Alert archive / Florida / Tornado Warnings in 1997

Tornado Warning 11, NWS Miami, FL

May 12, 1997Collier County, Hendry County, Florida

NWS Miami, FL issued this tornado warning at May 12, 1997, 12:10 PM EDT for Collier County, Hendry County, Florida. It was in force for 60 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
May 12, 1997, 12:10 PM EDT (16:10 UTC)
Expired
May 12, 1997, 1:10 PM EDT
In force
60 min
Issued by
NWS Miami, FL
Area
Whole counties

Counties Collier County, FL, Hendry County, FL

The radar

The Miami radar (KAMX), 117 km from the middle of the area, began a volume at 16:22 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
May 12, 12:00 PM EDTTornado WatchSPC5 hr

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 4.2 hours before the alert went out and 113 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 1997-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 913 joules per kilogram.LCLEL10008507005003002001001 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 1997-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
913 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
733 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMIA 121610 RRA
TORMIA
FLC021-051-121710-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIAMI FL
1210 PM EDT MON MAY 12 1997

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 110 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWEST FLORIDA

   ...NORTHEASTERN COLLIER

IN SOUTH FLORIDA

   ...SOUTHEASTERN HENDRY
 
AT 1205 PM EDT...A POSSIBLE TORNADO WAS INDICATED BY MIAMI DOPPLER
RADAR NORTH OF ALLIGATOR ALLEY IN EXTREME NORTHEASTERN COLLIER COUNTY
THIS STORM WILL MOVE NORTHEAST AT 15 MPH ACROSS BIG CYPRESS SEMINOLE
INDIAN RESERVATION DURING THE NEXT HOUR.

IF YOU ARE CAUGHT OUTSIDE AND SPOT A TORNADO...SEEK SAFETY IN A
NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK REFUGE IN A
CULVERT...DITCH OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 1:55 PM EDTTornado WarningMFLMiami-Dade65 min
May 12, 2:15 PM EDTTornado WarningMFLBroward60 min
May 12, 3:20 PM EDTSevere Thunderstorm WarningMFLBroward55 min

Nearby

Tornado Warnings in Florida, 1997Every tornado warning in 1997Tornadoes in 1997

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.