Alert archive / Florida / Tornado Watches in 1999

Tornado Watch 701

October 15, 199911 counties in Florida

The Storm Prediction Center issued this tornado watch at Oct 15, 1999, 8:30 AM EDT for 11 counties in Florida. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Oct 15, 1999, 8:30 AM EDT (12:30 UTC)
Expired
Oct 15, 1999, 3:00 PM EDT
In force
7 hr
Issued by
the Storm Prediction Center

Counties Broward County, FL, Collier County, FL, Glades County, FL, Hendry County, FL, Highlands County, FL, Martin County, FL, Miami-Dade County, FL, Monroe County, FL, Okeechobee County, FL, Palm Beach County, FL, Saint Lucie County, FL

The radar

The Miami radar (KAMX), 57 km from the middle of the area, began a volume at 12:30 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.

Warnings issued inside it

11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Oct 15, 8:31 AM EDTFlash Flood WarningMFLMiami-Dade2 hr
Oct 15, 10:00 AM EDTFlash Flood WarningKEYMonroe3 hr
Oct 15, 10:29 AM EDTFlash Flood WarningMFLBroward116 min
Oct 15, 10:29 AM EDTFlash Flood WarningMFLMiami-Dade, Monroe116 min
Oct 15, 10:42 AM EDTFlash Flood WarningMFLBroward, Miami-Dade103 min
Oct 15, 10:42 AM EDTFlash Flood WarningMFLMonroe103 min
Oct 15, 12:30 PM EDTFlash Flood WarningMFLBroward, Collier, Miami-Dade, Monroe3 hr
Oct 15, 12:30 PM EDTFlash Flood WarningMFLPalm Beach3 hr
Oct 15, 2:20 PM EDTFlash Flood WarningKEYMonroe3 hr
Oct 15, 2:41 PM EDTFlash Flood WarningMFLBroward, Collier, Miami-Dade, Palm Beach3 hr
Oct 15, 2:41 PM EDTFlash Flood WarningMFLMonroe3 hr

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 0.5 hours before the alert went out and 67 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 1999-10-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 13 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 1999-10-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 214 square meters per square second.193958Sfc1 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
13 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
766 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
214 m²/s²
0-3 km storm-relative helicity
271 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

Nearby

Tornado Watches in Florida, 1999Every tornado watch in 1999

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.