Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 13, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at May 24, 2009, 3:05 PM EDT for Norfolk County, Plymouth County, Massachusetts. It was in force for 40 min. 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
- May 24, 2009, 3:05 PM EDT (19:05 UTC)
- Expired
- May 24, 2009, 3:45 PM EDT
- In force
- 40 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
Counties Norfolk County, MA, Plymouth County, MA
The radar
The Boston radar (KBOX), 26 km from the middle of the area, began a volume at 19:05 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 |
|---|---|---|---|
| May 24, 3:15 PM EDT | HAIL 0.75 | Avon, MA | MIXED WITH SMALL HAIL...LASTING FOR 7 MINUTES. |
| May 24, 3:20 PM EDT | HAIL 1 | 2 Nne Brockton, MA | NORTHEAST BROCKTON NEAR AVON LINE. |
| May 24, 3:55 PM EDT | TSTM WND DMG | Hanson, MA | WIRES DOWN AND ARCING AT INTERSECTION OF ROUTE 27 AND 58. |
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, 7.1 hours before the alert went out and 94 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
- 658 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KBOX 241905 SVRBOX MAC021-023-241945- /O.NEW.KBOX.SV.W.0013.090524T1905Z-090524T1945Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAUNTON MA 305 PM EDT SUN MAY 24 2009 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL NORFOLK COUNTY IN EASTERN MASSACHUSETTS... NORTH CENTRAL PLYMOUTH COUNTY IN SOUTHEAST MASSACHUSETTS... * UNTIL 345 PM EDT * AT 302 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR AVON...OR NEAR BROCKTON...AND MOVING EAST AT 20 MPH. * SOME LOCATIONS IN THE WARNING INCLUDE... HOLBROOK...ABINGTON... WHITMAN...ROCKLAND...HANSON AND HANOVER SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL...IN ADDITION TO DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR SAFETY GO INDOORS NOW AND STAY AWAY FROM WINDOWS. MINOR POOR DRAINAGE FLOODING IS ALSO EXPECTED. DRIVERS SHOULD AVOID FLOODED ROADWAYS. LAT...LON 4216 7078 4204 7082 4212 7112 4218 7111 TIME...MOT...LOC 1905Z 281DEG 16KT 4213 7103 $$ WTB
1 follow-up statement
000 WWUS51 KBOX 241930 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 330 PM EDT SUN MAY 24 2009 MAC021-023-241945- /O.CON.KBOX.SV.W.0013.000000T0000Z-090524T1945Z/ NORFOLK MA-PLYMOUTH MA- 330 PM EDT SUN MAY 24 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT FOR NORTH CENTRAL PLYMOUTH AND EAST CENTRAL NORFOLK COUNTIES... AT 327 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR ROCKLAND...OR 7 MILES EAST OF BROCKTON...MOVING EAST AT 20 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HANSON AND HANOVER THIS THUNDERSTORM HAS A HISTORY OF PRODUCING LARGE HAIL. THE STORM PRODUCED ONE INCH DIAMETER HAIL IN NORTHEAST BROCKTON AT 320 PM AND THREE-QUARTER INCH HAIL AT AVON AT 315 PM. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS LAT...LON 4216 7078 4204 7082 4212 7112 4218 7111 TIME...MOT...LOC 1927Z 281DEG 16KT 4211 7090 $$ WTB
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 1:55 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Suffolk | 24 min |
| May 24, 2:21 PM EDT | Special Marine Warning | BOX | 165 days | |
| May 24, 2:32 PM EDT | Severe Thunderstorm Warning | BOX | Worcester | 43 min |
| May 24, 3:07 PM EDT | Special Marine Warning | BOX | 13 min | |
| May 24, 3:45 PM EDT | Severe Thunderstorm Warning | BOX | Plymouth | 45 min |
| May 24, 4:01 PM EDT | Special Marine Warning | BOX | 59 min | |
| May 24, 4:07 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Worcester | 18 min |
| May 24, 4:28 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Suffolk | 32 min |
| May 24, 4:29 PM EDT | Severe Thunderstorm Warning | BOX | Worcester | 15 min |
| May 24, 4:38 PM EDT | Special Marine Warning | BOX | 67 min | |
| May 24, 4:46 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Worcester | 44 min |
| May 24, 5:14 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Worcester | 31 min |
| May 24, 5:46 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Worcester | 19 min |
| May 24, 6:13 PM EDT | Special Marine Warning | BOX | 32 min | |
| May 24, 6:27 PM EDT | Special Marine Warning | BOX | 63 min | |
| May 24, 6:51 PM EDT | Special Marine Warning | BOX | 24 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 2009Every severe thunderstorm warning in 2009
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.