Alert archive / New Hampshire / Frost Advisories in 2020

Frost Advisory 2, NWS Gray, ME

May 13, 2020Rockingham County, New Hampshire

NWS Gray, ME issued this frost advisory at May 13, 2020, 2:54 PM EDT for Rockingham County, New Hampshire. It took effect at May 14, 2020, 12:00 AM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: May 13, 2020, 2:54 PM EDT (18:54 UTC)
In effect from: May 14, 2020, 12:00 AM EDT
Expired: May 14, 2020, 6:32 AM EDT
In force: 7 hr
Issued by: NWS Gray, ME

County Rockingham County, NH

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 6.9 hours before the alert went out and 226 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1592 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 115 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 frost advisory 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 frost advisory went out at May 12, 7:06 PM EDT, 19 hours 48 minutes earlier.

Area forecast discussion, May 12, 7:06 PM EDT, 19 hours 48 minutes before

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Hazardous weather outlook, May 12, 3:19 PM EDT, 23 hours 35 minutes before

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<body>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 2:54 PM EDT	Freeze Warning	GYX	Androscoggin, Cumberland, Franklin, Kennebec, Knox, Lincoln and 5 more	16 hr

Nearby

Frost Advisories in New Hampshire, 2020 Every frost advisory in 2020

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.