Alert archive / New Hampshire / Special Weather Statements in 2021

Special Weather Statement, NWS Gray, ME

July 6, 2021Rockingham County, New Hampshire

NWS Gray, ME issued this special weather statement at Jul 6, 2021, 5:07 PM EDT for Rockingham County, New Hampshire. It was in force for 23 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
Jul 6, 2021, 5:07 PM EDT (21:07 UTC)
Expired
Jul 6, 2021, 5:30 PM EDT
In force
23 min
Issued by
NWS Gray, ME

County Rockingham County, NH

The radar

The Boston radar (KBOX), 98 km from the middle of the area, began a volume at 21:06 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, 9.1 hours before the alert went out and 136 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.

Skew-T log-pSkew-T log-p diagram, Gray, ME at 12:00Z on 2021-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 47 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Gray, ME at 12:00Z on 2021-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 152 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
47 J/kg
Mixed-layer CIN
-182 J/kg
Mixed-layer LCL
717 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
152 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Gray, ME wrote its last area forecast discussion before this special weather statement went out at Jul 6, 4:05 PM EDT, 1 hour 2 minutes earlier.

Area forecast discussion, Jul 6, 4:05 PM EDT, 1 hour 2 minutes before
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Hazardous weather outlook, Jul 6, 3:45 PM EDT, 1 hour 22 minutes before
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In the hours before

Special weather statement, Jul 6, 4:32 PM EDT, 35 minutes before
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Special weather statement, Jul 6, 4:58 PM EDT, 9 minutes before
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Special weather statement, Jul 6, 5:07 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Gray ME
507 PM EDT Tue Jul 6 2021

NHZ013-062130-
Interior Rockingham-
507 PM EDT Tue Jul 6 2021

...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL ROCKINGHAM
COUNTY...

At 506 PM EDT, a strong thunderstorm was located near Salem, moving
east at 30 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Derry, Salem, Hampstead, Atkinson, Kingston, Danville, East Kingston,
Newton, South Hampton, Plaistow and Sandown.

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 4280 7123 4292 7124 4289 7093 4287 7097
      4286 7103 4285 7105 4281 7107 4282 7113
      4281 7116 4279 7119
TIME...MOT...LOC 2106Z 275DEG 24KT 4286 7114

Clair

The office that day

Everything else NWS Gray, ME issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 6, 5:26 AM EDTDense Fog AdvisoryGYXAndroscoggin, Cumberland, Kennebec, Knox, Lincoln, Sagadahoc and 2 more3 hr
Jul 6, 4:32 PM EDTSpecial Weather StatementGYXHillsborough28 min
Jul 6, 4:58 PM EDTSpecial Weather StatementGYXHillsborough32 min
Jul 6, 7:34 PM EDTSpecial Weather StatementGYXCarroll26 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.