Alert archive / North Carolina / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 20, NWS Raleigh, NC
NWS Raleigh, NC issued this severe thunderstorm warning at May 1, 1990, 7:43 PM EDT for Chatham County, Durham County, Orange County, North Carolina. It was in force for 37 min. 2 reports 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
- May 1, 1990, 7:43 PM EDT (23:43 UTC)
- Expired
- May 1, 1990, 8:20 PM EDT
- In force
- 37 min
- Issued by
- NWS Raleigh, NC
- Area
- Whole counties
Counties Chatham County, NC, Durham County, NC, Orange County, NC
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 1, 8:00 PM EDT | Thunderstorm Wind 0 | Chatham, NC | |
| May 1, 8:00 PM EDT | Thunderstorm Wind 0 | Durham, NC |
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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.7 hours before the alert went out and 75 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
- 564 J/kg
- Mixed-layer CIN
- -160 J/kg
- Mixed-layer LCL
- 1024 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KRDU 012345 SVRRDU NCC037-063-135-020030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE RALEIGH NC 743 PM EDT TUE MAY 1 1990 THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 830 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTH CENTRAL NORTH CAROLINA ...EASTERN CHATHAM COUNTY...SOUTHERN DURHAM COUNTY ...SOUTHEASTERN ORANGE COUNTY AT 740 PM EDT WEATHER RADAR SHOWED A SEVERE THUNDERSTORM EXTENDING FROM JUST WEST OF THE CITY OF DURHAM THROUGH CHAPEL HILL TO JUST NORTH OF PITTSBORO. AT 740 PM ORANGE COUNTY EMERGENCY DISPATCHERS RELAYED REPORTS OF TREES DOWN JUST NORTH OF CHAPEL HILL AND POWER LINES DOWN IN CHAPEL HILL. SEVERE THUNDERSTORM WINDS CAN REACH SPEEDS OF 60 MPH TO OVER 100 MPH. THESE WINDS BLOW DOWN TREES...POWER LINES...AND SEVERELY DAMAGE MOBILE HOMES...SOMETIMES BUILDINGS. VERY LARGE HAIL CAN INJURE ANYONE CAUGHT OUTSIgDE.
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.
In the hours before
Special weather statement, May 1, 3:57 PM EDT, 3 hours 46 minutes before
NCZ006-007-009-012200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENSBORO NC 350 PM EDT TUE MAY 1 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 9 PM EDT FOR THE NORTHERN FOOTHILLS AND NORTHERN MOUNTAINS OF NC... AT 345 PM NATIONAL WEATHER SERVICE RADAR SHOWED THUNDERSTORMS WITH HEAVY RAIN JUST TO THE WEST OF PILOT MOUNTAIN OF SURRY COUNTY...EXTREME WESTERN WILKES COUNTY AND ACROSS THE VIRGINIA BORDER TO THE SOUTHWEST OF STUART VIRGINIA. THE STORM WITH THE HEAVIEST RAIN WAS TO THE WEST OF PILOT MOUNTAIN. OTHER THUNDERSTORMS...SOME WITH VERY HEAVY RAIN...WAS STILL IN NORTHEAST TENNESSEE AND EXTREME SOUTHWEST VIRGINIA. MOVEMENT WAS TO THE EAST AT 30 MILES AN HOUR. PERSONS IN THE NORTHERN FOOTHILL COUNTIES OF SURRY AND WILKES AND STOKES COUNTY OF THE NORTHWEST PIEDMONT SHOULD BE ON THE LOOKOUT FOR VERY HEAVY DOWNPOURS...DANGEROUS LIGHTNING AND STRONG GUSTY WINDS AND TAKE SHELTER WHEN THEY APPROACH. GR
Special weather statement, May 1, 5:09 PM EDT, 2 hours 34 minutes before
NCZ006-007-009-012200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREENSBORO NC 509 PM EDT TUE MAY 1 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 9 PM EDT FOR THE NORTHERN FOOTHILLS AND NORTHERN MOUNTAINS OF NC... AT 500 PM NATIONAL WEATHER SERVICE RADAR SHOWED THUNDERSTORMS WITH HEAVY RAIN ALONG THE NORTH CAROLINA VIRGINA BORDER IN THE NORTHEAST CORNER OF SURRY AND STOKES COUNTIES OF NORTH COROLINA. THESE STORMS COULD PRODUCE SOME WITH VERY HEAVY RAIN AND GUSTY WINDS. PERSONS IN THE NORTHERN FOOTHILL COUNTIES OF SURRY AND WILKES AND STOKES COUNTY OF THE NORTHWEST PIEDMONT SHOULD BE ON THE LOOKOUT FOR VERY HEAVY DOWNPOURS...DANGEROUS LIGHTNING AND STRONG GUSTY WINDS ANDm TAKE SHELTER WHEN THEY APPROACH. DH
Special weather statement, May 1, 6:51 PM EDT, 52 minutes before
NCZALL-012355- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RALEIGH/DURHAM, NC 650 PM EDT TUE MAY 1 1990 ...SEVERE THUNDERSTORM WATCHES IN EFFECT THIS EVENING FOR MOST OF CENTRAL AND WESTERN NORTH CAROLINA... A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT TONIGHT FOR CENTRAL NORTH CAROLINA INCLUDING THE NORTHERN COASTAL PLAIN.. THE NORTHEAST PIEDMONT.. THE SANDHILLS.. AND JOHNSTON COUNTY OF THE CENTRAL COASTAL PLAIN. ANOTHER SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT THIS EVENING FOR THE MOUNTAINS AND NORTHERN FOOTHILLS OF NORTH CAROLINA. AT 645 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED NUMEROUS THUNDERSTORMS OVER THE NORTHWEST PIEDMONT AND ORANGE AND PERSON COUNTIES IN THE NORTHEAST PIEDMON. THESE STORMS WERE MOVING EAST AT 35 MPH. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR ROCKINGHAM AND GUILFORD COUNTIES FOR SEVERE THUNDERSTORMS IN THOSE COUNTIES. LARGE HAIL HAS BEEN REPORTED WITH THESE STORMS...SOME AS LARGE AS BASEBALLS IN EASTERN EASTERN TENNESSE AND GOLFBALLS IN RUTHERFORD COUNTY NORTH CAROLINA EARLIER THIS AFTERNOON. TREES HAVE BEEN REPORTED DOWNED IN A CHEROKEE AND GRAHAM COUNTIES IN THE NORTH CAROLINA MOUNTAINS. THIS SEVERE WEATHER EPISODE IS STILL A DEVELOPING ONE FOR MOST OF WESTERN AND CENTRAL NORTH CAROLINA. THUNDERSTORMS WILL CONTINUE TO MOVE EAST AT 35 MPH THROUGH THE PIEDMONT INTO CENTRAL NORTH CAROLINA. OTHER THUNDERSTORM CELLS MAY ALSO DEVELOP OVER THE COASTAL PLAIN AND SANDHILLS. THUNDERSTORMS WILL BE MOVING INTO THE TRIANGLE AREA BETWEEN NOW AND 8 O'CLOCK THIS EVENING. ANY OF THE THUNDERSTORMS THAT DEVELOP MAY CAUSE LARGE HAIL AND DAMAGING WINDS. LISTEN TO LOCAL RADIO..TV..OR WEATHER RADIO FOR LATER STATEMENTS OR POSSIBLE WARNINGS. HLW
Special weather statement, May 1, 7:15 PM EDT, 28 minutes before
NCZALL-020100- SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE RALEIGH/DURHAM, NC 700 PM EDT TUE MAY 1 1990 ...SEVERE THUNDERSTORM WATCHES IN EFFECT THIS EVENING FOR MOST OF CENTRAL AND WESTERN NORTH CAROLINA... A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT FOR WESTERN AND CENTRAL NORTH CAROLINA INCLUDING THE FOOTHILLS..THE PIEDMONT.. ..THE SANDHILLS.. THE NORTHERN COASTAL PLAIN.. AND JOHNSTON COUNTY OF THE CENTRAL COASTAL PLAIN. ANOTHER SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT TIL 900 PM EDT THIS EVENING FOR THE MOUNTAINS. AT 645 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED NUMEROUS THUNDERSTORMS OVER THE NORTHWEST PIEDMONT AND ORANGE AND PERSON COUNTIES IN THE NORTHEAST PIEDMONT. THESE STORMS WERE MOVING EAST AT 35 MPH. ^ EARLIER THIS AFTERNOON...WIND DAMAGE AND LARGE HAIL WAS REPORTED WITH SEVERE STORMS...HAIL AS LARGE AS BASEBALLS IN EASTERN TENNESSE AND GOLFBALLS IN RUTHERFORD COUNTY NORTH CAROLINA. TREES HAVE BEEN REPORTED DOWNED IN CHEROKEE AND GRAHAM COUNTIES IN THE NORTH CAROLINA MOUNTAINS. THIS SEVERE WEATHER EPISODE IS STILL A DEVELOPING ONE FOR MOST OF WESTERN AND CENTRAL NORTH CAROLINA. THUNDERSTORMS WILL CONTINUE TO MOVE EAST AT 35 MPH THROUGH THE PIEDMONT INTO CENTRAL NORTH CAROLINA. OTHER THUNDERSTORM CELLS MAY ALSO DEVELOP OVER THE COASTAL PLAIN AND SANDHILLS. THUNDERSTORMS WILL BE MOVING INTO THE TRIANGLE AREA BETWEEN 7 AND 8 O'CLOCK THIS EVENING. ANY OF THE THUNDERSTORMS THAT DEVELOP MAY CAUSE LARGE HAIL AND DAMAGING WINDS. LISTEN TO LOCAL RADIO..TV..OR WEATHER RADIO FOR LATER STATEMENTS OR POSSIBLE WARNINGS. KK CORRECTED TO REDEFINE LOCATION AND EXPIRATION TIMES OF THE TWO SEVERE THUNDERSTORM WA*TCHES IN EFFECT FOR NORTH CAROLINA.
Local storm report, May 1, 7:27 PM EDT, 16 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH/DURHAM, NC
725 PM EDT TUE MAY 01 1990
TIME EVENT
710 PM EDT TREES DOWN 3-4 MILES EAST OF BURLINGTON IN ALAMANCE
COUNTY, NC. REPOGRTED BY AMATEUR RADIO OPERATOR.
RFGSpecial weather statement, May 1, 7:36 PM EDT, 7 minutes before
NCZ005-020100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RALEIGH/DURHAM, NC 730 PM EDT TUE MAY 1 1990 ...STRONG THUNDERSTORMS MOVING INTO THE NORTHEAST PIEDMONT... A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT FOR THE NORTHEAST PIEDMONT AND MOST OTHER PORTIONS OF CENTRAL NORTH CAROLINA. WEATHER RADAR AT 725 PM EDT SHOWED STRONG THUNDERSTORMS MOVING SOUTHEAST AT 30 TO 35 MPH ACROSS CENTRAL DURHAM AND ORANGE COUNTIES AND EXTREME NORTHWEST CHATHAM COUNTIES. THESE STORMS HAVE HAD A HISTORY OF HIGH WIND AND HAIL AS THEY HAVE COME ACROSS THE NORTHERN PIEDMONT REGION. AT THEIR CURRENT RATE OF MOVEMENT THESE THUNDERSTORMS WILL BE CROSSING THE TRIANGLE AREA DURING THE TIME U_NTIL 9 PM. LISTEN TO LOCAL RADIO..TV..OR WEATHER RADIO FOR LATER STATEMENTS OR POSSIBLE WARNINGS. RFG
The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 9:51 PM EDT | Severe Thunderstorm Warning | RAH | Scotland | 54 min |
| May 1, 7:52 PM EDT | Severe Thunderstorm Warning | RAH | Wake | 68 min |
Nearby
Severe Thunderstorm Warnings in North Carolina, 1990Every severe thunderstorm warning in 1990
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.