Alert archive / North Carolina / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 105, NWS Raleigh, NC

July 4, 2002Orange County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Jul 4, 2002, 5:40 PM EDT for Orange County, North Carolina. It was in force for 20 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 4, 2002, 5:40 PM EDT (21:40 UTC)
Expired: Jul 4, 2002, 6:00 PM EDT
In force: 20 min
Issued by: NWS Raleigh, NC
Area: Whole counties

County Orange County, NC

What was reported inside it

Time	Report	Where	Remark
Jul 4, 5:50 PM EDT	Thunderstorm Wind 50 E	Orange Grove, NC	Trees were blown down, one fell onto a house.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 9.7 hours before the alert went out and 131 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: 812 J/kg
Mixed-layer CIN: -140 J/kg
Mixed-layer LCL: 1004 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

454 
WUUS52 KRAH 042140
SVRRAH
NCC135-042200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
538 PM EDT THU JUL 4 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ORANGE COUNTY IN NORTH CAROLINA

* UNTIL 600 PM EDT

* AT 538 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES SOUTH OF HILLSBOROUGH...OR ABOUT 6   
MILES NORTHWEST OF CHAPEL HILL...MOVING SOUTHWEST ABOUT 15 MPH.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE 
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY 
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY 
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

$$

RA

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 4, 2:20 PM EDT, 3 hours 20 minutes earlier.

Area forecast discussion, Jul 4, 2:20 PM EDT, 3 hours 20 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RALEIGH NC
220 PM EDT THU JUL 4 2002

PERSISTENCE FORECAST FOR FRIDAY.
HEAT ADVISORY IS A FIRST PERIOD FORECAST PRODUCT SO WILL DEFER TO
THE MIDNIGHT SHIFT FOR FRIDAY HEAT.

MODELS ARE AGAIN ALL OVER THE PLACE IN THE DETAILS. AVIATION TAKES
MCC VORTICITY OVER NORTH DAKOTA CURRENTLY AND DRIVES IT TO OUR NORTH
BORDER BY SUNRISE SATURDAY. ETA DEVELOPS SURFACE LOW AND DEEPENS IT
AS IT RETROGRADES SOUTHWEST FRIDAY. IN COMBINATION WITH ALLEGED
EXPLOSION OF DIVERGENCE AT 200 MB 00Z SATURDAY...ETA READY TO SUCK
THE WORMS OUT OF THE GROUND WITH LIFT. NGM TAKES SURFACE LIFT 00Z
SATURDAY MORE TO COAST WITH UPPER DIVERGENCE OVER ASHEVILLE. MODELS
WILL BE TRASHED FOR PERSISTENCE FRIDAY.

WITH ETA SURFACE LOW TIGHTENING GRADIENT LATE FRIDAY IT IS FASTER
PULLING THE COOL AIR IN FRIDAY NIGHT. FAVOR SLOWER NGM FOR NOW BUT
COOLER AIR WILL STILL BEGIN TO REACH TO SOUTH BORDER BEFORE SUNRISE
SATURDAY.

LOWS TONIGHT UP SLIGHTLY FROM THIS MORNING. A DIP SATURDAY
MORNING...MORE PRONOUNCED TO THE NORTH.

IN THE EXTENDED...A SLOW WARMING TREND INTO THE EARLY WORK WEEK AND
WILL ADD TINY CHANCE FOR AFTERNOON THUNDERSTORMS TO TUESDAY. STRONG
FRONT FOR THIS TIME OF YEAR FORECAST WEDNESDAY. THIS WILL LIKELY BE
TOO EARLY AND TOO COOL WHEN/IF IT DOES ARRIVE. WILL STAY ON THE WARM
SIDE AND CONTINUE TO CONFINE RAIN CHANCES TO THE AFTERNOON INTO
THURSDAY.

.RAH...NONE...

RLH

In the hours before

Local storm report, Jul 4, 11:41 AM EDT, 5 hours 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH, NC
1141 AM EDT THU JUL 4 2002

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0415 PM     WESTERN WINSTON SALEM    NC   1.00 INCH HAIL
07/03/02   FORSYTH

Local storm report, Jul 4, 12:32 PM EDT, 5 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH, NC
1232 PM EDT THU JUL 4 2002

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0400 PM    WESTERN WINSTON SALEM     NC   WIND DAMAGE
07/03/02   FORSYTH                        ON MEADOWLARK ROAD IN
                                          WESTERN WINSTON
                                          SALEM---TREE BLOWN DOWN ON
                                          A HOUSE , NUMEROUS BRANCHES
                                          SNAPPED OFF AND IN THE
                                          YARDS, BASKETBALL POLE
                                          SNAPPED AND A SMALL TRACTOR
                                          OVERTURNED.

Local storm report, Jul 4, 3:43 PM EDT, 1 hour 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH, NC
343 PM EDT THU JUL 4 2002

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0340 PM    NORTHWEST GREENSBORO      NC   .75 INCH HAIL
07/04/02   GUILFORD

Local storm report, Jul 4, 3:50 PM EDT, 1 hour 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH, NC
350 PM EDT THU JUL 4 2002

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0340 PM    NORTHWEST GREENSBORO      NC   .75 INCH HAIL
07/04/02   GUILFORD

0350 PM    GREENSBORO                NC   .75 INCH HAIL
07/04/02   GUILFORD                       I-40 AND WENDOVER AV

Local storm report, Jul 4, 5:22 PM EDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH, NC
522 PM EDT THU JUL 4 2002

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0405 PM    GREENSBORO                NC   .75 INCH HAIL
07/04/02   GUILFORD

0410 PM    NORTHWEST GREENSBORO      NC   WIND DAMAGE
07/04/02   GUILFORD                       TREES DOWN ON BUNCH ROAD
                                          AND ON STANLEYVILLE ROAD.

DGS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 8:59 PM EDT	Severe Thunderstorm Warning	RAH	Warren	31 min
Jul 4, 3:35 PM EDT	Severe Thunderstorm Warning	RAH	Guilford	25 min
Jul 4, 4:04 PM EDT	Severe Thunderstorm Warning	RAH	Guilford	26 min
Jul 4, 4:08 PM EDT	Severe Thunderstorm Warning	RAH	Johnston	22 min
Jul 4, 4:48 PM EDT	Severe Thunderstorm Warning	RAH	Edgecombe	27 min
Jul 4, 6:24 PM EDT	Severe Thunderstorm Warning	RAH	Nash	36 min
Jul 4, 6:26 PM EDT	Severe Thunderstorm Warning	RAH	Nash	34 min
Jul 4, 6:34 PM EDT	Severe Thunderstorm Warning	RAH	Montgomery	26 min
Jul 4, 6:48 PM EDT	Severe Thunderstorm Warning	RAH	Moore	27 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.