Alert archive / Maryland / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 84, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at May 13, 2000, 7:17 PM EDT for Charles County, Prince George's County, Maryland. It was in force for 43 min. 12 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 13, 2000, 7:17 PM EDT (23:17 UTC)
- Expired
- May 13, 2000, 8:00 PM EDT
- In force
- 43 min
- Issued by
- NWS Baltimore/Washington
- Area
- Whole counties
Counties Charles County, MD, Prince George's County, MD
The radar
The Sterling radar (KLWX), 60 km from the middle of the area, began a volume at 23:19 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 13, 7:20 PM EDT | Thunderstorm Wind | Suitland, MD | Tree damage was reported. |
| May 13, 7:23 PM EDT | Thunderstorm Wind | Oxon Hill, MD | Two roads were blocked by downed trees. |
| May 13, 7:30 PM EDT | Thunderstorm Wind | Ft Washington, MD | Tree damage was reported. |
| May 13, 7:30 PM EDT | Thunderstorm Wind | Temple Hills, MD | A tree was downed onto Hagen Road. |
| May 13, 7:35 PM EDT | Thunderstorm Wind 78 M | Andrews Afb, MD | A wind gust of at least 90 MPH was recorded. |
| May 13, 7:40 PM EDT | Thunderstorm Wind 52 E | Clinton, MD | A wind gust of 60 MPH was estimated. |
| May 13, 7:40 PM EDT | Thunderstorm Wind | Brandywine, MD | Several trees and power lines were downed and a billboard was twisted. |
| May 13, 7:45 PM EDT | Thunderstorm Wind 52 E | Upper Marlboro, MD | Ten trees were downed onto cars and power lines by winds estimated at 60 MPH. |
| May 13, 7:45 PM EDT | Tornado F1 | Brandywine, MD | The tornado felled several trees onto houses and cars before it crossed into Calvert County. |
| May 13, 8:07 PM EDT | Thunderstorm Wind | Accokeek, MD | Trees were downed. |
| May 13, 8:07 PM EDT | Hail 0.75 | Accokeek, MD | Dime sized hail fell. |
| May 13, 8:08 PM EDT | Thunderstorm Wind 52 E | Clinton, MD | Winds estimated at 60 MPH pushed a car into the median on Highway 301. |
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 13, 2:45 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.3 hours before the alert went out and 53 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
- 680 J/kg
- Mixed-layer CIN
- -169 J/kg
- Mixed-layer LCL
- 1644 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- -23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.7
The text
As transmitted, in the capitals the NWS used until 2016.
872 WUUS51 KLWX 132318 SVRWBC MDC017-033-140000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON 717 PM EDT SAT MAY 13 2000 THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... PRINCE GEORGES COUNTY IN CENTRAL MARYLAND CHARLES COUNTY IN SOUTHERN MARYLAND * UNTIL 800 PM EDT * AT 717 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS WITH LARGE HAIL... ALONG A LINE EXTENDING FROM FORESTVILLE TO 4 MILES NORTHEAST OF INDIAN HEAD TO 2 MILES SOUTH OF QUANTICO...MOVING EAST AT 40 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... ACCOKEEK...ANDREWS AFB AT 720 PM EDT CLINTON...KETTERING AT 722 PM EDT UPPER MARLBORO...RIPLEY AT 730 PM EDT MARLTON...CHELTENHAM AT 732 PM EDT BRANDYWINE...WHITE PLAINS AT 734 PM EDT SEEK SAFETY INDOORS AWAY FROM WINDOWS. IF CAUGHT OUTSIDE...DO NOT STAND UNDERNEATH TREES OR OTHER ISOLATED OBJECTS. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. AS THE STORM APPROACHES MOVE TO A PLACE OF SAFETY. TUNE INTO NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR THE LATEST WEATHER INFORMATION. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT SATURDAY EVENING FOR WESTERN VIRGINIA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 800 PM EDT SATURDAY EVENING FOR AND NORTHWESTERN MARYLAND AND NORTHWESTERN VIRGINIA AND THE PANHANDLE OF WEST VIRGINIA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT SATURDAY EVENING FOR AND NORTHWESTERN MARYLAND AND NORTHWESTERN VIRGINIA AND THE PANHANDLE OF WEST VIRGINIA. .END/ HTS/SMZ
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 Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at May 13, 2:40 PM EDT, 4 hours 37 minutes earlier.
Area forecast discussion, May 13, 2:40 PM EDT, 4 hours 37 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON 240 PM EDT SAT MAY 13 2000 ...SHORT TERM... AT 18Z...WK BNDRY DRAPED OVR THE NE ZNS SLOWLY MOVING NEWD IN RESPONSE TO SW FLO AHEAD OF APPROACHING CDFNT. S OF THE BNDRY...OVER MUCH OF THE CWA...ATMS IS VERY UNSTABLE WITH LIS AROUND -10...CAPES OF 3500 TO 4500...AND DWPTS IN THE 70S. ATMS ALSO BEGINNING TO DESTABILIZE OVR NE ZNS AS BNDRY MVS NWD. OLD OUTFLOW BNDRY OVR WRN ZNS NOW ACTING AS A FOCUS FOR REDVLPMT OF CNVCTN. EXPECT PREFRONTAL CNVCTN TO INTENSIFY AND MV EWD DURING THE REST OF THE AFTRN. MAIN THREAT WL BE LARGE HAIL AND SPOTTY DAMAGING WINDS. NOT A LOT OF DIRECTIONAL SHEAR TO SUPPORT TORNADOES. HWVR...CELLS THAT FORM AT THE INTERSECTION OF THE APPROACHING BNDRY WITH THE OLD BNDRY DRAPED OVR THE NE ZNS WL HAVE TO BE WATCHED CLOSELY. WATCHBOX OUT. CDFNT PUSHES E OF THE CWA BY 03Z. WL KEEP A RMDNR OF AFT PD E OF THE BLUE RDG AND KEEP TSRA GOING IN OUR SE COUNTIES INTO THE EARLY OVRNGT PD. ...LONG TERM... LONGWAVE TROF SETS UP OVR ERN PTN OF THE NATION SUN THRU MON. AT THE SFC...HI PRES BUILDS OVR THE AREA...BUT SLIPS OFFSHR MON. A VORT MAX ROTATING AROUND THE UPR LVL TROF WL SEND ANOTHER WK BNDRY THRU THE AREA LATE MON. FCST WL BE SUNNY SUN AND CLR SUN NGT. AVN AND ETA HINT AT SOME CLNDS ON MON AS WE GET RETURN FLOW AROUND THE DEPARTING SFC HI AND THE WEAK FRONT APPROACHES FROM THE NW. WL GO P/S 4TH PD. DWPTS FCSTD TO FALL INTO THE LWR 40S SUN THRU MON RESULTING IN LOW HUMIDITY. FOR TEMPS...AVN AND NGM MOS WITHIN A FEW DEG OF ONE ANOTHER WITH THE AVN LEANING ON THE COOL SIDE. WENT WITH A BLEND OF THE AVN AND NGM MOS 2ND & 4TH PDS. WENT SLIGHTLY BELOW GUIDANCE 3RD PD AS SKC ALONG WITH LGT WINDS WL RESULT IN GOOD RADIATIONAL COOLING. BEYOND 4TH PD...HIGH PRES BUILDS INTO THE AREA TUE & WED WITH NEAR NORMAL TEMPS AND LOW HUMIDITY. COULD SEE SOME CLOUDINESS RETURN THU AS SFC HI SLIPS OFFSHR AND WMFNT APPROACHES FM THE W. .LWX...NONE.
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 2:55 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Montgomery | 50 min |
| May 13, 4:40 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Harford | 35 min |
| May 13, 5:05 PM EDT | Tornado Warning | LWX | Baltimore | 25 min |
| May 13, 5:13 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 47 min |
| May 13, 5:22 PM EDT | Tornado Warning | LWX | Harford | 38 min |
| May 13, 5:40 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 65 min |
| May 13, 6:16 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 29 min |
| May 13, 6:39 PM EDT | Severe Thunderstorm Warning | LWX | Carroll | 66 min |
| May 13, 6:42 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 33 min |
| May 13, 6:56 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Howard, City of Baltimore | 34 min |
| May 13, 7:35 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 40 min |
| May 13, 7:35 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 40 min |
| May 13, 7:55 PM EDT | Flash Flood Warning | LWX | Baltimore, Harford | 110 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 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; radar from the NEXRAD Level II archive.