Alert archive / Maryland / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 140, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 27, 2002, 5:16 PM EDT for Washington County, Maryland. It was in force for 44 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
- Jun 27, 2002, 5:16 PM EDT (21:16 UTC)
- Expired
- Jun 27, 2002, 6:00 PM EDT
- In force
- 44 min
- Issued by
- NWS Baltimore/Washington
- Area
- Whole counties
County Washington County, MD
The radar
The Sterling radar (KLWX), 75 km from the middle of the area, began a volume at 21:16 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 27, 5:22 PM EDT | Thunderstorm Wind 52 E | Hagerstown, MD | Trees and power lines were downed by winds estimated around 60 MPH. |
| Jun 27, 5:30 PM EDT | Thunderstorm Wind 71 M | Smithsburg, MD | Winds gusting to at least 81 MPH caused structural damage and downed several trees. |
| Jun 27, 5:30 PM EDT | Hail 0.75 | Smithsburg, MD | Dime sized hail was reported. |
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, 9.3 hours before the alert went out and 148 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
- 287 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 1213 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 27, 2:15 PM EDT, 3 hours 1 minute earlier.
Area forecast discussion, Jun 27, 2:15 PM EDT, 3 hours 1 minute before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON 215 PM EDT THU JUN 27 2002 TNT THRU FRI NIGHT... MAIN ACTION SHOULD BE THIS AFTERNOON AND THIS EVENING. SPC HAS US IN A SLGHT RISK FOR SVR TSRA ALTHOUGH NO BOX FOR NOW. PA AND NY ARE HAVNG MORE OF THE FOCUSED CELLS EARLY THIS AFTERNOON. LARGE ARCING AREA OF SHRA AND TSRA SEEMS TO BE MORE OF OUR PROB IN THE NEXT FEW HOURS. BUT WITH THE LATENT HEAT NRG SPREAD OVR A LARGE AREA... NOT EXPECTING THAT AREA TO BE TOO MUCH OF A PROB. WILL HAVE TO SEE IF MORE INDIVDLZED CELL DVLP AHEAD OF THIS AREA OR POSSIBLY ALONG THE TAIL LATER THIS EVENING. CERTAINLY IS INSTAB AGAIN TDY WITH LI NEAR -9. BETTR SHEAR TODAY WITH SW FLOW BEGINNING TO INTENSIFY AHEAD OF THE IMPENDING COLD FRONT. ALSO WILL HAVE TO WATCH RAINFALL AS PRECIP H20 IS AROUND 1.8 INCHES...STRNG SW FLOW AROUND 15 TO 20 KT SHOULD KEEP STORMS MOVNG HOWEVER. TOMORROW THERE MAY BE SOME MORNG CLDS...PART IN THE S...BUT THEN CLEARING AND NICE WITH HIGHS IN THE MID TO UPPER 80S. FRI NIGHT WILL BE MCLR WITH LOWS IN THE 60S. NGM ETA AND AVN MOS ALL REMARKABLY SIMILAR WITH TEMPS...SO STAYED CLOSE TO GUID. STRONG LONG TERM SAT THRU THE FOURTH OF JULY... MEDIUM RANGE MDLS SHOWING SOME DIVERGENCE IN THEIR SOLNS BY THE END OF THE WEEKEND. OVERALL THE EXTENDED SEEMS FOR THE MOST PART QUIET...BUT SIG DIFFERENCES AMONG AVN ENSEMBLES DEVELOP BY THE END OF THE WEEKEND. TIMING OF FEATURES SEEMS TO BE REASONABLE...BUT ENSEMBLE SPREADS SHOW THE ENSEMBLE MEMBERS DIVERGING ON STRENGTH OF FEATURES AS THEY MOVE ACROSS THE NRN STREAM. ENSEMBLE MEANS DEVELOP WEAK TROFING OVER THE ERN CONUS BY THE MIDDLE OF NEXT WK...AND THIS DOESN/T SEEM UNREASONABLE. SOME OF THE MEMBERS OF THE CANADIAN ENSEMBLES FAVOR THIS SOLN AS WELL. NET IMPACT WL BE SMALL ON SENSIBLE WX UNTIL LATER PART OF THE WK. AVN GOES A LITTLE FURTHER DEVELOPING A CUTOFF LOW OVER THE CAROLINAS...EVENTUALLY MOVING THIS SYS TOWARD THE CWA BY MID WK. WHILE THIS SOLN IS SOMEWHAT SUPPORTED BY THE ENSEMBLES...WL HOLD OFF ON ADDING POPS TO FCST FOR NOW AND WAIT FOR A LITTLE MORE RUN TO RUN CONSISTENCY. VERY SIMILAR WX PATN FOR MUCH OF THE WK WITH RIDGING OVER MUCH OF THE ERN CONUS. XPCT LTL DAY TO DAY VARIATION IN TEMPS. PREV FCST LOOKS GOOD AND WL MAKE FEW CHGS. MANNING .LWX... DC...NONE. MD...NONE. VA...NONE. WV...NONE.
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 5:33 PM EDT | Special Marine Warning | LWX | 87 min | |
| Jun 27, 6:43 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, City of Alexandria | 47 min |
| Jun 27, 6:53 PM EDT | Special Marine Warning | LWX | 112 min | |
| Jun 27, 6:53 PM EDT | Special Marine Warning | LWX | 112 min | |
| Jun 27, 6:53 PM EDT | Special Marine Warning | LWX | 112 min | |
| Jun 27, 6:53 PM EDT | Special Marine Warning | LWX | 112 min | |
| Jun 27, 7:18 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 57 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2002Every severe thunderstorm warning in 2002
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.