Alert archive / North Carolina / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 108, NWS Raleigh, NC
NWS Raleigh, NC issued this severe thunderstorm warning at Aug 5, 2005, 5:18 PM EDT for Orange County, North Carolina. It was in force for 27 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, 2005, 5:18 PM EDT (21:18 UTC)
- Expired
- Aug 5, 2005, 5:45 PM EDT
- In force
- 27 min
- Issued by
- NWS Raleigh, NC
- Area
- Counties, with a storm outline in the text
County Orange County, NC
The radar
The Raleigh/Durham radar (KRAX), 72 km from the middle of the area, began a volume at 21:19 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, 9.3 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
- 1463 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 1227 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- -9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, 2:45 PM EDT, 2 hours 33 minutes earlier.
Area forecast discussion, Aug 5, 2:45 PM EDT, 2 hours 33 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RALEIGH NC 245 PM EDT FRI AUG 5 2005 .SHORT TERM (TONIGHT THROUGH MONDAY)... THROUGH TONIGHT: ISOLATED TO SCATTERED STORMS THAT FORMED WITHIN VERY WEAK LOW LEVEL CONVERGENCE ZONES SHOULD DIMINISH IN COVERAGE AND INTENSITY SHORTLY AFTER SUNSET. WILL CONTINUE 20-30% POPS THROUGH MID EVENING... THEN WILL CLEAR OUT SKIES BRIEFLY BEFORE PATCHY STRATUS AND FOG ARE EXPECTED TO DEVELOP... AS SUGGESTED BY FORECAST SOUNDINGS AND PERSISTENCE. FORECAST LOWS OF 69-73 REASONABLE. SAT-MON: OVERALL PATTERN IS FAIRLY STAGNANT THROUGH THIS PERIOD WITH A BAGGY UPPER LOW OVER THE GULF COAST REGION DRIFTING SLOWLY WESTWARD... & THE PREVAILING WESTERLIES HOLDING WELL TO OUR NORTH... KEEPING NC BENEATH A WEAK UPPER LEVEL SHEAR AXIS & AT THE MERCY OF HARD-TO-DETECT LOW LEVEL FORCING FEATURES TO FOCUS CONVECTION WITH DAYTIME DESTABILIZATION. THE SURFACE FRONT APPROACHING FROM THE NORTHWEST SHOULD STALL TO OUR NORTH EARLY IN THE WEEKEND BEFORE WASHING OUT. OFFSHORE ANTICYCLONE SHOULD PRODUCE A PREVAILING SOUTHEAST TO SOUTH WIND FLOW THROUGH THE LOW LEVELS... CAUSING A SLIGHT UPTICK IN MOISTURE THROUGH THE COLUMN AS WIND FIELDS ALOFT REMAIN WEAK. IN GENERAL... SEE NO REASON TO DEPART FROM THE PERSISTENCE OF THE LAST TWO DAYS WITH SMALL (1 IN 4) CHANCES OF SHOWERS AND STORMS PRIMARILY EACH AFTERNOON AND EVENING. WE SHOULD SEE AREAS OF FOG AND STRATUS AGAIN SAT NIGHT. ONLY MINOR CHANGES ARE NEEDED TO FORECAST MAX/MIN TEMPS WITH INCREASED CLOUD COVER PROGRESSIVELY TRIMMING HIGHS A BIT EACH DAY. && .LONG TERM (TUESDAY THROUGH FRIDAY)... CONFLUENCE ZONE BETWEEN BERMUDA HIGH JUST OFF THE MID-ATLANTIC COAST AND UPPER CYCLONIC CIRCULATION OVER THE LOWER MISSISSIPPI WILL PROVIDE AN INFLUX OF GULF MOISTURE INTO REGION. PWS WATER REMAIN AOA 2.0 AS THE CYCLONIC CIRCULATION CENTER LIFTS SLOWLY NORTH IN THE TN VALLEY IN RESPONSE TO PASSING NORTHERN STREAM S/W TROUGH. A DIURNAL LOW CHANCE TREND IN POPS WILL BE FEATURED THROUGH THE PERIOD. HOWEVER...IF THE S/W TROUGH ACTUALLY LIFTS NORTH ACROSS THE CENTRAL APPALACHIANS HIGH CHANCE POPS TO LIKELY WILL BE JUSTIFIED BY MID-WEEK. CLOUD COVER AND RAIN CHANCES WILL MITIGATE MAXIMUM TEMPERATURES TO NORMAL RANGES WITH LOWS 70-75. && .AVIATION... ISOLATED TO SCATTERED THUNDER THIS EVENING ACROSS TAF FORECAST AREA THROUGH 00Z. DEVELOPMENT OF SE LOW-LEVEL MARINE LAYER MAY INTRODUCE IFR/LIFR CEILINGS TO GO ALONG WITH THE MVFR VISIBILITIES THAT HAVE OBSERVED THE PAST SEVERAL MORNINGS. SCATTERED THUNDER AGAIN TOMORROW AFTERNOON WITH AFTERNOON HEATING AND PRE-FRONTAL TROUGH. && .RAH WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...HARTFIELD LONG TERM/AVIATION...LOCKLEAR
Hazardous weather outlook, Aug 5, 5:30 AM EDT, 11 hours 48 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RALEIGH NC 530 AM EDT FRI AUG 5 2005 NCZ007>011-021>028-038>043-073>078-083>086-088-089-060930- 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- 530 AM EDT FRI AUG 5 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL NORTH CAROLINA. .DAY ONE...TODAY AND TONIGHT LATE AFTERNOON THUNDERSTORMS WILL DEVELOP TODAY. SOME HAIL IS EXPECTED AND WILL APPROACH SEVERE LIMITS IN ISOLATED LOCATIONS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
In the hours before
Special weather statement, Aug 5, 1:22 PM EDT, 3 hours 56 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RALEIGH NC 122 PM EDT FRI AUG 5 2005 NCZ041-051830- WAKE- INCLUDING THE CITY OF...RALEIGH 122 PM EDT FRI AUG 5 2005 STRONG STORMS WILL CONTINUE TO DEVELOP OVER NORTH AND WEST RALEIGH AND CARY THROUGH 215 PM. FREQUENT LIGHTNING AND VERY HEAVY RAINFALL CAN BE EXPECTED WITH THIS STORM... SO ANYONE OUTDOORS SHOULD MOVE INTO A SAFE SHELTER IMMEDIATELY. REMEMBER THAT IF YOU CAN HEAR THUNDER... YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. HAIL UP TO THE SIZE OF MARBLES AND WIND GUSTS OVER 35 MPH ARE POSSIBLE WITH THESE STORMS. GIH
Special weather statement, Aug 5, 4:15 PM EDT, 1 hour 3 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RALEIGH NC 415 PM EDT FRI AUG 5 2005 NCZ073-083>086-052115- ANSON-HOKE-RICHMOND-SCOTLAND-STANLY-MOORE 415 PM EDT FRI AUG 5 2005 ...STRONG THUNDERSTORMS WILL MOVE SOUTH AT 10 MPH ACROSS RICHMOND...STANLY...ANSON... MOORE...HOKE AND SCOTLAND COUNTIES THROUGH 515 PM EDT... AT 415 PM EDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OVER PORTIONS OF THE WESTERN SANDHILLS AND THE SOUTHERN PIEDMONT OF NORTH CAROLINA. THE STRONGEST STORM WILL MOVE FROM NEAR MASTON SOUTH ALONG STATE ROUTE 177 AND U.S. HIGHWAY 1 TO NEAR HAMLET AND ROCKINGHAM IN RICHMOND COUNTY... THROUGH 500 PM. GUSTY WINDS OF 30 TO 40 MPH... HAIL UP TO THE SIZE OF MARBLES... AND INTENSE CLOUD-TO-GROUND LIGHTNING CAN BE EXPECTED WITH THESE THUNDERSTORMS. MWS
Special weather statement, Aug 5, 4:51 PM EDT, 27 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RALEIGH NC 451 PM EDT FRI AUG 5 2005 NCZ024-052145- ORANGE- 451 PM EDT FRI AUG 5 2005 ...STRONG THUNDERSTORM WILL MOVE ACROSS ORANGE COUNTY THROUGH 545 PM EDT... AT 451 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER INTERSTATE 85 IN EXTREME EASTERN ORANGE COUNTY... ABOUT 9 MILES NORTH OF CHAPEL HILL. THE STORM WILL DRIFT SOUTH SOUTHWEST AROUND 10 MPH... AND WILL MOVE ACROSS INTERSTATE 40 EAST OF HILLSBOROUGH... BETWEEN 510 AND 530 PM. GUSTY WINDS TO 40 MPH... INTENSE CLOUD-TO-GROUND LIGHTNING... AND HAIL UP TO THE SIZE OF MARBLES CAN BE EXPECTED WITH THIS STORM. MWS
Local storm report, Aug 5, 5:18 PM EDT, 0 minutes before
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Severe Thunderstorm Warnings in North Carolina, 2005Every severe thunderstorm warning in 2005
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.