Alert archive / Florida / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 10, NWS Miami, FL

March 31, 1996Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Mar 31, 1996, 7:01 PM EST for Palm Beach County, Florida. It was in force for 59 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Mar 31, 1996, 7:01 PM EST (00:01 UTC)
Expired
Mar 31, 1996, 8:00 PM EST
In force
59 min
Issued by
NWS Miami, FL
Area
Whole counties

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 115 km from the middle of the area, began a volume at 00:04 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.

What was reported inside it

TimeReportWhereRemark
Mar 31, 7:25 PM ESTHail 1.25(Pbi)Palm Beach Arpt, FL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 0.0 hours before the alert went out and 93 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 1996-04-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3269 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 1996-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
3269 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
824 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
2.1
Supercell composite
9.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMIA 010002
SVRMIA
FLC099-010100-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
701 PM EST SUN MAR 31 1996
 
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  800 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN SOUTHEAST FLORIDA
 
   ...SOUTHEASTERN PALM BEACH COUNTY
 
AND THE ADJACENT COASTAL WATERS ALONG THE SOUTHEAST FLORIDA COAST
AND THE ADJACENT COASTAL WATERS
 
DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM LOCATED 9 MILES WEST
OF DELRAY BEACH JUST WEST OF HIGHWAY 441. WINDS OF 50 MPH AND LARGE
HAIL CAN BE EXPECTED. THE STORM IS MOVING NORTHEAST AT 10 TO 15 MPH
AND WILL AFFECT SOUTHEAST PALM BEACH COUNTY DURING THE NEXT HOUR.
 
DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM. SEEK
SHELTER IN A STRONG BUILDING. STAY AWAY FROM WINDOWS. DO NOT USE
TELEPHONES OR ELECTRICAL APPLIANCES.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Mar 31, 5:46 PM EST, 1 hour 15 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MIAMI, FL
546 PM EST SUN MAR 31 1996

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0420 PM    MIAMI                     FL   LIGHTNING STRIKES PERSON ON
03/31/96   DADE                           MIAMI BEACH NEAR 20TH STREET.
                                          PERSON INITIALLY CLAIMED TO BE
                                          OK...THEN FELT SHAKEY AND CALLED
                                          PARAMEDICS

0425 PM    COCOUNT GROVE             FL   PEA SIZED HAIL REPORTED BY NOAA
03/31/96   DADE                           EMPLOYEE

0425 PM    COCONUT GROVE             FL   HAIL DIME SIZED DIAMETER REPORTED
03/31PORTED BY NOAA EMPLOYEE
                                          6945 SW 115 ST. (LUDLUM/KILLIAN)

                                                EBAUGH / HMSU
Local storm report, Mar 31, 5:46 PM EST, 1 hour 15 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MIAMI, FL
546 PM EST SUN MAR 31 1996

TIME(EST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0420 PM    MIAMI                     FL   LIGHTNING STRIKES PERSON ON
03/31/96   DADE                           MIAMI BEACH NEAR 20TH STREET.
                                          PERSON INITIALLY CLAIMED TO BE
                                          OK...THEN FELT SHAKEY AND CALLED
                                          PARAMEDICS

0425 PM    COCOUNT GROVE             FL   PEA SIZED HAIL REPORTED BY NOAA
03/31/96   DADE                           EMPLOYEE

0425 PM    COCONUT GROVE             FL   HAIL DIME SIZED DIAMETER REPORTED
03/31PORTED BY NOAA EMPLOYEE
                                          6945 SW 115 ST. (LUDLUM/KILLIAN)

                                                EBAUGH / HMSU

Nearby

Severe Thunderstorm Warnings in Florida, 1996Every severe thunderstorm warning in 1996

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.