Alert archive / Maryland / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 166, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 29, 2000, 9:00 PM EDT for Prince George's County, Maryland. It was in force for 45 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
- Jun 29, 2000, 9:00 PM EDT (01:00 UTC)
- Expired
- Jun 29, 2000, 9:45 PM EDT
- In force
- 45 min
- Issued by
- NWS Baltimore/Washington
- Area
- Whole counties
County Prince George's County, MD
The radar
The Sterling radar (KLWX), 58 km from the middle of the area, began a volume at 00:59 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 |
|---|---|---|---|
| Jun 29, 9:30 PM EDT | Thunderstorm Wind | Upper Marlboro, MD | A tree was downed onto a road. |
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
Washington/Dulle, VA (KIAD), launched 00:00Z, 1.0 hours before the alert went out and 50 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
- 101 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 2025 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
361 WUUS51 KLWX 300102 SVRWBC MDC033-300145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON 900 PM EDT THU JUN 29 2000 THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... PRINCE GEORGES COUNTY IN CENTRAL MARYLAND * UNTIL 945 PM EDT * AT 859 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER SEAT PLEASANT...MOVING SOUTHEAST AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE... 3 MILES SOUTHWEST OF MITCHELLVILLE AT 904 PM 3 MILES NORTHEAST OF FORESTVILLE AT 906 PM OVER LARGO AT 908 PM OVER KETTERING AT 918 PM OVER UPPER MARLBORO AT 932 PM IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 55 MPH...AND VERY HEAVY RAIN. 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. ABW/PAP
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 Jun 29, 8:50 PM EDT, 10 minutes earlier.
Area forecast discussion, Jun 29, 8:50 PM EDT, 10 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON 850 PM EDT THU JUN 29 2000 CONV/TSTM ACTVTY HAS REFUSED TO QUIT ACRS THE NE PORTION OF CWA IN SPITE OF THE SETTING SUN. ACTVTY INCRSG RAPIDLY ATTM FM JUST NE OF BWI TO JUST N OF DCA IS APPARENTLY IN A FAVORABLE REGION PER LTST MESO FIELD SUPPORT ALONG THE BEST SURFACE MOISTURE FLUX CONVRGNC AND MAX TD AXIS. OF COURSE ANY ACTVTY ATTM HAS THE UPR SUPPORT OF THE TAIL-END OF THE VORT MAX MVG ACRS THE SE GRT LKS THIS EVNG AS REFLECTED IN THE 18Z ETA GUIDNC. IN ANY EVENT THE ABV IS ASSOC WITH THE FINAL BNDRY WHICH WL USHER IN DRIER AIR ACRS THE CWA OVRNGT AND GIVE CAUSE FOR MUCH MORE COMFORTABLE CONDITIONS THAN RECENT DAYS WITH TDS SCHEDULED WELL DOWN IN THE 50S AT LEAST THRU SAT. THATS IT FOR NOW...NEXT TIME. .LWX... DC...NONE. MD...NONE. VA...NONE. WV...NONE. PAP
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.