Alert archive / Maryland / Flash Flood Warnings in 2001

Flash Flood Warning 34, NWS Baltimore/Washington

June 23, 2001Carroll County, Maryland

NWS Baltimore/Washington issued this flash flood warning at Jun 23, 2001, 1:03 AM EDT for Carroll County, Maryland. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 23, 2001, 1:03 AM EDT (05:03 UTC)
Expired: Jun 23, 2001, 2:00 AM EDT
In force: 57 min
Issued by: NWS Baltimore/Washington
Area: Whole counties

County Carroll County, MD

The radar

The Sterling radar (KLWX), 77 km from the middle of the area, began a volume at 05:04 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.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 5.1 hours before the alert went out and 230 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: 483 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 854 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 26 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 flash flood 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 flash flood warning went out at Jun 22, 11:13 PM EDT, 1 hour 50 minutes earlier.

Area forecast discussion, Jun 22, 11:13 PM EDT, 1 hour 50 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
1113 PM EDT FRI JUN 22 2001

UPDATED ZONES TO TAKE OUT SVR TSTM WATCH WHICH EXPIRED AT 11 PM.
ALSO...FLASH FLOOD WATCH HAS BEEN EXTENDED TO NE AND NC CWA BECAUSE
OF PERSISTENT RAINFALL THAT IS EXPECTED TO CONTINUE IN THIS AREA AND
GRADUALLY MOVE E THRU EARLY MORNING HOURS.

.LWX...
DC...FLASH FLOOD WATCH UNTIL 4 AM ZONE DCZ001.

MD...FLASH FLOOD WATCH UNTIL 4 AM ZONES MDZ002>003...MDZ004>007...
MDZ009>011...MDZ013>014.

VA...FLASH FLOOD WATCH UNTIL 4 AM ZONES VAZ021...
VAZ025>031...VAZ036>040...VAZ050>051...VAZ041>042...VAZ052>054.

WV...FLASH FLOOD WATCH UNTIL 4 AM ZONES WVZ048>055.

MMARGRAF

In the hours before

Local storm report, Jun 22, 8:12 PM EDT, 4 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
812 PM EDT FRI JUN 22 2001

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0615 PM    LEESBURG                  VA   .88 INCH HAIL
06/22/01   LOUDOUN                        DIME SIZED HAIL REPORTED
                                          BY SPOTTER.

0630 PM    4 W ASHBURN               VA   WIND DAMAGE
06/22/01   LOUDOUN                        POWERLINES DOWN ON BELMONT
                                          RIDGE ROAD NEAR THE
                                          GREENWAY. REPORTED BY
                                          SKYWARN.

0645 PM    COUNTYWIDE                VA   FLASH FLOODS
06/22/01   LOUDOUN                        WATER OVER INTERSECTION OF
                                          ROUTE 7 AND ASHBURN
                                          VILLIAGE ROAD. 2 FEET OF
                                          WATER IN INTERSECTION OF
                                          ROUTE 7 AND 659. REPORTED
                                          BY SPOTTERS.

0710 PM    SOUTHWEST PORTION         MD   FLASH FLOODS
06/22/01   ALLEGANY                       FLOODING IN RAWLINGS. ONE
                                          TREE DOWNED ONTO A
                                          POWERLINE IN FROSTBURG.
                                          REPORTED BY EOC.

0730 PM    HANGING ROCK              VA   FLASH FLOODS
06/22/01   SHENANDOAH                     RIVERS RISING RAPIDLY NEAR
                                          HANGING ROCK AND ROUTE 259
                                          AND 612. HELICOPTER RESCUE
                                          OF WOMAN IN CAR. REPORTED
                                          BY SKYWARN.

0745 PM    FULKS RUN                 VA   FLASH FLOODS
06/22/01   ROCKINGHAM                     EVACUATING AREA BETWEEN
                                          BERGTON AND BROADWAY DUE TO
                                          FLOODING. REPORTED BY 911
                                          CENTER.

MKM

Local storm report, Jun 22, 10:45 PM EDT, 2 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
1045 PM EDT FRI JUN 22 2001

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0429 PM    POINT OF ROCKS            MD   FLASH FLOODS
06/22/01   FREDERICK                      FLOODED ROADS AT RAILROAD
                                          CROSSING ON ROUTE 28.
                                          REPORTED BY SKYWARN.

0700 PM    LUCKETTS                  VA   FLASH FLOODS
06/22/01   LOUDOUN                        FLOODING REPORTED ON ROUTE
                                          663 AND AT THE INTERSECTION
                                          OF ROUTE 15 AND 662.
                                          REPORTED BY SKYWARN.

0720 PM    ARCOLA                    VA   FLASH FLOODS
06/22/01   LOUDOUN                        WATER COVERED ROUTE 659.
                                          REPORTED BY SKYWARN.

0723 PM    COUNTYWIDE                VA   FLASH FLOODS
06/22/01   LOUDOUN                        LIMESTONE BRANCH OUT OF
                                          BANKS AT ROUTE 15 AND
                                          COOLSPRING. REPORTED BY
                                          SKYWARN.

0845 PM    WESTERN PORTION           VA   FLASH FLOODS
06/22/01   SHENANDOAH                     PROPANE TANK WASHED AWAY
                                          BY FLOOD WATERS WEST OF MT.
                                          JACKSON. RAPIDLY RISING
                                          WATER ON RIVERS. SOME LOW
                                          WATER CROSSINGS CLOSED.
                                          CARS IN WATER AND SOME
                                          WATER RESCUES. REPORTED BY
                                          SKYWARN.

0853 PM    BROOKVILLE                MD   FLASH FLOODS
06/22/01   MONTGOMERY                     ROUTE 97 NORTH OF
                                          BROOKVILLE CLOSED BY HIGH
                                          WATER. REPORTED BY SKYWARN.

0900 PM    COUNTYWIDE                MD   FLASH FLOODS
06/22/01   MONTGOMERY                     THREE WATER RESCUES FROM
                                          CARS NEAR OLNEY. THREE
                                          ROADS CLOSED BY HIGH WATER.
                                          4.00 INCHES OF RAIN AT
                                          BRIGHTON DAM. REPORTED BY
                                          POLICE AND FIRE AND RESCUE.

0910 PM    MANASSAS                  VA   1.00 INCH HAIL
06/22/01   PRINCE WILLIAM

0945 PM    COUNTYWIDE                MD   FLASH FLOODS
06/22/01   CARROLL                        A FEW ROADS AND LOW LYING
                                          AREAS FLOODED. REPORTED BY
                                          911 CENTER.

1040 PM    COUNTYWIDE                MD   FLASH FLOODS
06/22/01   HOWARD                         SEVERAL ROADS FLOODED AND
                                          ONE VEHICLE TRAPPED.
                                          SEVERAL WATER RESCUES IN
                                          PROGRESS. SEVERAL BASEMENTS
                                          FLOODED. REPORTED BY EOC.

MKM

Local storm report, Jun 23, 12:20 AM EDT, 43 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 9:14 PM EDT	Flash Flood Warning	LWX	Rockingham, City of Harrisonburg	3 hr
Jun 22, 10:07 PM EDT	Flash Flood Warning	LWX	Shenandoah	3 hr
Jun 22, 10:22 PM EDT	Flash Flood Warning	LWX	City of Alexandria	3 hr
Jun 22, 10:30 PM EDT	Flash Flood Warning	LWX	Loudoun	3 hr
Jun 22, 11:58 PM EDT	Flash Flood Warning	LWX	Rockingham	3 hr
Jun 22, 8:41 PM EDT	Flash Flood Warning	LWX	Howard	3 hr
Jun 22, 9:55 PM EDT	Flash Flood Warning	LWX	Carroll	3 hr
Jun 22, 10:41 PM EDT	Flash Flood Warning	LWX	Howard	3 hr

Nearby

Flash Flood Warnings in Maryland, 2001 Every flash flood 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.