Alert archive / Maryland / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 22, NWS Baltimore/Washington

May 22, 2001Calvert County, Saint Mary's County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at May 22, 2001, 5:09 PM EDT for Calvert County, Saint Mary's County, Maryland. It was in force for 36 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: May 22, 2001, 5:09 PM EDT (21:09 UTC)
Expired: May 22, 2001, 5:45 PM EDT
In force: 36 min
Issued by: NWS Baltimore/Washington
Area: Whole counties; the outline is the Mesonet’s reconstruction

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 21:11 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 22, 5:15 PM EDT	Thunderstorm Wind	Countywide, MD	Trees were downed.
May 22, 5:15 PM EDT	Thunderstorm Wind	Compton, MD	Trees and power lines were downed.

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 22, 1:30 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.2 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 542 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 22, 3:55 PM EDT, 1 hour 14 minutes earlier.

Area forecast discussion, May 22, 3:55 PM EDT, 1 hour 14 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
355 PM EDT TUE MAY 22 2001

BUSY SHIFT WHICH LOOKS TO REMAIN FAIRLY BUSY THROUGH AT LEAST MID
EVENING. THETA-E POOLING JUST S OF OUR CWA WHERE SVR WX HAS ALREADY
OCCURRED. LARGE LINE OVR CENTRAL W.V. XTNDS TO THE FL PANHANDLE HAS
HAD INCSRG LTNG OVR THE PAST TWO HRS. UNTIL THIS LINE MOVES THROUGH
FEEL WE HAVE A CHC AT SVR - BEST TIME FOR DC LOOKS TO BE ARND 8 PM.

AFTER FNT MOVES THROUGH LUKG FOR SKIES TO PARTIALLY CLR AND A PS DAY
ON WED. BUT IT LOOKS LIKE THE CHC OF PCPN WL CONT FOR THE NEXT SVRL
DAYS THEREAFTER AS LARGE UPR LVL LOW SITS OVR THE UPR MIDWEST AND
SPINS. THIS WL KEEPS US IN THE MOIST FLOW...KEEPING TALK OF A
DROUGHT AT BAY.

DCA   58  78  57  76 /  70  20  20  30
BWI   57  74  56  75 /  70  20  20  30
MRB   54  73  52  72 /  60  10  20  30
IAD   56  73  56  75 /  70  20  20  30
CHO   56  77  54  74 /  60  20  20  30
HGR   52  73  52  72 /  60  10  20  30
NHK   56  75  56  75 /  70  20  20  30

.LWX...SEVERE TSTM WATCH UNTIL 8 PM ENTIRE CWA...

MD...FLASH FLOOD WATCH FOR THIS EVENING FOR ZONES MDZ002>003.

VA...FLASH FLOOD WATCH FOR THIS EVENING FOR ZONES
VAZ021...VAZ025>031...VAZ036>040...VAZ050>051.

WV...FLASH FLOOD WATCH FOR THIS EVENING FOR ZONES WVZ048>055.

WOODY

In the hours before

Special weather statement, May 22, 1:41 PM EDT, 3 hours 28 minutes before

DCZ001-MDZ002>007-009>011-013-014-016>018-VAZ021-025>031-036>042-
050>057-WVZ048>055-230000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
141 PM EDT TUE MAY 22 2001

SEVERE THUNDERSTORM WATCH NUMBER 274 IS IN EFFECT UNTIL 800 PM EDT
FOR THE FOLLOWING AREAS...

DISTRICT OF COLUMBIA

IN MARYLAND... ALLEGANY...ANNE ARUNDEL...CALVERT...CARROLL...
CHARLES...FREDERICK...HARFORD...HOWARD...MONTGOMERY...NORTHERN
BALTIMORE...PRINCE GEORGES...SOUTHERN BALTIMORE...ST. MARYS AND
WASHINGTON

IN VIRGINIA... ALBEMARLE...ARLINGTON/FALLS CHURCH/ALEXANDRIA...
AUGUSTA...CLARKE...CULPEPER...FAIRFAX...FAUQUIER...FREDERICK...
GREENE...HIGHLAND...KING GEORGE...LOUDOUN...MADISON...NELSON...
ORANGE...PAGE...PRINCE WILLIAM/MANASSAS/MANASSAS PARK...
RAPPAHANNOCK...ROCKINGHAM...SHENANDOAH...SPOTSYLVANIA...STAFFORD AND
WARREN

IN WEST VIRGINIA... BERKELEY...GRANT...HAMPSHIRE...HARDY...
JEFFERSON...MINERAL...MORGAN AND PENDLETON

A COLD FRONT STRETCHING ACROSS WESTERN WEST VIRGINIA DOWN THROUGH
THE CAROLINAS WILL BE MOVING TO THE EAST DURING THE LATE AFTERNOON
AND EVENING. THUNDERSTORMS HAVE BEEN OCCURRING ALONG THE COLD FRONT
ALL DAY...AND BY LATE AFTERNOON ARE EXPECTED TO MOVE INTO THE
EASTERN PANHANDLE OF WEST VIRGINIA...AND WESTERN VIRGINIA. THESE
STORMS HAVE THE POTENTIAL TO PRODUCE HAIL UP TO ONE INCH IN DIAMETER
AND WINDS GUSTS TO 75 MPH.

THE STORMS ARE EXPECTED< TO PUSH INTO THE GREATER WASHINGTON DC AREA
DURING THE EVENING HOURS.

STAY TUNED TO NOAA WEATHER RADIO FOR UPDATES ON THE DEVELOPMENT OF
THESE STORMS.

ABW

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 22, 2:54 PM EDT	Severe Thunderstorm Warning	LWX	Spotsylvania	51 min
May 22, 4:52 PM EDT	Severe Thunderstorm Warning	LWX	Augusta, Nelson	23 min
May 22, 4:52 PM EDT	Severe Thunderstorm Warning	LWX	City of Staunton	23 min
May 22, 4:52 PM EDT	Severe Thunderstorm Warning	LWX	City of Waynesboro	23 min
May 22, 5:30 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Greene, Orange	45 min
May 22, 5:30 PM EDT	Severe Thunderstorm Warning	LWX	City of Charlottesville	45 min
May 22, 6:20 PM EDT	Severe Thunderstorm Warning	LWX	Fauquier, Prince William, Spotsylvania, Stafford, City of Fredericksburg	40 min
May 22, 6:46 PM EDT	Tornado Warning	LWX	Prince William	14 min
May 22, 7:06 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax	24 min
May 22, 7:06 PM EDT	Severe Thunderstorm Warning	LWX	King George	24 min
May 22, 7:19 PM EDT	Severe Thunderstorm Warning	LWX	Arlington, City of Alexandria	26 min
May 22, 6:58 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	17 min
May 22, 7:27 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	63 min
May 22, 7:27 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	63 min
May 22, 7:46 PM EDT	Tornado Warning	LWX	Calvert, Saint Mary's	24 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2001 Every severe thunderstorm warning in 2001

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.