Alert archive / North Carolina / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 199, NWS Raleigh, NC
NWS Raleigh, NC issued this severe thunderstorm warning at Aug 5, 2010, 3:27 PM EDT for Orange County, North Carolina. It was in force for 32 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
- Aug 5, 2010, 3:27 PM EDT (19:27 UTC)
- Expired
- Aug 5, 2010, 3:59 PM EDT
- In force
- 32 min
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
County Orange County, NC
The radar
The Raleigh/Durham radar (KRAX), 72 km from the middle of the area, began a volume at 19:26 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, 7.5 hours before the alert went out and 70 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.
- Mixed-layer CAPE
- 2373 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 930 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
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 Aug 5, 3:25 PM EDT, 2 minutes earlier.
Area forecast discussion, Aug 5, 3:25 PM EDT, 2 minutes before
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</html>Hazardous weather outlook, Aug 5, 12:26 PM EDT, 3 hours 1 minute before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RALEIGH NC 1226 PM EDT THU AUG 5 2010 NCZ007-021-038-061630- PERSON-FORSYTH-DAVIDSON- 1226 PM EDT THU AUG 5 2010 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA. .DAY ONE...THIS AFTERNOON AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. HEAT ADVISORY. ALSO...THERE IS A RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING...WITH A PRIMARY THREAT OF DAMAGING WIND GUSTS AND FREQUENT TO EXCESSIVE LIGHTNING. SEVERE STRAIGHT LINE WINDS CAN CAUSE AS MUCH DAMAGE AS TORNADOES. WHEN SEVERE WINDS STRIKE... TAKE COVER IN AN INTERIOR BATHROOM... CLOSET... OR HALLWAY ON THE LOWEST FLOOR. EVERY THUNDERSTORM PRODUCES DEADLY LIGHTNING...AND NO PLACE OUTSIDE IS SAFE. LIGHTNING CAN STRIKE 20 MILES AWAY FROM A STORM. IF SOMEONE IS STRUCK BY LIGHTNING... SEEK MEDICAL CARE IMMEDIATELY. LIGHTNING STRIKES CAN RESULT IN CARDIAC ARREST... AND QUICK RESPONSE IS VITAL. WHEN THUNDER ROARS... GO INDOORS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. SEVERE STORMS ARE POSSIBLE AGAIN ON FRIDAY AFTERNOON AS A COLD FRONT APPROACHES FROM THE NORTHWEST. NCZ008>011-022>028-039>043-073>078-083>086-088-089-061630- GRANVILLE-VANCE-WARREN-HALIFAX-GUILFORD-ALAMANCE-ORANGE-DURHAM- FRANKLIN-NASH-EDGECOMBE-RANDOLPH-CHATHAM-WAKE-JOHNSTON-WILSON-STANLY- MONTGOMERY-MOORE-LEE-HARNETT-WAYNE-ANSON-RICHMOND-SCOTLAND-HOKE- CUMBERLAND-SAMPSON- 1226 PM EDT THU AUG 5 2010 ...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NORTH CAROLINA. .DAY ONE...THIS AFTERNOON AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. HEAT ADVISORY. ALSO...THERE IS A RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING...WITH A PRIMARY THREAT OF DAMAGING WIND GUSTS AND FREQUENT TO EXCESSIVE LIGHTNING.. SEVERE STRAIGHT LINE WINDS CAN CAUSE AS MUCH DAMAGE AS TORNADOES. WHEN SEVERE WINDS STRIKE... TAKE COVER IN AN INTERIOR BATHROOM... CLOSET... OR HALLWAY ON THE LOWEST FLOOR. EVERY THUNDERSTORM PRODUCES DEADLY LIGHTNING...AND NO PLACE OUTSIDE IS SAFE. LIGHTNING CAN STRIKE 20 MILES AWAY FROM A STORM. IF SOMEONE IS STRUCK BY LIGHTNING... SEEK MEDICAL CARE IMMEDIATELY. LIGHTNING STRIKES CAN RESULT IN CARDIAC ARREST... AND QUICK RESPONSE IS VITAL. WHEN THUNDER ROARS... GO INDOORS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. SEVERE STORMS ARE POSSIBLE AGAIN ON FRIDAY AFTERNOON AND EVENING AS A COLD FRONT APPROACHES FROM THE NORTHWEST.
In the hours before
Special weather statement, Aug 5, 2:22 PM EDT, 1 hour 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
222 PM EDT THU AUG 5 2010
NCZ021-022-038-051955-
DAVIDSON-FORSYTH-GUILFORD-
222 PM EDT THU AUG 5 2010
...STRONG THUNDERSTORMS WILL MOVE INTO FORSYTH...GUILFORD AND
DAVIDSON COUNTIES FROM THE NORTHWEST BETWEEN 300 PM AND 400 PM...
AT 217 PM EDT...DOPPLER RADAR INDICATED A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM 15 MILES SOUTHWEST OF
MOUNT AIRY TO 35 MILES WEST OF MOCKSVILLE...MOVING EAST AT 20 MPH.
THESE STORMS ARE PRODUCING STRONG WIND GUSTS AND EXTREMELY FREQUENT
DANGEROUS LIGHTNING... AND WILL MOVE INTO THE TRIAD REGION...
INCLUDING INTERSTATES 40 AND 85... AFTER 300 PM.
LOCATIONS IN THE PATH OF THESE STORMS INCLUDE... LEWISVILLE...
CLEMMONS... WINSTON-SALEM... LEXINGTON... STOKESDALE... AND
GREENSBORO.
HAZARDS INCLUDE...
GUSTY WINDS OF 40 TO 50 MPH.
PEA SIZE HAIL.
THESE THUNDERSTORMS ARE PRODUCING AN EXCESSIVE AMOUNT OF LIGHTNING.
SEEK SHELTER INDOORS AND STAY AWAY FROM THE WINDOWS. MANY LIGHTNING
STRIKES WILL OCCUR WELL AHEAD OF THE HEAVY RAIN AND GUSTY WINDS. IF
YOU CANNOT SEEK SHELTER INDOORS TAKE COVER IN A VEHICLE.
TORRENTIAL DOWNPOURS WITH THESE STORMS WILL MAKE DRIVING DIFFICULT.
USE EXTREME CAUTION AND SLOW DOWN IN HEAVY RAIN.
&&
LAT...LON 3612 8045 3626 8046 3624 7967 3602 7976
3591 8004 3586 8005 3555 8019 3555 8021
3569 8033 3571 8033 3571 8038 3574 8046
3583 8049 3584 8040 3589 8041 3590 8037
3596 8038 3607 8052 3609 8052
TIME...MOT...LOC 1817Z 274DEG 19KT 3639 8087 3593 8115
GIHSpecial weather statement, Aug 5, 2:40 PM EDT, 47 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
240 PM EDT THU AUG 5 2010
NCZ022>024-039-040-051945-
ALAMANCE-CHATHAM-GUILFORD-ORANGE-RANDOLPH-
240 PM EDT THU AUG 5 2010
...A STRONG THUNDERSTORM WILL MOVE ACROSS PARTS OF GUILFORD...
ALAMANCE...ORANGE...RANDOLPH AND CHATHAM COUNTIES THROUGH 345 PM
EDT...
AT 239 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
LIBERTY...OR ABOUT 10 MILES EAST OF RANDLEMAN...MOVING NORTHEAST AT
30 MPH.
SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
ALAMANCE...SWEPSONVILLE...GRAHAM...HAW RIVER...AND MEBANE.
HAZARDS INCLUDE...
PEA SIZE HAIL.
GUSTY WINDS OF 30 TO 40 MPH.
OCCASIONAL LIGHTNING.
IF A THUNDERSTORM MOVES NEARBY OR OVERHEAD...SEEK SAFE SHELTER IN A
NEARLY BUILDING OR VEHICLE. STRONG WINDS ARE CAPABLE OF KNOCKING
DOWN BLOWING AROUND LIGHT OBJECTS LEFT OUTDOORS. BRIEFLY HEAVY RAIN
WILL CAUSE PONDING OF WATER ON ROADS AND POOR VISIBILITY.
&&
LAT...LON 3624 7949 3623 7924 3576 7926 3561 7968
3582 7987
TIME...MOT...LOC 1839Z 229DEG 27KT 3588 7960
DJFThe office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 10:13 PM EDT | Special Weather Statement | RAH | Granville, Person, Vance, Warren | 77 min |
| Aug 4, 10:26 PM EDT | Severe Thunderstorm Warning | RAH | Granville, Halifax, Vance, Warren | 40 min |
| Aug 4, 11:03 PM EDT | Special Weather Statement | RAH | Franklin, Halifax, Nash | 57 min |
| Aug 4, 11:28 PM EDT | Special Weather Statement | RAH | Durham, Orange | 62 min |
| Aug 4, 11:47 PM EDT | Areal Flood Advisory | RAH | Halifax | 103 min |
| Aug 5, 12:09 AM EDT | Special Weather Statement | RAH | Edgecombe, Nash, Wilson | 66 min |
| Aug 5, 12:16 AM EDT | Severe Thunderstorm Warning | RAH | Durham, Wake | 44 min |
| Aug 5, 12:38 AM EDT | Severe Thunderstorm Warning | RAH | Johnston, Wake | 52 min |
| Aug 5, 12:52 AM EDT | Special Weather Statement | RAH | Wake | 38 min |
| Aug 5, 1:15 AM EDT | Areal Flood Advisory | RAH | Wake | 3 hr |
| Aug 5, 1:16 AM EDT | Special Weather Statement | RAH | Wayne, Wilson | 59 min |
| Aug 5, 1:43 AM EDT | Special Weather Statement | RAH | Wake | 62 min |
| Aug 5, 2:14 AM EDT | Areal Flood Advisory | RAH | Wake | 106 min |
| Aug 5, 2:22 AM EDT | Special Weather Statement | RAH | Harnett, Wayne | 53 min |
| Aug 5, 2:40 AM EDT | Severe Thunderstorm Warning | RAH | Johnston | 50 min |
| Aug 5, 3:24 AM EDT | Areal Flood Advisory | RAH | Johnston | 96 min |
| Aug 5, 4:15 AM EDT | Special Weather Statement | RAH | Sampson | 90 min |
| Aug 5, 2:22 PM EDT | Special Weather Statement | RAH | Davidson, Forsyth, Guilford | 93 min |
| Aug 5, 2:40 PM EDT | Special Weather Statement | RAH | Alamance | 65 min |
| Aug 5, 3:03 PM EDT | Severe Thunderstorm Warning | RAH | Alamance | 57 min |
| Aug 5, 4:18 PM EDT | Severe Thunderstorm Warning | RAH | Davidson | 57 min |
| Aug 5, 4:22 PM EDT | Special Weather Statement | RAH | Forsyth | 53 min |
| Aug 5, 4:40 PM EDT | Special Weather Statement | RAH | Alamance | 35 min |
| Aug 5, 4:50 PM EDT | Severe Thunderstorm Warning | RAH | Davidson, Forsyth, Guilford | 40 min |
| Aug 5, 5:03 PM EDT | Severe Thunderstorm Warning | RAH | Person | 57 min |
| Aug 5, 5:13 PM EDT | Severe Thunderstorm Warning | RAH | Davidson, Randolph | 47 min |
| Aug 5, 5:28 PM EDT | Severe Thunderstorm Warning | RAH | Granville | 50 min |
| Aug 5, 5:30 PM EDT | Severe Thunderstorm Warning | RAH | Guilford | 43 min |
| Aug 5, 5:45 PM EDT | Special Weather Statement | RAH | Montgomery, Randolph, Stanly | 60 min |
| Aug 5, 5:47 PM EDT | Severe Thunderstorm Warning | RAH | Alamance, Orange | 58 min |
| Aug 5, 6:01 PM EDT | Special Weather Statement | RAH | Vance | 59 min |
| Aug 5, 6:06 PM EDT | Severe Thunderstorm Warning | RAH | Alamance, Orange | 39 min |
| Aug 5, 6:40 PM EDT | Severe Thunderstorm Warning | RAH | Durham, Granville, Orange | 50 min |
| Aug 5, 6:56 PM EDT | Special Weather Statement | RAH | Franklin, Halifax, Nash | 64 min |
| Aug 5, 7:13 PM EDT | Severe Thunderstorm Warning | RAH | Wake | 47 min |
| Aug 5, 7:19 PM EDT | Special Weather Statement | RAH | Cumberland, Harnett, Hoke, Johnston, Lee, Richmond and 1 more | 56 min |
| Aug 5, 7:31 PM EDT | Severe Thunderstorm Warning | RAH | Edgecombe, Halifax, Nash, Wilson | 59 min |
| Aug 5, 7:40 PM EDT | Areal Flood Advisory | RAH | Anson, Richmond | 110 min |
| Aug 5, 7:42 PM EDT | Areal Flood Advisory | RAH | Wake | 108 min |
| Aug 5, 7:47 PM EDT | Areal Flood Advisory | RAH | Franklin | 103 min |
| Aug 5, 7:54 PM EDT | Flash Flood Warning | RAH | Wake | 111 min |
Nearby
Severe Thunderstorm Warnings in North Carolina, 2010Every severe thunderstorm warning in 2010
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.