Alert archive / Maryland / Tornado Warnings in 2001

Tornado Warning 8, NWS Baltimore/Washington

July 10, 2001Carroll County, Frederick County, Maryland

NWS Baltimore/Washington issued this tornado warning at Jul 10, 2001, 3:55 PM EDT for Carroll County, Frederick County, Maryland. It was in force for 50 min. 2 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Jul 10, 2001, 3:55 PM EDT (19:55 UTC)
Expired: Jul 10, 2001, 4:45 PM EDT
In force: 50 min
Issued by: NWS Baltimore/Washington
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Carroll County, MD, Frederick County, MD

The radar

The Sterling radar (KLWX), 85 km from the middle of the area, began a volume at 19:43 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, 4:06 PM EDT	Thunderstorm Wind 60 M	Emmitsburg, MD	A 69 MPH wind gust was reported. Three workers were injured when a barn under construction collapsed.
Jul 10, 4:30 PM EDT	Thunderstorm Wind	Countywide, MD	Trees were downed and a roof was damaged.

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, 1:45 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.9 hours before the alert went out and 86 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: 37 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1756 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS51 KLWX 101956
TORLWX

MDC013-021-102045-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
355 PM EDT TUE JUL 10 2001

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* TORNADO WARNING FOR...
  CARROLL COUNTY IN NORTH CENTRAL MARYLAND
  NORTHERN FREDERICK COUNTY IN NORTH CENTRAL MARYLAND

* UNTIL 445 PM EDT

* AT 353 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO OVER EMMITSBURG...MOVING SOUTHEAST AT 30 MPH.

* THE TORNADO IS EXPECTED TO BE...
  OVER EMMITSBURG AT 402 PM
  OVER TANEYTOWN AT 418 PM
  OVER WESTMINSTER AT 436 PM

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3988 7742 3972 7755 3942 7699 3967 7686

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Jul 10, 3:10 PM EDT, 45 minutes earlier.

Area forecast discussion, Jul 10, 3:10 PM EDT, 45 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
310 PM EDT TUE JUL 10 2001

SCOPE GETTING A LTL COLORFUL TO THE N. CDFNT SRN PA PROGGED TO INCH
THRU AREA LT THIS AFTN M-D LINE...ELY EVE WASH DC-W99... NR MIDNGT
SRN MD-CHO.  JET DYNAMICS DRIVING SVR THREAT. WBZ 11-12K FT REDUCING
HAIL THREAT. STORMS ARE MVG W/ PWAT 1-1.5 IN SO NOT A HUGE FLOOD
THREAT. WL USE ENHANCED WRDG IN EVE PD...SCT POPS.

THRAFTR...CAA/LWR DEWPT ADVCTN FOR TMRW. FLW HAS SLGT DWNSLP
COMPONENT...SO TEMPS NOT TOO MUCH LWR...BUT MUCH DRIER/MORE COMFY.
CAA CONTS INTO TMRW NGT...MARKING BGNG OF BLO NRML TEMPS THRU END OF
WK.

AFTN PKG WIBIS ON SKED AT 1930 UTC/330 PM EDT. G'NGT!

FCSTID = 50...HTS
DCA   72  87  64  85 /  30  10   0   0
BWI   68  88  58  85 /  30  10   0   0
MRB   66  85  56  84 /  30   0   0   0
IAD   66  88  56  84 /  30  10   0   0
CHO   68  89  60  85 /  30   0   0   0
HGR   64  84  54  82 /  30   0   0   0
NHK   73  89  66  83 /  30  10   0   0
W99   62  82  52  80 /  30   0   0   0

.LWX...
DC...NONE.
MD...NONE.
VA...NONE.
WV...NONE.

In the hours before

Special weather statement, Jul 10, 1:15 PM EDT, 2 hours 40 minutes before

DCZ001-MDZ002>007-009>011-013-014-016>018-VAZ021-025>031-036>042-
050>057-WVZ048>055-110000-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
115 PM EDT TUE JUL 10 2001

...SEVERE THUNDERSTORMS POSSIBLE THIS AFTERNOON AND EVENING...

THE STORM PREDICTION CENTER IN NORMAN OKLAHOMA HAS INDICATED THERE
IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON ACROSS
EASTERN WEST VIRGINIA...MUCH OF MARYLAND...THE DISTRICT OF
COLUMBIA...AND NORTHERN VIRGINIA. THE PRIMARY THREAT FROM THESE
STORMS WILL BE DAMAGING WIND GUSTS.

A COLD FRONT PUSHING SOUTH TOWARDS THE AREA WILL SPARK SHOWERS AND
THUNDERSTORMS THIS AFTERNOON AND TONIGHT. THE COLD FRONT WILL ENTER
NORTHERN MARYLAND LATE THIS AFTERNOON...AND CLEAR CENTRAL VIRGINIA
AND SOUTHERN MARYLAND TOWARDS DAWN.

STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR ANY
POSSIBLE SEVERE WEATHER WATCHES OR WARNINGS.

FOR ADDITIONAL bWEATHER INFORMATION, CHECK OUR WEB SITE AT
HTTP://WWW.NWS.NOAA.GOV/ER/LWX.

HTS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 3:40 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	65 min
Jul 10, 4:32 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	58 min
Jul 10, 4:32 PM EDT	Severe Thunderstorm Warning	LWX	City of Baltimore	58 min
Jul 10, 4:40 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Howard	65 min
Jul 10, 4:47 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	58 min
Jul 10, 4:53 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	52 min
Jul 10, 5:23 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, City of Baltimore	37 min
Jul 10, 6:30 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	45 min

Nearby

Tornado Warnings in Maryland, 2001 Every tornado warning in 2001 Tornadoes 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.