Alert archive / Florida / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 4, NWS Key West, FL

August 27, 2000Monroe County, Florida

NWS Key West, FL issued this severe thunderstorm warning at Aug 27, 2000, 5:30 AM EDT for Monroe County, Florida. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 27, 2000, 5:30 AM EDT (09:30 UTC)
Expired
Aug 27, 2000, 6:00 AM EDT
In force
30 min
Issued by
NWS Key West, FL
Area
Whole counties

County Monroe County, FL

The radar

The Miami radar (KAMX), 51 km from the middle of the area, began a volume at 09:31 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 00:00Z, 9.5 hours before the alert went out and 69 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 00:00Z on 2000-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2481 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 00:00Z on 2000-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -74 square meters per square second.1939Sfc1 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
2481 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
691 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-74 m²/s²
0-3 km storm-relative helicity
-87 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.

000 
WUUS52 KEYW 270935
SVREYW
FLC087-271000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KEY WEST FL
530 AM EDT SUN AUG 27 2000

THE NATIONAL WEATHER SERVICE IN KEY WEST HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  IN SOUTHERN FLORIDA...THE UPPER KEYS IN MONROE COUNTY
  AND ADJACENT COASTAL WATERS

* UNTIL 600 AM EDT

* AT 531 AM EDT... DOPPLER RADAR DETECTED A LINE OF FAST MOVING
  SHOWERS AND THUNDERSTORMS...MOVING RAPIDLY NORTHWEST OVER ATLANTIC
  WATERS TOWARD THE UPPER KEYS.

* THE LEADING EDGE OF THESE STORMS WILL BRING STRONG WIND GUSTS TO
ISLAND LOCATIONS OF THE UPPER KEYS...ESPECIALLY OCEAN REEF AND NORTH
KEY LARGO...BETWEEN 535 AND 600 AM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...AND
VERY HEAVY RAIN. SEEK SHELTER IN A STRONG BUILDING. STAY AWAY FROM
WINDOWS.

NNNN



TB

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 11:22 PM EDTSevere Thunderstorm WarningKEYMonroe68 min

Nearby

Severe Thunderstorm Warnings in Florida, 2000Every severe thunderstorm warning in 2000

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.