Alert archive / Maryland / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 16, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 24, 1999, 8:50 AM EDT for Cecil County, Maryland. 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
- May 24, 1999, 8:50 AM EDT (12:50 UTC)
- Expired
- May 24, 1999, 9:10 AM EDT
- In force
- 20 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
County Cecil County, MD
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 24, 8:51 AM EDT | Thunderstorm Wind 50 | Countywide, MD |
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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 0.8 hours before the alert went out and 17 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
- 61 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 1309 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KPHL 241251 RRA SVRPHL MDC015-241310- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 850 AM EDT MON MAY 24 1999 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN CECIL COUNTY IN MARYLAND. * UNTIL 910 AM EDT. * AT 848 AM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES SOUTH OF CHESAPEAKE CITY OR 3 MILES EAST OF HACK POINT... MOVING EAST AT 50 MPH. THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS. THIS IS A DANGEROUS STORM. MOVE INSIDE A STRONG BUILDING AND DO NOT STAND NEAR WINDOWS. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. DO NOT DRIVE YOUR CAR WHERE WATER COVERS THE ROADWAY. THE WATER MAY BE DEEPER THAN YOU THINK. IF CAUGHT IN RISING FLOOD WATERS... ABANDON YOUR CAR QUICKLY AND MOVE TO HIGHER GROUND. FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER RADIO...YOUR LOCAL RADIO OR TELEVISION STATIONS...OR YOUR CABLE TELEVISION OUTLET. .END WN/MPD
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 24, 5:00 AM EDT, 3 hours 50 minutes before
PAZ054-055-060>062-067>071-NJZ001-007>010-012>026-DEZALL- MDZ008-012-015-019-020-241700- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 500 AM EDT MON MAY 24 1999 A STRONG COLD FRONT IN EASTERN OHIO EARLY THIS MORNING WILL SWEEP EAST ACROSS PENNSYLVANIA AND MARYLAND TODAY AND OFF THE NEW JERSEY AND DELAWARE COASTS LATE THIS EVENING. WELL SEE SOME RAIN AND POSSIBLE THUNDER THIS MORNING WELL AHEAD OF THE FRONT...THEN MORE THUNDERSTORMS - AND PERHAPS SEVERE WEATHER - THIS AFTERNOON AND EVENING CLOSER TO THE FRONT. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS LATER TODAY...WHICH MEANS POSSIBLE HAIL AND STRONG WINDS...IN ADDITION TO BRIEF HEAVY RAIN AND DANGEROUS LIGHTNING. FOR CURRENT WEATHER CONDITIONS AND THE LATEST FORECASTS...AS WELL AS ANY SEVERE WEATHER WATCHES OR WARNINGS WHICH MAY BE ISSUED LATER TODAY...STAY TUNED TO YOUR LOCAL NOAA WEATHER RADIO STATION. NATIONAL WEATHER SERVICE INFORMATION IS ALSO AVAILABLE VIA THE INTERNET...OUR OFFICE HOME PAGE IS AT www.nws.noaa.gov/er/phi KRAUS NWS MOUNT HOLLY NJ
Special weather statement, May 24, 5:00 AM EDT, 3 hours 50 minutes before
PAZ054-055-060>062-067>071-NJZ001-007>010-012>026-DEZALL- MDZ008-012-015-019-020-241700- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 500 AM EDT MON MAY 24 1999 A STRONG COLD FRONT IN EASTERN OHIO EARLY THIS MORNING WILL SWEEP EAST ACROSS PENNSYLVANIA AND MARYLAND TODAY AND OFF THE NEW JERSEY AND DELAWARE COASTS LATE THIS EVENING. WELL SEE SOME RAIN AND POSSIBLE THUNDER THIS MORNING WELL AHEAD OF THE FRONT...THEN MORE THUNDERSTORMS - AND PERHAPS SEVERE WEATHER - THIS AFTERNOON AND EVENING CLOSER TO THE FRONT. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS LATER TODAY...WHICH MEANS POSSIBLE HAIL AND STRONG WINDS...IN ADDITION TO BRIEF HEAVY RAIN AND DANGEROUS LIGHTNING. FOR CURRENT WEATHER CONDITIONS AND THE LATEST FORECASTS...AS WELL AS ANY SEVERE WEATHER WATCHES OR WARNINGS WHICH MAY BE ISSUED LATER TODAY...STAY TUNED TO YOUR LOCAL NOAA WEATHER RADIO STATION. NATIONAL WEATHER SERVICE INFORMATION IS ALSO AVAILABLE VIA THE INTERNET...OUR OFFICE HOME PAGE IS AT www.nws.noaa.gov/er/phi KRAUS NWS MOUNT HOLLY NJ
Special weather statement, May 24, 6:50 AM EDT, 2 hours before
MDZ019-020-015-DEZ002-241300- SPECIAL WEATHER STATEMENT - THUNDERSTORM WITH HAIL NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 650 AM EDT MON MAY 24 1999 ...THUNDERSTORM WITH POSSIBLE HAIL... AT 645 AM DOPPLER RADAR WAS TRACKING A THUNDERSTORM OVER TALBOT COUNTY MARYLAND. THE STORM WAS MOVING TO THE NORTHEAST 30 TO 40 MPH AND MAY CONTAIN HAIL AND A WIND GUST OF 30 TO 35 MPH. THE STORM WILL CONTINUE TO MOVE NORTHEAST AND PASS THROUGH NORTHERN CAROLINE AND SOUTHERN QUEEN ANNES COUNTIES...THEN ENTER THE STATE OF DELAWARE AND PASS NEAR DOVER AFB. EBERWINE
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 2:43 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 47 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 1999Every severe thunderstorm warning in 1999
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.