Alert archive / Florida / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 87, NWS Melbourne, FL

July 25, 2003Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 25, 2003, 6:33 PM EDT for Osceola County, Florida. It was in force for 42 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: Jul 25, 2003, 6:33 PM EDT (22:33 UTC)
Expired: Jul 25, 2003, 7:15 PM EDT
In force: 42 min
Issued by: NWS Melbourne, FL
Area: Counties, with a storm outline in the text

County Osceola County, FL

The radar

The Melbourne radar (KMLB), 74 km from the middle of the area, began a volume at 22:33 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 10.6 hours before the alert went out and 93 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: 378 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 549 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 16 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.

209 
WUUS52 KMLB 252233
SVRMLB
FLC097-252315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
631 PM EDT FRI JUL 25 2003

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN OSCEOLA COUNTY
  IN EAST CENTRAL FLORIDA

* UNTIL 715 PM EDT

* AT 623 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM OVER WEST LAKE TOHO...MOVING NORTH AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  NEAR CAMPBELL...EAST LAKE TOHO AT 645 PM EDT
  NEAR KISSIMMEE AT 655 PM EDT

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.

EXCESSIVE LIGHTNING AND DAMAGING WINDS ARE LIKELY WITH THIS STORM. 
IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. 
MOVE INDOORS TO AN ENCLOSED BUILDING. PICNIC SHELTERS AND DUGOUTS 
MAY KEEP YOU DRY BUT THEY OFFER NO PROTECTION FROM THE DANGERS OF 
LIGHTNING. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID 
USING TELEPHONES UNLESS IT IS AN EMERGENCY.

LAT...LON 2811 8147 2813 8127 2835 8129 2834 8153

$$

28

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 7:47 AM EDT	Special Marine Warning	MLB		88 min
Jul 25, 3:09 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	51 min
Jul 25, 7:59 PM EDT	Tornado Warning	MLB	Okeechobee	31 min

Nearby

Severe Thunderstorm Warnings in Florida, 2003 Every 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.