Alert archive / North Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 223, NWS Raleigh, NC

July 16, 2012Forsyth County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Jul 16, 2012, 8:42 PM EDT for Forsyth County, North Carolina. It was in force for 63 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: Jul 16, 2012, 8:42 PM EDT (00:42 UTC)
Expired: Jul 16, 2012, 9:45 PM EDT
In force: 63 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

County Forsyth County, NC

The radar

The Roanoke radar (KFCX), 99 km from the middle of the area, began a volume at 00:45 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, 0.7 hours before the alert went out and 32 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: 1270 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1386 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 61 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 Raleigh, NC wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 16, 8:22 PM EDT, 20 minutes earlier.

Area forecast discussion, Jul 16, 8:22 PM EDT, 20 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Jul 16, 10:11 AM EDT, 10 hours 31 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RALEIGH NC
1011 AM EDT MON JUL 16 2012

NCZ007>011-021>028-038>043-073>078-083>086-088-089-171415-
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-
1011 AM EDT MON JUL 16 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

SCATTERED STRONG THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON
THROUGH EARLY THIS EVENING. THE PRIMARY SEVERE WEATHER THREAT WILL
BE DAMAGING WIND GUSTS. IN ADDITION...THERE IS A CHANCE OF LARGE
HAIL WITH THE STRONGEST THUNDERSTORMS. LOCALLY HEAVY RAIN COULD
ALSO PRODUCE SOME FLOODING IN URBAN OR POOR DRAINAGE AREAS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

HEAT INDICES WILL LIKELY CLIMB INTO THE 100 TO 105 DEGREE RANGE
DURING THE AFTERNOON ON TUESDAY AND ESPECIALLY WEDNESDAY.

BLAES

In the hours before

Special weather statement, Jul 16, 4:18 PM EDT, 4 hours 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
418 PM EDT MON JUL 16 2012

NCZ007-023>025-162115-
ALAMANCE-DURHAM-ORANGE-PERSON-
418 PM EDT MON JUL 16 2012

...STRONG THUNDERSTORMS WILL MOVE ACROSS PERSON...ORANGE...DURHAM AND
ALAMANCE COUNTIES THROUGH 515 PM EDT...

AT 415 PM EDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OVER
CARR...OR ABOUT OVER PROSPECT HILL...MOVING SOUTHEAST AT 10 MPH.

LOCATIONS IN THE PATH OF THESE STORMS INCLUDE SCHLEY...
HILLSBOROUGH...CARR...UNION RIDGE...BUSHY FORK...ROUGEMONT...AND
BAHAMA.

HAZARDS INCLUDE...
GUSTY WINDS UP TO 50 MPH.
DEADLY CLOUD TO GROUND LIGHTNING.
HEAVY RAINFALL AND MINOR FLOODING.

THIS INCLUDES INTERSTATE 40 BETWEEN EXITS 145 AND 263...AND
INTERSTATE 85 BETWEEN EXITS 164 AND 183.

WIND GUSTS UP TO 50 MPH ARE CAPABLE OF KNOCKING DOWN TREE LIMBS AND
BLOWING AROUND TRASH CANS...POTTED PLANTS...LAWN FURNITURE AND OTHER
LIGHT OUTDOOR OBJECTS.

HEAVY RAINFALL ASSOCIATED WITH THESE STORMS WILL CAUSE MINOR
FLOODING OF LOW LYING AREAS INCLUDING DITCHES...CREEKS...ROADWAYS
AND AREAS OF POOR DRAINAGE. MOTORISTS SHOULD USE EXTRA CAUTION AND
REDUCE DRIVING SPEEDS TO AVOID HYDROPLANING...ESPECIALLY ON
INTERSTATE 40 BETWEEN EXITS 145 AND 263...AND INTERSTATE 85 BETWEEN
EXITS 164 AND 183.

&&

LAT...LON 3648 7895 3615 7880 3609 7881 3606 7878
      3592 7941 3625 7946 3625 7916 3639 7915
TIME...MOT...LOC 2015Z 322DEG 11KT 3626 7916

VINCENT

Special weather statement, Jul 16, 4:58 PM EDT, 3 hours 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
458 PM EDT MON JUL 16 2012

NCZ008-025-162145-
DURHAM-GRANVILLE-
458 PM EDT MON JUL 16 2012

...A STRONG THUNDERSTORM WILL MOVE ACROSS GRANVILLE AND DURHAM
COUNTIES THROUGH 545 PM EDT...

AT 457 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 5 MILES
NORTHEAST OF BAHAMA...OR ABOUT 11 MILES NORTHWEST OF CREEDMOOR...
MOVING SOUTHEAST AT 5 MPH.

SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...BAHAMA...STEM... AND
BUTNER.

HAZARDS INCLUDE...
GUSTY WINDS UP TO 45 MPH.
DEADLY CLOUD TO GROUND LIGHTNING.
HEAVY RAINFALL AND MINOR FLOODING.

THIS INCLUDES INTERSTATE 85 BETWEEN EXITS 183 AND 191.

WIND GUSTS UP TO 45 MPH ARE CAPABLE OF KNOCKING DOWN TREE LIMBS AND
BLOWING AROUND TRASH CANS...POTTED PLANTS...LAWN FURNITURE AND OTHER
LIGHT OUTDOOR OBJECTS.

HEAVY RAINFALL ASSOCIATED WITH THESE STORMS WILL CAUSE MINOR
FLOODING OF LOW LYING AREAS INCLUDING DITCHES...CREEKS...ROADWAYS
AND AREAS OF POOR DRAINAGE. MOTORISTS SHOULD USE EXTRA CAUTION AND
REDUCE DRIVING SPEEDS TO AVOID HYDROPLANING.

&&

LAT...LON 3620 7856 3607 7867 3608 7874 3605 7875
      3605 7880 3620 7896 3624 7895 3624 7880
      3631 7880
TIME...MOT...LOC 2057Z 315DEG 4KT 3623 7882

VINCENT

Special weather statement, Jul 16, 5:03 PM EDT, 3 hours 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
503 PM EDT MON JUL 16 2012

NCZ009-010-026-162200-
FRANKLIN-VANCE-WARREN-
503 PM EDT MON JUL 16 2012

...STRONG THUNDERSTORMS WILL MOVE ACROSS WARREN...VANCE AND FRANKLIN
COUNTIES THROUGH 600 PM EDT...

AT 501 PM EDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OVER
KITTRELL...OR ABOUT 8 MILES SOUTH OF HENDERSON...MOVING SOUTHEAST AT
5 MPH. ADDITIONAL STRONG THUNDERSTORMS WERE DEVELOPING NORTH OF
HENDERSON IN VANCE COUNTY...AND JUST SOUTH OF OXFORD IN GRANVILLE
COUNTY...MOVING SOUTHEAST AT 5 MPH.

LOCATIONS IN THE PATH OF THESE STORMS INCLUDE INGLESIDE...
LOUISBURG...HENDERSON...AND GILLBURG.

HAZARDS INCLUDE...
GUSTY WINDS UP TO 45 MPH.
DEADLY CLOUD TO GROUND LIGHTNING.
HEAVY RAINFALL AND MINOR FLOODING.

THIS INCLUDES INTERSTATE 85 BETWEEN EXITS 209 AND 223.

WIND GUSTS UP TO 45 MPH ARE CAPABLE OF KNOCKING DOWN TREE LIMBS AND
BLOWING AROUND TRASH CANS...POTTED PLANTS...LAWN FURNITURE AND OTHER
LIGHT OUTDOOR OBJECTS.

HEAVY RAINFALL ASSOCIATED WITH THESE STORMS WILL CAUSE MINOR
FLOODING OF LOW LYING AREAS INCLUDING DITCHES...CREEKS...ROADWAYS
AND AREAS OF POOR DRAINAGE. MOTORISTS SHOULD USE EXTRA CAUTION AND
REDUCE DRIVING SPEEDS TO AVOID HYDROPLANING...ESPECIALLY ON
INTERSTATE 85 BETWEEN EXITS 209 AND 223.

&&

LAT...LON 3636 7792 3629 7794 3611 7807 3596 7838
      3602 7854 3611 7853 3617 7850 3618 7851
      3645 7851 3646 7791
TIME...MOT...LOC 2101Z 321DEG 5KT 3621 7839

VINCENT

Special weather statement, Jul 16, 5:20 PM EDT, 3 hours 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
520 PM EDT MON JUL 16 2012

NCZ078-162145-
WAYNE-
520 PM EDT MON JUL 16 2012

...STRONG THUNDERSTORMS WILL MOVE ACROSS WAYNE COUNTY THROUGH 545 PM
EDT...

AT 518 PM EDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OVER
EUREKA...OR ABOUT 10 MILES NORTHEAST OF GOLDSBORO...MOVING EAST AT 15
MPH.

LOCATIONS IN THE PATH OF THESE STORMS INCLUDE EUREKA...AND OTHER
AREAS NEAR THE WAYNE COUNTY AND GREENE COUNTY BORDER.

HAZARDS INCLUDE...
GUSTY WINDS UP TO 40 MPH.
DEADLY CLOUD TO GROUND LIGHTNING.
HEAVY RAINFALL AND MINOR FLOODING.

WIND GUSTS UP TO 40 MPH ARE CAPABLE OF KNOCKING DOWN SMALL TREE
LIMBS AND BLOWING AROUND TRASH CANS...POTTED PLANTS...LAWN FURNITURE
AND OTHER LIGHT OUTDOOR OBJECTS.

HEAVY RAINFALL ASSOCIATED WITH THESE STORMS WILL CAUSE MINOR
FLOODING OF LOW LYING AREAS INCLUDING DITCHES...CREEKS...ROADWAYS
AND AREAS OF POOR DRAINAGE. MOTORISTS SHOULD USE EXTRA CAUTION AND
REDUCE DRIVING SPEEDS TO AVOID HYDROPLANING.

&&

LAT...LON 3537 7780 3538 7815 3539 7815 3540 7816
      3549 7812 3560 7805 3558 7800 3559 7782
      3542 7782 3541 7780
TIME...MOT...LOC 2118Z 292DEG 11KT 3550 7789

VINCENT

Special weather statement, Jul 16, 5:24 PM EDT, 3 hours 18 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Special weather statement, Jul 16, 7:26 PM EDT, 1 hour 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
726 PM EDT MON JUL 16 2012

NCZ023-024-170015-
ALAMANCE-ORANGE-
726 PM EDT MON JUL 16 2012

...STRONG THUNDERSTORMS WILL MOVE ACROSS NORTHERN ORANGE AND
ALAMANCE COUNTIES THROUGH 815 PM EDT...

AT 724 PM EDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS 7 MILES
NORTHWEST OF CARR...OR ABOUT 5 MILES EAST OF JERICHO...MOVING
SOUTHEAST AT 15 MPH.

LOCATIONS IN THE PATH OF THESE STORMS INCLUDE PLEASANT GROVE...
CARR...UNION RIDGE...AND OTHER AREAS NORTH OF INTERSTATE 40 IN
NORTHERN ORANGE AND ALAMANCE COUNTIES.

HAZARDS INCLUDE...
GUSTY WINDS UP TO 40 MPH.
HEAVY RAINFALL AND MINOR FLOODING.

THIS INCLUDES INTERSTATE 40 BETWEEN EXITS 140 AND 263.

WIND GUSTS UP TO 40 MPH ARE CAPABLE OF KNOCKING DOWN SMALL TREE
LIMBS AND BLOWING AROUND TRASH CANS...POTTED PLANTS...LAWN FURNITURE
AND OTHER LIGHT OUTDOOR OBJECTS.

HEAVY RAINFALL ASSOCIATED WITH THESE STORMS WILL CAUSE PONDING OF
WATER ON ROADWAYS. MOTORISTS SHOULD USE EXTRA CAUTION AND REDUCE
DRIVING SPEEDS TO AVOID HYDROPLANING IN NORTHERN ORANGE AND NORTHERN
ALAMANCE COUNTIES.

&&

LAT...LON 3624 7895 3620 7895 3620 7896 3614 7896
      3597 7900 3598 7954 3625 7953 3625 7939
TIME...MOT...LOC 2324Z 329DEG 14KT 3629 7927

VINCENT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 9:17 PM EDT	Severe Thunderstorm Warning	RAH	Davidson	34 min
Jul 17, 3:46 PM EDT	Special Weather Statement	RAH	Franklin	59 min
Jul 17, 4:17 PM EDT	Special Weather Statement	RAH	Stanly	58 min
Jul 17, 4:37 PM EDT	Special Weather Statement	RAH	Hoke, Scotland	53 min
Jul 17, 5:40 PM EDT	Special Weather Statement	RAH	Richmond	65 min
Jul 17, 6:17 PM EDT	Special Weather Statement	RAH	Scotland	58 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2012 Every severe thunderstorm warning in 2012

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.