Alert archive / North Carolina / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 106, NWS Raleigh, NC

July 27, 20134 counties in North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Jul 27, 2013, 2:10 PM EDT for 4 counties in North Carolina. 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: Jul 27, 2013, 2:10 PM EDT (18:10 UTC)
Expired: Jul 27, 2013, 3:00 PM EDT
In force: 50 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

Counties Davidson County, NC, Montgomery County, NC, Randolph County, NC, Stanly County, NC

The radar

The Raleigh/Durham radar (KRAX), 141 km from the middle of the area, began a volume at 18:12 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 12:00Z, 6.2 hours before the alert went out and 62 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: 408 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 654 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 27, 1:35 PM EDT, 35 minutes earlier.

Area forecast discussion, Jul 27, 1:35 PM EDT, 35 minutes before

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Hazardous weather outlook, Jul 27, 4:05 AM EDT, 10 hours 5 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RALEIGH NC
405 AM EDT SAT JUL 27 2013

NCZ007-008-021>025-038>041-073>077-083>086-088-280815-
PERSON-GRANVILLE-FORSYTH-GUILFORD-ALAMANCE-ORANGE-DURHAM-DAVIDSON-
RANDOLPH-CHATHAM-WAKE-STANLY-MONTGOMERY-MOORE-LEE-HARNETT-ANSON-
RICHMOND-SCOTLAND-HOKE-CUMBERLAND-
405 AM EDT SAT JUL 27 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON
THROUGH LATE THIS EVENING ACROSS THE WESTERN PIEDMONT. AN ISOLATED
STORM COULD BECOME SEVERE...WITH A PRIMARY THREAT OF DAMAGING
WINDS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP SUNDAY AFTERNOON
AND EVENING AS A WEAK COLD FRONT APPROACHES THE MOUNTAINS FROM THE
WEST. A FEW STORMS COULD BECOME SEVERE...WITH A PRIMARY THREAT OF
DAMAGING WINDS AND QUARTER SIZE HAIL.

NCZ009>011-026>028-042-043-078-089-280815-
VANCE-WARREN-HALIFAX-FRANKLIN-NASH-EDGECOMBE-JOHNSTON-WILSON-WAYNE-
SAMPSON-
405 AM EDT SAT JUL 27 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

VINCENT

In the hours before

Special weather statement, Jul 27, 12:42 PM EDT, 1 hour 28 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
1242 PM EDT SAT JUL 27 2013

NCZ021-038-271745-
DAVIDSON-FORSYTH-
1242 PM EDT SAT JUL 27 2013

...A STRONG THUNDERSTORM WILL MOVE ACROSS FORSYTH AND DAVIDSON
COUNTIES THROUGH 145 PM EDT...

AT 1242 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 6
MILES SOUTHWEST OF CLEMMONS...OR ABOUT 7 MILES NORTHEAST OF
MOCKSVILLE...MOVING NORTHEAST AT 25 MPH.

SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...CLEMMONS...AND...
ARCADIA...LEWISVILLE...AND...MIDWAY...WINSTON-SALEM...PFAFFTOWN...
STANLEYVILLE...AND...SEDGE GARDEN...WALKERTOWN.

HAZARDS INCLUDE...
GUSTY WINDS OF 40 TO 50 MPH.
HEAVY RAINFALL AND MINOR FLOODING.

SEEK SHELTER IN A NEARBY BUILDING OR VEHICLE. WIND GUSTS AS HIGH AS
50 MPH ARE CAPABLE OF KNOCKING DOWN SMALL OR WEAKENED TREES AND
BLOWING AROUND TRASH CANS...POTTED PLANTS...LAWN FURNITURE AND OTHER
LIGHT OUTDOOR OBJECTS. LOCALLY HEAVY RAIN WILL QUICKLY REDUCE
VISIBILITY AND RESULT IN PONDING OF WATER ON ROADWAYS. DRIVERS ARE
URGED TO SLOW DOWN AND USE EXTRA CAUTION TO AVOID HYDROPLANING.

&&

LAT...LON 3627 8034 3626 8011 3618 8004 3605 8004
      3590 8037 3591 8038 3588 8042 3589 8042
      3592 8037 3596 8038 3599 8043 3601 8042
      3606 8047 3604 8048 3604 8050
TIME...MOT...LOC 1642Z 224DEG 22KT 3597 8042

KRR

Local storm report, Jul 27, 12:50 PM EDT, 1 hour 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
1250 PM EDT SAT JUL 27 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1150 AM     TSTM WND DMG     CLEMMONS                36.02N  80.39W
07/27/2013                   FORSYTH            NC   911 CALL CENTER

            TWO TREES DOWN IN THE CLEMMONS AREA

&&

EVENT NUMBER RAH1300869

KRR

Local storm report, Jul 27, 1:18 PM EDT, 52 minutes before

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Local storm report, Jul 27, 1:22 PM EDT, 48 minutes before

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Local storm report, Jul 27, 1:25 PM EDT, 45 minutes before

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Special weather statement, Jul 27, 1:43 PM EDT, 27 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 9:29 AM EDT	Areal Flood Advisory	RAH	Forsyth	3 hr
Jul 27, 12:10 PM EDT	Special Weather Statement	RAH	Forsyth	65 min
Jul 27, 12:31 PM EDT	Areal Flood Advisory	RAH	Forsyth	3 hr
Jul 27, 12:42 PM EDT	Special Weather Statement	RAH	Forsyth	63 min
Jul 27, 12:51 PM EDT	Flash Flood Warning	RAH	Forsyth	3 hr
Jul 27, 1:06 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Forsyth	54 min
Jul 27, 1:43 PM EDT	Special Weather Statement	RAH	Anson, Davidson, Guilford, Stanly	47 min
Jul 27, 2:29 PM EDT	Special Weather Statement	RAH	Anson, Guilford, Montgomery, Randolph, Richmond	61 min
Jul 27, 2:52 PM EDT	Areal Flood Advisory	RAH	Guilford, Randolph	3 hr
Jul 27, 3:16 PM EDT	Special Weather Statement	RAH	Alamance	59 min
Jul 27, 3:30 PM EDT	Special Weather Statement	RAH	Chatham	60 min
Jul 27, 3:36 PM EDT	Special Weather Statement	RAH	Montgomery	54 min
Jul 27, 3:52 PM EDT	Special Weather Statement	RAH	Richmond	38 min
Jul 27, 4:05 PM EDT	Special Weather Statement	RAH	Orange	55 min
Jul 27, 4:06 PM EDT	Special Weather Statement	RAH	Richmond	39 min
Jul 27, 4:22 PM EDT	Special Weather Statement	RAH	Moore	53 min
Jul 27, 4:27 PM EDT	Severe Thunderstorm Warning	RAH	Moore	48 min
Jul 27, 4:33 PM EDT	Special Weather Statement	RAH	Person	27 min
Jul 27, 4:42 PM EDT	Severe Thunderstorm Warning	RAH	Moore, Richmond	48 min
Jul 27, 4:59 PM EDT	Special Weather Statement	RAH	Person	46 min
Jul 27, 7:04 PM EDT	Special Weather Statement	RAH	Warren	56 min
Jul 27, 7:15 PM EDT	Special Weather Statement	RAH	Johnston, Wake	60 min
Jul 27, 7:47 PM EDT	Special Weather Statement	RAH	Johnston, Wilson	58 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2013 Every 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.