Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 68, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 4, 2012, 3:47 PM EDT for Hillsborough County, New Hampshire. It was in force for 43 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
- Aug 4, 2012, 3:47 PM EDT (19:47 UTC)
- Expired
- Aug 4, 2012, 4:30 PM EDT
- In force
- 43 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
County Hillsborough County, NH
The radar
The Boston radar (KBOX), 138 km from the middle of the area, began a volume at 19:47 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, 7.8 hours before the alert went out and 148 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
- -285 J/kg
- Mixed-layer LCL
- 1552 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
296
WUUS51 KBOX 041947
SVRBOX
NHC011-042030-
/O.NEW.KBOX.SV.W.0068.120804T1947Z-120804T2030Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
347 PM EDT SAT AUG 4 2012
THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTH CENTRAL HILLSBOROUGH COUNTY IN SOUTHERN NEW HAMPSHIRE...
* UNTIL 430 PM EDT
* AT 343 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.
THIS STORM WAS LOCATED NEAR WEARE...OR 6 MILES SOUTH OF
HENNIKER...AND WAS MOVING NORTHEAST AT 10 MPH. TORRENTIAL RAINFALL
ALSO ACCOMPANIES THIS STORM.
* TOWNS IN THE WARNING INCLUDE WEARE AND HILLSBOROUGH.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL...AS WELL
AS DEADLY LIGHTNING AND TORRENTIAL RAIN. GET TO SAFE SHELTER NOW...
INSIDE A STURDY BUILDING OR IN A VEHICLE. DO NOT SEEK SHELTER UNDER
TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING. DRIVERS SHOULD BE ALERT FOR PONDING OF WATER AND AVOID
FLOODED ROADS.
&&
LAT...LON 4315 7167 4303 7175 4308 7184 4312 7185
4312 7184 4315 7168
TIME...MOT...LOC 1945Z 208DEG 7KT 4310 7178
$$
FIELD1 follow-up statement
648
WWUS51 KBOX 042010
SVSBOX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
410 PM EDT SAT AUG 4 2012
NHC011-042030-
/O.CON.KBOX.SV.W.0068.000000T0000Z-120804T2030Z/
HILLSBOROUGH NH-
410 PM EDT SAT AUG 4 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTH CENTRAL HILLSBOROUGH COUNTY...
AT 406 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL OVER WEARE...OR 7 MILES SOUTHEAST OF HENNIKER...MOVING
NORTHEAST AT 5 MPH. GUSTY WINDS...TORRENTIAL RAINFALL...AND FREQUENT
CLOUD TO GROUND LIGHTNING ALSO ACCOMPANY THIS STORM.
AT 356 PM...AN AMATEUR RADIO OPERATOR IN WEARE REPORTED 40 MPH
WINDS...SMALL BRANCHES DOWN...AND PEA SIZE HAIL ON CRANEY HILL ROAD
IN WEARE.
LAT...LON 4306 7176 4307 7179 4309 7180 4311 7179
4315 7168 4315 7167 4307 7172
TIME...MOT...LOC 2007Z 217DEG 6KT 4311 7174
$$
FIELDThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 1:57 PM EDT | Special Weather Statement | BOX | Hillsborough | 48 min |
| Aug 4, 2:43 PM EDT | Special Weather Statement | BOX | Hillsborough | 32 min |
| Aug 4, 3:36 PM EDT | Special Weather Statement | BOX | Hillsborough | 39 min |
| Aug 4, 3:59 PM EDT | Areal Flood Advisory | BOX | Hillsborough | 3 hr |
| Aug 4, 4:43 PM EDT | Areal Flood Advisory | BOX | Hillsborough | 3 hr |
| Aug 4, 5:06 PM EDT | Special Weather Statement | BOX | Hillsborough | 54 min |
| Aug 4, 5:28 PM EDT | Special Weather Statement | BOX | Hillsborough | 32 min |
| Aug 4, 6:02 PM EDT | Areal Flood Advisory | BOX | Cheshire, Hillsborough | 3 hr |
| Aug 4, 7:07 PM EDT | Special Weather Statement | BOX | Hillsborough | 53 min |
Nearby
Severe Thunderstorm Warnings in New Hampshire, 2012Every severe thunderstorm warning in 2012
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.