODING. HOWEVER...THE THREAT FOR MORE SIGNIFICANT FLASH FLOODING HAS DIMINISHED IN THE SHORT TERM. AS A RESULT...THE FLASH FLOOD WARNING HAS BEEN CANCELED. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT WEDNESDAY EVENING FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE AND CENTRAL RHODE ISLAND. LAT...LON 4232 7161 4232 7120 4201 7115 4203 7157 $$ NMB
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 8:25 AM EDT | Special Weather Statement | BOX | Middlesex | 50 min |
| Jun 1, 8:32 AM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex | 43 min |
| Jun 1, 8:48 AM EDT | Special Weather Statement | BOX | Suffolk | 42 min |
| Jun 1, 8:50 AM EDT | Special Marine Warning | BOX | 71 min | |
| Jun 1, 8:55 AM EDT | Special Weather Statement | BOX | Bristol | 50 min |
| Jun 1, 9:12 AM EDT | Special Weather Statement | BOX | Plymouth | 48 min |
| Jun 1, 9:40 AM EDT | Special Marine Warning | BOX | 50 min | |
| Jun 1, 9:41 AM EDT | Special Marine Warning | BOX | 64 min | |
| Jun 1, 10:00 AM EDT | Special Marine Warning | BOX | 39 min | |
| Jun 1, 10:22 AM EDT | Special Weather Statement | BOX | Barnstable | 38 min |
| Jun 1, 10:36 AM EDT | Special Marine Warning | BOX | 54 min | |
| Jun 1, 2:37 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire | 53 min |
| Jun 1, 2:58 PM EDT | Special Weather Statement | BOX | Hampshire | 62 min |
| Jun 1, 3:09 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 51 min |
| Jun 1, 3:28 PM EDT | Tornado Warning | BOX | Franklin, Hampden, Hampshire | 32 min |
| Jun 1, 3:32 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Middlesex, Worcester | 40 min |
| Jun 1, 3:56 PM EDT | Areal Flood Advisory | BOX | Franklin, Hampden, Hampshire | 3 hr |
| Jun 1, 4:05 PM EDT | Tornado Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 40 min |
| Jun 1, 4:15 PM EDT | Areal Flood Advisory | BOX | Franklin, Hampden, Hampshire, Worcester | 3 hr |
| Jun 1, 4:18 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire, Worcester | 42 min |
| Jun 1, 4:30 PM EDT | Tornado Warning | BOX | Hampden, Hampshire, Worcester | 45 min |
| Jun 1, 4:44 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Middlesex, Norfolk, Worcester | 61 min |
| Jun 1, 4:51 PM EDT | Areal Flood Advisory | BOX | Franklin, Hampshire, Worcester | 3 hr |
| Jun 1, 5:01 PM EDT | Tornado Warning | BOX | Franklin, Hampden, Hampshire, Middlesex, Norfolk, Worcester | 44 min |
| Jun 1, 5:06 PM EDT | Areal Flood Advisory | BOX | Hampden, Worcester | 3 hr |
| Jun 1, 5:17 PM EDT | Flash Flood Warning | BOX | Middlesex, Worcester | 3 hr |
| Jun 1, 5:17 PM EDT | Tornado Warning | BOX | Hampden, Norfolk, Worcester | 29 min |
| Jun 1, 5:38 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Norfolk, Worcester | 67 min |
| Jun 1, 5:46 PM EDT | Tornado Warning | BOX | Middlesex, Norfolk, Worcester | 44 min |
| Jun 1, 5:54 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Worcester | 52 min |
| Jun 1, 5:57 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 26 min |
| Jun 1, 6:00 PM EDT | Severe Thunderstorm Warning | BOX | Worcester | 45 min |
| Jun 1, 6:07 PM EDT | Tornado Warning | BOX | Hampden, Hampshire, Worcester | 53 min |
| Jun 1, 6:20 PM EDT | Special Marine Warning | BOX | 28 min | |
| Jun 1, 6:29 PM EDT | Areal Flood Advisory | BOX | Bristol, Norfolk, Plymouth, Suffolk | 2 hr |
| Jun 1, 6:31 PM EDT | Special Weather Statement | BOX | Norfolk | 59 min |
| Jun 1, 6:44 PM EDT | Special Weather Statement | BOX | Bristol, Plymouth | 61 min |
| Jun 1, 6:44 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Middlesex, Worcester | 30 min |
| Jun 1, 6:57 PM EDT | Tornado Warning | BOX | Hampden, Worcester | 63 min |
| Jun 1, 7:12 PM EDT | Tornado Warning | BOX | Franklin, Middlesex, Worcester | 48 min |
| Jun 1, 7:14 PM EDT | Special Marine Warning | BOX | 91 min | |
| Jun 1, 7:15 PM EDT | Areal Flood Advisory | BOX | Franklin, Middlesex, Worcester | 104 min |
| Jun 1, 7:55 PM EDT | Special Weather Statement | BOX | Bristol | 35 min |
| Jun 1, 7:56 PM EDT | Special Weather Statement | BOX | Hampden | 34 min |
| Jun 1, 7:57 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Middlesex, Norfolk, Plymouth, Suffolk, Worcester | 24 min |
| Jun 1, 7:59 PM EDT | Areal Flood Advisory | BOX | Hampden, Hampshire, Worcester | 66 min |
Nearby
Flash Flood Warnings in Massachusetts, 2011Every flash flood warning in 2011
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.