Alert archive / Delaware / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 13, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 10, 2000, 5:33 PM EDT for New Castle County, Delaware; Cecil County, Maryland; Chester County, Pennsylvania. It was in force for 27 min. 3 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 10, 2000, 5:33 PM EDT (21:33 UTC)
- Expired
- May 10, 2000, 6:00 PM EDT
- In force
- 27 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties New Castle County, DE, Cecil County, MD, Chester County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 10, 5:40 PM EDT | Hail 1.75 | Lewisville, PA | |
| May 10, 5:58 PM EDT | Hail 1.75 | Elkton, MD | |
| May 10, 6:08 PM EDT | Hail 0.75 | Newark, DE |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 10, 3:45 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.6 hours before the alert went out and 38 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
- 786 J/kg
- Mixed-layer CIN
- -165 J/kg
- Mixed-layer LCL
- 1290 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -75 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 102134 SVRPHL DEC003-MDC015-PAC029-102200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 533 PM EDT WED MAY 10 2000 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN NEW CASTLE COUNTY IN DELAWARE. NORTHEASTERN CECIL COUNTY IN NORTHEAST MARYLAND. SOUTH CENTRAL CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA. * UNTIL 600 PM EDT. * AT 530 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM... 11 MILES WEST OF NEWARK...MOVING EAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... NEWARK AT 545 PM EDT... NEWPORT...STANTON AT 555 PM EDT... ELSMERE AT 600 PM EDT... THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS AND LARGE HAIL. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE TELEVISION OUTLET. NNNN
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 5:51 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 24 min |
| May 10, 6:00 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 30 min |
| May 10, 8:57 AM EDT | Severe Thunderstorm Warning | PHI | Carbon | 23 min |
| May 10, 9:30 AM EDT | Severe Thunderstorm Warning | PHI | Monroe | 30 min |
| May 10, 3:55 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 25 min |
| May 10, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 25 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2000Severe Thunderstorm Warnings in Maryland, 2000Severe Thunderstorm Warnings in Pennsylvania, 2000Every severe thunderstorm warning in 2000
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.