Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 21, NWS Gray, ME

June 23, 2013Coos County, Grafton County, New Hampshire

NWS Gray, ME issued this severe thunderstorm warning at Jun 23, 2013, 2:25 PM EDT for Coos County, Grafton County, New Hampshire. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 23, 2013, 2:25 PM EDT (18:25 UTC)
Expired
Jun 23, 2013, 3:15 PM EDT
In force
50 min
Issued by
NWS Gray, ME
Area
Storm-based polygon

Counties Coos County, NH, Grafton County, NH

The radar

The Portland,ME radar (KGYX), 114 km from the middle of the area, began a volume at 18:26 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

Albany, NY (KALY), launched 12:00Z, 6.4 hours before the alert went out and 257 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, Albany, NY at 12:00Z on 2013-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 64 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, Albany, NY at 12:00Z on 2013-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 139 square meters per square second.1939Sfc1 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
64 J/kg
Mixed-layer CIN
-217 J/kg
Mixed-layer LCL
1012 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
139 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jun 23, 9:56 AM EDT, 4 hours 29 minutes earlier.

Area forecast discussion, Jun 23, 9:56 AM EDT, 4 hours 29 minutes before
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Hazardous weather outlook, Jun 23, 2:06 PM EDT, 19 minutes before
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In the hours before

Special weather statement, Jun 23, 2:08 PM EDT, 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
208 PM EDT SUN JUN 23 2013

NHZ002-003-231900-
NORTHERN GRAFTON-SOUTHERN COOS-
208 PM EDT SUN JUN 23 2013

...STRONG THUNDERSTORMS WILL IMPACT COOS COUNTY AND GRAFTON COUNTY
THROUGH 300 PM EDT...

AT 204 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF STRONG THUNDERSTORMS CENTERED NEAR ST. JOHNSBURY VERMONT
...MOVING TO THE EAST AT 25 MPH. THIS CLUSTER OF STRONG
THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND LITTLETON...DALTON...
GILMAN...FOREST LAKE STATE PARK...WHITEFIELD...TWIN MOUNTAIN...
CARROLL AND JEFFERSON THROUGH 300 PM EDT.

THESE THUNDERSTORMS CAN PRODUCE WIND GUSTS UP TO 50 MPH...HEAVY RAIN
AND FREQUENT LIGHTNING STRIKES. THE HEAVY RAIN COULD LOWER
VISIBILITY TO NEAR ZERO AND CAUSE PONDING OF WATER IN POOR DRAINAGE
AREAS.

IF YOU ARE OUTDOORS AND STORMS APPROACH YOUR LOCATION...MOVE INDOORS
OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE MORE THAN 5
MILES AWAY FROM THE PARENT THUNDERSTORM.

LAT...LON 4435 7192 4434 7186 4436 7183 4441 7179
      4442 7170 4445 7167 4447 7165 4449 7142
      4424 7150 4434 7194

SJC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 23, 4:09 PM EDTSevere Thunderstorm WarningGYXCumberland, Oxford51 min
Jun 23, 4:19 PM EDTSpecial Weather StatementGYXCumberland26 min
Jun 23, 4:42 PM EDTSevere Thunderstorm WarningGYXCumberland, Oxford48 min
Jun 23, 4:44 PM EDTSevere Thunderstorm WarningGYXAndroscoggin, Cumberland, Oxford31 min
Jun 23, 4:48 PM EDTSpecial Weather StatementGYXYork42 min
Jun 23, 5:01 PM EDTSevere Thunderstorm WarningGYXYork44 min
Jun 23, 5:16 PM EDTSpecial Weather StatementGYXFranklin29 min
Jun 23, 5:18 PM EDTSevere Thunderstorm WarningGYXCumberland42 min
Jun 23, 5:44 PM EDTSevere Thunderstorm WarningGYXYork46 min
Jun 23, 5:48 PM EDTSpecial Marine WarningGYX87 min
Jun 23, 5:52 PM EDTSevere Thunderstorm WarningGYXCumberland38 min
Jun 23, 6:06 PM EDTSpecial Marine WarningGYX84 min
Jun 23, 6:30 PM EDTSevere Thunderstorm WarningGYXCumberland, Oxford, York45 min
Jun 23, 6:37 PM EDTSpecial Weather StatementGYXCumberland38 min
Jun 23, 6:50 PM EDTSpecial Weather StatementGYXFranklin40 min
Jun 23, 7:24 PM EDTSpecial Weather StatementGYXYork51 min
Jun 23, 7:53 PM EDTSevere Thunderstorm WarningGYXYork37 min
Jun 23, 3:18 PM EDTSpecial Weather StatementGYXCoos42 min
Jun 23, 3:33 PM EDTSevere Thunderstorm WarningGYXCarroll, Coos, Grafton42 min
Jun 23, 3:47 PM EDTFlash Flood WarningGYXCoos, Grafton3 hr
Jun 23, 3:58 PM EDTSevere Thunderstorm WarningGYXCarroll, Coos, Grafton32 min
Jun 23, 4:58 PM EDTSpecial Weather StatementGYXCarroll47 min
Jun 23, 5:03 PM EDTSevere Thunderstorm WarningGYXCarroll, Coos, Grafton42 min
Jun 23, 5:23 PM EDTSpecial Weather StatementGYXCarroll37 min
Jun 23, 5:31 PM EDTAreal Flood AdvisoryGYXCarroll, Coos, Grafton119 min
Jun 23, 5:53 PM EDTSpecial Weather StatementGYXCarroll37 min
Jun 23, 6:10 PM EDTSpecial Weather StatementGYXGrafton35 min
Jun 23, 7:09 PM EDTSpecial Weather StatementGYXBelknap51 min
Jun 23, 7:31 PM EDTSpecial Weather StatementGYXBelknap44 min
Jun 23, 2:08 PM EDTSpecial Weather StatementGYXCaledonia52 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2013Every severe thunderstorm warning in 2013

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.