Alert archive / Massachusetts / Mesoscale Discussions in 2006
Mesoscale Discussion 1421
The Storm Prediction Center issued this mesoscale discussion at Jul 2, 2006, 7:48 PM EDT for 5 states. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Jul 2, 2006, 7:48 PM EDT (23:48 UTC)
- Expired
- Jul 2, 2006, 9:15 PM EDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 33 counties
Berkshire County, MA, Bristol County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA, Androscoggin County, ME, Cumberland County, ME, Franklin County, ME, Kennebec County, ME, Oxford County, ME, Sagadahoc County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH, Bristol County, RI, Providence County, RI, Essex County, VT, Windham County, VT, Windsor County, VT
The radar
The Boston radar (KBOX), 120 km from the middle of the area, began a volume at 23:49 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
Gray, ME (KGYX), launched 12:00Z, 11.8 hours before the alert went out and 122 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
- 1049 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 278 m²/s²
- 0-3 km storm-relative helicity
- 280 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 022349 SWOMCD SPC MCD 022348 MEZ000-MAZ000-NHZ000-RIZ000-VTZ000-CTZ000-NYZ000-030115- MESOSCALE DISCUSSION 1421 NWS STORM PREDICTION CENTER NORMAN OK 0648 PM CDT SUN JUL 02 2006 AREAS AFFECTED...CT...MA...ME...NH...RI CONCERNING...SEVERE THUNDERSTORM WATCH 575... VALID 022348Z - 030115Z TSTM ACTIVITY HAS BEEN ISOLATED AND SUB-SEVERE ACROSS WATCH 575 SO FAR. STRONGER STORMS ASSOCIATED WITH THE MID LEVEL WIND MAX AND APPROACHING FRONT HAVE REMAINED CONFINED TO NRN ME AND SRN QUEBEC THROUGH THE EVENING. HOWEVER...DIAGNOSTIC DATA INDICATED THAT INSTABILITY AXIS WAS SITUATED FROM MA/SRN NH NEWD INTO WRN ME AND COULD STILL FUEL CONVECTIVE DEVELOPMENT AS THE FRONT MOVES ACROSS NRN PORTIONS OF WATCH 575 OVER THE NEXT COUPLE OF HOURS. FARTHER SOUTH...FORCING FOR DEVELOPMENT APPEARS TO BE MORE LIMITED AND TIME OF DAY WILL ALSO HINDER ROBUST TSTM DEVELOP. THEREFORE... PORTIONS OF WATCH 575 ARE LIKELY TO BE CANCELED PRIOR TO EXPIRATION. ..CARBIN.. 07/02/2006 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...CAR...GYX...BOX...BTV...OKX...ALY... 41697072 41697365 45077177 45046923
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 11:19 AM EDT | Mesoscale Discussion | SPC | 86 min | |
| Jul 2, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | Northwest Hills Planning Region | 7 hr |
| Jul 2, 3:45 PM EDT | Mesoscale Discussion | SPC | 60 min | |
| Jul 2, 4:03 PM EDT | Severe Thunderstorm Watch | SPC | Greater Bridgeport Planning Region | 5 hr |
| Jul 2, 5:53 PM EDT | Severe Thunderstorm Watch | SPC | Capitol Planning Region, Northeastern Connecticut Planning Region | 4 hr |
| Jul 2, 6:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
Nearby
Mesoscale Discussions in Massachusetts, 2006Mesoscale Discussions in New Hampshire, 2006Mesoscale Discussions in Maine, 2006Every mesoscale discussion in 2006
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.