Alert archive / Maryland / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 75, NWS Philadelphia/Mount Holly

July 1, 2001Kent County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2001, 4:27 PM EDT for Kent County, Maryland. It was in force for 33 min. 1 report 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 1, 2001, 4:27 PM EDT (20:27 UTC)
Expired: Jul 1, 2001, 5:00 PM EDT
In force: 33 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

County Kent County, MD

What was reported inside it

Time	Report	Where	Remark
Jul 1, 4:45 PM EDT	Thunderstorm Wind 52 E	Betterton, MD

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

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.5 hours before the alert went out and 117 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: 737 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1231 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 012028
SVRPHI

MDC029-012100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
427 PM EDT SUN JUL 1 2001

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KENT COUNTY IN NORTHEAST MARYLAND.

* UNTIL 500 PM EDT.

* AT 423 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM... 3 MILES NORTHEAST OF ROCK HALL...MOVING EAST
  AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CHESTERTOWN AT 440 PM.

HAIL THE SIZE OF GOLFBALLS OR LARGER...AND WINDS GREATER THAN 55
MILES AN HOUR...ARE EXPECTED FROM THIS STORM. SEEK SHELTER IN A
STURDY STRUCTURE UNTIL THE STORM HAS PASSED.

FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE
TELEVISION OUTLET.
 
$$

LAT...LON 3914 7628 3909 7621 3917 7605 3920 7606
          3924 7601 3926 7591 3931 7584 3937 7591
          3936 7614 3926 7622

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 1, 4:53 PM EDT	Severe Thunderstorm Warning	PHI	Queen Anne's	37 min
Jul 1, 5:02 PM EDT	Severe Thunderstorm Warning	PHI	Kent	28 min
Jul 1, 5:38 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's	37 min
Jul 1, 6:21 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	24 min
Jul 1, 6:33 PM EDT	Severe Thunderstorm Warning	PHI	Talbot	42 min
Jul 1, 7:00 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	30 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.