Alert archive / Florida / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 2, NWS Key West, FL

March 27, 2003Monroe County, Florida

NWS Key West, FL issued this severe thunderstorm warning at Mar 27, 2003, 5:05 PM EST for Monroe County, Florida. It was in force for 55 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 27, 2003, 5:05 PM EST (22:05 UTC)
Expired
Mar 27, 2003, 6:00 PM EST
In force
55 min
Issued by
NWS Key West, FL
Area
Counties, with a storm outline in the text

County Monroe County, FL

The radar

The Key West radar (KBYX), 8 km from the middle of the area, began a volume at 22:07 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 27, 2:15 PM ESTTornado WatchSPC5 hr

The nearest sounding before it

Key West, FL (KEYW), launched 12:00Z, 10.1 hours before the alert went out and 10 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, Key West, FL at 12:00Z on 2003-03-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 824 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, Key West, FL at 12:00Z on 2003-03-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 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
824 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
792 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
234 m²/s²
Significant tornado parameter
0.6
Supercell composite
4.2

Open this sounding in Storm Lab

The text

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

801 
WUUS52 KEYW 272205
SVREYW
FLC087-272300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KEY WEST FL
502 PM EST THU MAR 27 2003

THE NATIONAL WEATHER SERVICE IN KEY WEST HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LOWER KEYS IN MONROE COUNTY IN FLORIDA
  MIDDLE KEYS IN MONROE COUNTY IN FLORIDA

* UNTIL 600 PM EST

* AT 502 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF SEVERE THUNDERSTORMS WITH DAMAGING WINDS ALONG A LINE
  EXTENDING FROM 9 MILES NORTH OF BIG TORCH KEY TO 23 MILES WEST OF
  KEY WEST TO 27 MILES SOUTHWEST OF KEY WEST...OR ALONG A LINE
  EXTENDING FROM 25 MILES NORTHWEST OF MARATHON TO 23 MILES WEST OF
  KEY WEST TO 27 MILES SOUTHWEST OF KEY WEST...MOVING EAST AT 20 MPH.

* SOME LOCATIONS NEAR THE PATH OF THE STORM THROUGH 600 PM EST...
  KEY WEST
  BOCA CHICA AND STOCK ISLAND...
  UPPER SUGARLOAF KEY AND BIG TORCH KEY...
  CUDJOE KEY...
  SUGARLOAF KEY...
  MIDDLE TORCH KEY...
  SUMMERLAND KEY...
  SEVEN MILE BRIDGE...

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.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA UNTIL 7 PM.
REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR
NO ADVANCE WARNING.

LAT...LON 2492 8144 2445 8220 2431 8229 2429 8167
          2444 8159 2483 8074

$$

STRAHAN

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 27, 12:42 AM ESTSpecial Marine WarningKEY63 min
Mar 27, 1:20 AM ESTSpecial Marine WarningKEY60 min
Mar 27, 1:20 AM ESTSpecial Marine WarningKEY60 min
Mar 27, 2:20 AM ESTSpecial Marine WarningKEY40 min
Mar 27, 2:20 AM ESTSpecial Marine WarningKEY40 min
Mar 27, 2:20 AM ESTSpecial Marine WarningKEY40 min
Mar 27, 2:20 AM ESTSpecial Marine WarningKEY40 min
Mar 27, 2:20 AM ESTSpecial Marine WarningKEY40 min
Mar 27, 3:17 AM ESTSpecial Marine WarningKEY43 min
Mar 27, 6:37 AM ESTSpecial Marine WarningKEY68 min
Mar 27, 6:37 AM ESTSpecial Marine WarningKEY68 min
Mar 27, 7:32 AM ESTSpecial Marine WarningKEY58 min
Mar 27, 8:32 AM ESTSpecial Marine WarningKEY58 min
Mar 27, 9:27 AM ESTSpecial Marine WarningKEY63 min
Mar 27, 2:39 PM ESTSpecial Marine WarningKEY66 min
Mar 27, 4:40 PM ESTSpecial Marine WarningKEY65 min
Mar 27, 4:40 PM ESTSpecial Marine WarningKEY65 min
Mar 27, 5:35 PM ESTSpecial Marine WarningKEY55 min
Mar 27, 5:35 PM ESTSpecial Marine WarningKEY55 min
Mar 27, 6:25 PM ESTSpecial Marine WarningKEY65 min
Mar 27, 6:25 PM ESTSpecial Marine WarningKEY65 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.