Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 62, NWS Miami, FL

July 3, 1998Broward County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 3, 1998, 5:07 PM EDT for Broward County, Florida. It was in force for 33 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: Jul 3, 1998, 5:07 PM EDT (21:07 UTC)
Expired: Jul 3, 1998, 5:40 PM EDT
In force: 33 min
Issued by: NWS Miami, FL
Area: Whole counties

County Broward County, FL

The radar

The Miami radar (KAMX), 60 km from the middle of the area, began a volume at 21:10 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

Time	Report	Where	Remark
Jul 3, 5:11 PM EDT	Hail 1.75	Countywide, FL	Golf ball size hail was reported in Weston. Pea size hail was reported in Silver Lakes and Pembroke Pines.Most of the hail was west of I75.

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 12:00Z, 9.1 hours before the alert went out and 40 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 483 J/kg
Mixed-layer CIN: -206 J/kg
Mixed-layer LCL: 1598 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 19 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 
TTAA00 KMIA 032107 RRA
SVRMIA
FLC011-032140-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
507 PM EDT FRI JUL 3 1998

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL AND SOUTHERN BROWARD COUNTY IN SOUTHEASTERN FLORIDA

* UNTIL 540 PM EDT

* AT 504 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR THE INTERSECTION OF I-75 AND THE SAWGRASS
  EXPRESSWAY...AND JUST NORTH OF THE COMMUNITIES OF WESTON AND
  BONAVENTURE. THE STORM IS MOVING SOUTH AT 5 TO 10 MPH.

* SOME LOCATIONS AFFECTED WILL BE WESTON AND BONAVENTURE BY 515
  PM...AND DAVIE AND PEMBROKE PINES BY 525 PM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. SEEK SHELTER
IN A STRONG BUILDING. STAY AWAY FROM WINDOWS. DO NOT USE TELEPHONES
OR ELECTRICAL APPLIANCES.

IF YOU ARE CAUGHT OUTSIDE...SEEK REFUGE FROM THE WEATHER IN A
STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 6:04 PM EDT	Severe Thunderstorm Warning	MFL	Miami-Dade	46 min
Jul 3, 6:13 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	32 min

Nearby

Severe Thunderstorm Warnings in Florida, 1998 Every severe thunderstorm warning in 1998

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.