Alert archive / North Carolina / Special Weather Statements in 2017

Special Weather Statement, NWS Raleigh, NC

March 31, 20174 counties in North Carolina

NWS Raleigh, NC issued this special weather statement at Mar 31, 2017, 6:02 AM EDT for 4 counties in North Carolina. It was in force for 58 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
Mar 31, 2017, 6:02 AM EDT (10:02 UTC)
Expired
Mar 31, 2017, 7:00 AM EDT
In force
58 min
Issued by
NWS Raleigh, NC

Counties Chatham County, NC, Lee County, NC, Moore County, NC, Randolph County, NC

The radar

The Raleigh/Durham radar (KRAX), 84 km from the middle of the area, began a volume at 10:05 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 10.0 hours before the alert went out and 64 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, Greensboro/Hi Pt, NC at 00:00Z on 2017-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Greensboro/Hi Pt, NC at 00:00Z on 2017-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 239 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1204 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
239 m²/s²
0-3 km storm-relative helicity
433 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 Raleigh, NC wrote its last area forecast discussion before this special weather statement went out at Mar 31, 3:28 AM EDT, 2 hours 34 minutes earlier.

Area forecast discussion, Mar 31, 3:28 AM EDT, 2 hours 34 minutes before
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  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <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.
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      <p id="message2">
        Please try again in a few minutes.
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Hazardous weather outlook, Mar 31, 3:47 AM EDT, 2 hours 15 minutes before
Hazardous Weather Outlook
National Weather Service Raleigh NC
347 AM EDT Fri Mar 31 2017

NCZ007>011-021>028-038>043-073>078-083>086-088-089-010800-
Person-Granville-Vance-Warren-Halifax-Forsyth-Guilford-Alamance-
Orange-Durham-Franklin-Nash-Edgecombe-Davidson-Randolph-Chatham-Wake-
Johnston-Wilson-Stanly-Montgomery-Moore-Lee-Harnett-Wayne-Anson-
Richmond-Scotland-Hoke-Cumberland-Sampson-
347 AM EDT Fri Mar 31 2017

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...Today and Tonight.

Widespread showers and thunderstorms are expected this morning. A
few of these storms could be strong to severe, with a risk of
damaging winds and perhaps an isolated tornado or two. The greatest
threat will be between 4 am and 11 am. Additional scattered storms
are expected this afternoon, and these will be capable of producing
strong straight line wind gusts in excess of 40 mph.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

A powerful storm system will cross the area early next week,
bringing a risk of strong to possibly severe thunderstorms, mainly
Monday evening through early Tuesday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

In the hours before

Special weather statement, Mar 31, 6:02 AM EDT, 0 minutes before
Special Weather Statement
National Weather Service Raleigh NC
602 AM EDT FRI MAR 31 2017

NCZ022-023-039-040-074>076-084-311100-
Guilford NC-Richmond NC-Lee NC-Chatham NC-Alamance NC-Randolph NC-
Moore NC-Montgomery NC-
602 AM EDT FRI MAR 31 2017

...An area of showers and strong thunderstorms will move northeast
across portions of southeastern Guilford...north central
Richmond...Lee...Chatham... southern Alamance...Randolph...Moore and
eastern Montgomery Counties Until 700 AM EDT...

At 559 AM EDT, Doppler radar was tracking an area of showers and
strong thunderstorms near Seagrove, Steeds and Candor, moving
northeast at 50 mph.

Wind gusts up to 40 mph and some small hail will be possible with
this storm.

Locations impacted include...
Burlington, Sanford, Asheboro, Southern Pines, Randleman, Pittsboro,
Carthage, Siler City, North Carolina Zoo and Pinehurst.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning, especially in urban areas where prolonged heavy rain
can quickly lead to flooding.

&&

LAT...LON 3607 7950 3592 7926 3588 7925 3587 7918
      3573 7896 3540 7908 3537 7912 3512 7949
      3511 7980 3551 7992 3586 7994
TIME...MOT...LOC 0959Z 224DEG 47KT 3552 7977

BLAES

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 31, 7:30 AM EDTSevere Thunderstorm WarningRAHCumberland, Harnett, Hoke45 min
Mar 31, 8:10 AM EDTSpecial Weather StatementRAHAlamance, Chatham, Durham, Granville, Orange, Person80 min
Mar 31, 8:16 AM EDTSpecial Weather StatementRAHDavidson, Forsyth, Guilford, Randolph59 min
Mar 31, 9:55 AM EDTSevere Thunderstorm WarningRAHEdgecombe, Sampson, Wayne, Wilson65 min
Mar 31, 12:22 PM EDTSpecial Weather StatementRAHVance23 min
Mar 31, 1:09 PM EDTSpecial Weather StatementRAHWarren36 min
Mar 31, 2:29 PM EDTSpecial Weather StatementRAHBladen16 min
Mar 31, 2:33 PM EDTSpecial Weather StatementRAHVance42 min
Mar 31, 3:20 PM EDTSpecial Weather StatementRAHWarren40 min
Mar 31, 4:05 PM EDTSpecial Weather StatementRAHGranville, Person55 min
Mar 31, 4:28 PM EDTSpecial Weather StatementRAHHalifax17 min
Mar 31, 4:48 PM EDTSpecial Weather StatementRAHWarren42 min
Mar 31, 4:51 PM EDTSevere Thunderstorm WarningRAHVance, Warren39 min
Mar 31, 5:19 PM EDTSpecial Weather StatementRAHHalifax26 min
Mar 31, 5:25 PM EDTSevere Thunderstorm WarningRAHHalifax20 min

Nearby

Special Weather Statements in North Carolina, 2017Every special weather statement in 2017

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.