Alert archive / Florida / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 5, NWS Key West, FL

April 30, 2003Monroe County, Florida

NWS Key West, FL issued this severe thunderstorm warning at Apr 30, 2003, 1:05 PM EDT for Monroe County, Florida. It was in force for 25 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
Apr 30, 2003, 1:05 PM EDT (17:05 UTC)
Expired
Apr 30, 2003, 1:30 PM EDT
In force
25 min
Issued by
NWS Key West, FL
Area
Counties, with a storm outline in the text

County Monroe County, FL

The radar

The Miami radar (KAMX), 61 km from the middle of the area, began a volume at 17:06 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

Miami, FL (KMFL), launched 12:00Z, 5.1 hours before the alert went out and 85 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, Miami, FL at 12:00Z on 2003-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1244 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, Miami, FL at 12:00Z on 2003-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.19395878Sfc1 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
1244 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
863 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.4
Supercell composite
6.1

Open this sounding in Storm Lab

The text

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

435 
WUUS52 KEYW 301705
SVREYW
FLC087-301730-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KEY WEST FL
103 PM EDT WED APR 30 2003

THE NATIONAL WEATHER SERVICE IN KEY WEST HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  UPPER KEYS IN MONROE COUNTY IN FLORIDA

* UNTIL 130 PM EDT

* AT 103 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A SEVERE THUNDERSTORM WITH DAMAGING WINDS DEVELOPING OVER
  PORTIONS OF THE UPPER KEYS...FROM TAVERNIER TO WHALE HARBOR...
  TO AROUND ISLAMORADA.

VERY HEAVY RAIN AND STRONG DAMAGING WINDS ARE LIKELY WITH THIS STORM.
TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES.

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.

LAT...LON 2519 8018 2522 8033 2491 8071 2478 8060

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 30, 6:27 AM EDTSpecial Marine WarningKEY63 min
Apr 30, 8:14 AM EDTSpecial Marine WarningKEY61 min
Apr 30, 9:16 AM EDTSpecial Marine WarningKEY119 min
Apr 30, 9:16 AM EDTSpecial Marine WarningKEY119 min
Apr 30, 11:00 AM EDTSpecial Marine WarningKEY2 hr
Apr 30, 11:00 AM EDTSpecial Marine WarningKEY2 hr
Apr 30, 12:01 PM EDTSpecial Marine WarningKEY119 min
Apr 30, 1:00 PM EDTSpecial Marine WarningKEY2 hr
Apr 30, 1:00 PM EDTSpecial Marine WarningKEY2 hr
Apr 30, 2:00 PM EDTSpecial Marine WarningKEY2 hr
Apr 30, 3:00 PM EDTSpecial Marine WarningKEY2 hr
Apr 30, 3:00 PM EDTSpecial Marine WarningKEY2 hr
Apr 30, 5:00 PM EDTSpecial Marine WarningKEY60 min
Apr 30, 5:00 PM EDTSpecial Marine WarningKEY60 min
Apr 30, 6:00 PM EDTSpecial Marine WarningKEY60 min
Apr 30, 6:00 PM EDTSpecial Marine WarningKEY60 min
Apr 30, 6:00 PM EDTSpecial Marine WarningKEY60 min
Apr 30, 7:00 PM EDTSpecial Marine WarningKEY60 min
Apr 30, 7:00 PM EDTSpecial Marine WarningKEY60 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.