Alert archive / Florida / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 3, NWS Melbourne, FL

March 7, 2003Seminole County, Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Mar 7, 2003, 1:23 PM EST for Seminole County, Volusia County, Florida. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Mar 7, 2003, 1:23 PM EST (18:23 UTC)
Expired
Mar 7, 2003, 2:15 PM EST
In force
52 min
Issued by
NWS Melbourne, FL
Area
Counties, with a storm outline in the text

Counties Seminole County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 97 km from the middle of the area, began a volume at 18:23 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Mar 7, 12:00 PM ESTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 6.4 hours before the alert went out and 72 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-pSkew-T log-p diagram, Cape Canaveral, FL at 12:00Z on 2003-03-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 188 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cape Canaveral, FL at 12:00Z on 2003-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
188 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
905 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS52 KMLB 071823
SVRMLB
FLC117-127-071915-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
122 PM EST FRI MAR 7 2003

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SEMINOLE COUNTY
  SOUTHERN VOLUSIA COUNTY
  IN EAST CENTRAL FLORIDA

* UNTIL 215 PM EST

* AT 120 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF SEVERE THUNDERSTORMS FROM LAKE HELEN TO WEKIVA SPRINGS
  ...MOVING EAST AT   40 MPH.

* SEVERE THUNDERSTORMS WILL BE...
  NEAR SANFORD...MIDWAY AND OSTEEN AT 130 PM
  NEAR NEW SMYRNA BEACH AND GENEVA AT 140 PM
  NEAR EDGEWATER AT 145 PM
  NEAR MAYTOWN AT 155 PM

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. IF
THE STORM APPROACHES YOU...MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR.

LAT...LON 2907 8090 2883 8076 2875 8100 2871 8144
          2907 8120

$$

The office that day

Everything else NWS Melbourne, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 7, 12:09 PM ESTSevere Thunderstorm WarningMLBLake, Volusia66 min
Mar 7, 12:15 PM ESTSpecial Marine WarningMLB2 hr
Mar 7, 2:00 PM ESTSpecial Marine WarningMLB90 min

Nearby

Severe Thunderstorm Warnings in Florida, 2003Every severe thunderstorm warning in 2003

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.