Alert archive / New Hampshire / Special Weather Statements in 2021
Special Weather Statement, NWS Gray, ME
NWS Gray, ME issued this special weather statement at Jul 7, 2021, 4:21 PM EDT for Rockingham County, New Hampshire. It was in force for 24 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
- Jul 7, 2021, 4:21 PM EDT (20:21 UTC)
- Expired
- Jul 7, 2021, 4:45 PM EDT
- In force
- 24 min
- Issued by
- NWS Gray, ME
County Rockingham County, NH
The radar
The Boston radar (KBOX), 90 km from the middle of the area, began a volume at 20:21 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 |
|---|---|---|---|
| Jul 7, 4:38 PM EDT | HAIL 1.25 | Pelham, NH | SHREDDED LEAVES AND COVERED PARTS OF LAWNS. |
| Jul 7, 4:40 PM EDT | HAIL 1 | 2 E Pelham, NH | |
| Jul 7, 4:45 PM EDT | TSTM WND DMG | 1 S Pelham, NH | DOWNED TREES HIGHWAY 38. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Gray, ME (KGYX), launched 12:00Z, 8.4 hours before the alert went out and 151 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
- 1184 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
437
WWUS81 KGYX 072021
SPSGYX
Special Weather Statement
National Weather Service Gray ME
421 PM EDT Wed Jul 7 2021
NHZ012-013-072045-
Interior Rockingham-Eastern Hillsborough-
421 PM EDT Wed Jul 7 2021
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN ROCKINGHAM AND
SOUTHEASTERN HILLSBOROUGH COUNTIES...
At 420 PM EDT, a strong thunderstorm was located near Hudson, or near
Derry, moving east at 30 mph.
Winds in excess of 40 mph and pea size hail are possible with this
storm.
Locations impacted include...
Nashua, Salem, Litchfield, Hudson, Pelham, Londonderry, Atkinson and
Windham.
This includes Interstate 93 between mile markers 1 and 8.
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4277 7148 4285 7142 4282 7115 4279 7119
4274 7118 4274 7119 4275 7122 4274 7125
4270 7129 4270 7132
TIME...MOT...LOC 2020Z 286DEG 33KT 4280 7136
$$
ClairThe office that day
Everything else NWS Gray, ME issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 8:11 PM EDT | Special Weather Statement | GYX | Androscoggin | 34 min |
| Jul 6, 8:34 PM EDT | Severe Thunderstorm Warning | GYX | Androscoggin, Cumberland, Kennebec, Oxford, Sagadahoc | 41 min |
| Jul 6, 8:55 PM EDT | Special Weather Statement | GYX | Kennebec | 35 min |
| Jul 6, 8:58 PM EDT | Special Weather Statement | GYX | York | 47 min |
| Jul 6, 8:00 PM EDT | Special Weather Statement | GYX | Carroll | 30 min |
| Jul 7, 4:36 PM EDT | Severe Thunderstorm Warning | GYX | Hillsborough, Rockingham | 11 min |
| Jul 7, 6:08 PM EDT | Special Weather Statement | GYX | Hillsborough | 37 min |
| Jul 7, 7:53 PM EDT | Special Weather Statement | GYX | Cheshire, Hillsborough | 37 min |
Nearby
Special Weather Statements in New Hampshire, 2021Every special weather statement in 2021
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.