Alert archive / Maryland / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 182, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 10, 2000, 6:20 PM EDT for Calvert County, Saint Mary's County, Maryland. It was in force for 40 min. 2 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
- Jul 10, 2000, 6:20 PM EDT (22:20 UTC)
- Expired
- Jul 10, 2000, 7:00 PM EDT
- In force
- 40 min
- Issued by
- NWS Baltimore/Washington
- Area
- Whole counties
Counties Calvert County, MD, Saint Mary's County, MD
The radar
The Sterling radar (KLWX), 107 km from the middle of the area, began a volume at 22:24 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 |
|---|---|---|---|
| Jul 10, 6:20 PM EDT | Thunderstorm Wind | Countywide, MD | Trees were downed. |
| Jul 10, 6:45 PM EDT | Thunderstorm Wind | Lusby, MD | A tree was downed onto a power line. |
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 |
|---|---|---|---|
| Jul 10, 4:30 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.3 hours before the alert went out and 99 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
- 56 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 1575 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 178 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
125 WUUS51 KLWX 102220 SVRWBC MDC009-037-102300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON 620 PM EDT MON JUL 10 2000 THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CALVERT COUNTY IN SOUTHERN MARYLAND ST. MARYS COUNTY IN SOUTHERN MARYLAND * UNTIL 700 PM EDT * AT 614 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 9 MILES NORTHWEST OF GOLDEN BEACH TO 28 MILES SOUTHWEST OF LEONARDTOWN...MOVING EAST AT 40 MPH. * SEVERE THUNDERSTORMS WILL BE... OVER GOLDEN BEACH AT 624 PM OVER PRINCE FREDERICK AT 630 PM OVER LEONARDTOWN AT 634 PM OVER HOLLYWOOD AT 638 PM OVER LUSBY AT 644 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...DEADLY LIGHTNING...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. HTS/DMW
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 Jul 10, 3:20 PM EDT, 3 hours earlier.
Area forecast discussion, Jul 10, 3:20 PM EDT, 3 hours before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
320 PM EDT MON JUL 10 2000
TWO WTCH BOXES OUT IN THE WRN HALF OF OUR CWA..AND WL NOT BE
SURPRISED IF MORE WL BE ISSUED B4 THE EVENG IS OUT. AFTERWARDS
CONTINUING A CHC OF PCPN THROUGH THE MRNG ON TUE AS FNT PUSHES
SWD...THEN MORE VERY COMFORTABLE MID SUMMER WX WL RETURN AS UPR LVL
TRAJECTORY BRINGS US ANOTHER AIR MASS FM THE NW. WED AND THURS LOOK
TO BE VERY NICE DAYS. AS BNDRY STALLS TO THE S AND WVS FORM ALONG IT
I'M BRINGING THE CHC OF PCPN BACK TO THE SRN PART OF THE AREA ON
FRI...AND THE ERN HALF OF THE AREA ON SAT. MRF WANTS TO DVLP A WK
CLOSED LOW E OF THE CST FOR SAT...THIS WOULD KEEP E/NE FLOW OVR THE
AREA AND DAYTIME HIGHS IN THE LM 80S.
WOODY!
DCA 70 85 66 84 / 40 30 10 20
BWI 70 85 66 84 / 40 30 10 20
MRB 69 83 60 82 / 40 20 10 10
.LWX...
SEVERE THUNDERSTORM WATCH THROUGH 6 PM...
MDZ002-003-VAZ026>031-WVZ048>055-VAZ039>042-050-051-
SEVERE THUNDERSTORM WATCH THROUGH 8 PM...
VAZ036>038-021-025-The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 5:57 PM EDT | Severe Thunderstorm Warning | LWX | Charles, Prince George's | 48 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.