Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 81, NWS Miami, FL

August 5, 1998Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Aug 5, 1998, 2:25 PM EDT for Miami-Dade County, Florida. It was in force for 45 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 5, 1998, 2:25 PM EDT (18:25 UTC)
Expired
Aug 5, 1998, 3:10 PM EDT
In force
45 min
Issued by
NWS Miami, FL
Area
Whole counties

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 9 km from the middle of the area, began a volume at 18:27 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 12:00Z, 6.4 hours before the alert went out and 31 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 1998-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1626 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 1998-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 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
1626 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
953 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
-16 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.

289 
WUUS1 KMIA 051826 RRA
SVRMIA
FLC025-051910-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
225 PM EDT WED AUG 5 1998

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN DADE COUNTY IN SOUTHEASTERN FLORIDA

* UNTIL 310 PM EDT

 A SEVERE THUNDERSTORM WAS INDICATED BY RADAR CENTERED JUST SOUTH OF
MIAMI INTERNATIONAL AIRPORT.  THIS STORM COULD PRODUCE SEVERE
WEATHER CONDITIONS FROM SOUTHERN HIALEAH THROUGH VIRGINIA GARDENS TO
SWEETWATER DURING THE NEXT HOUR.

WHEN THUNDERSTORMS ARE OCCURRING...MOVE INSIDE A STRONG BUILDING.
DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL
APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED.
MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

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.

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, Aug 5, 10:30 AM EDT, 3 hours 55 minutes before
PRELIMINARY LOCAL STORM REPORT...CHANGED TIMES TO EDT
NATIONAL WEATHER SERVICE MIAMI FL
1030 AM EDT WED AUG 05 1998

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

0448 PM    WESTON                    FL   70 MPH TSTM GUST
08/04/98   BROWARD                        ESTIMATED WIND. TREES
                                          DOWN. N OF WESTON NEAR
                                          I-595.

0455 PM    PLANTATION                FL
08/04/98   BROWARD                        FUNNEL CLOUD AT I-595 AND
                                          NOB HILL ROAD.

0546 PM    PEMBROKE PINES            FL   60 MPH TSTM GUST
08/04/98   BROWARD                        ESTIMATED WIND. JUST
                                          EAST OF US 27 AND PINES
                                          BLVD. NO DAMAGE. ALSO
                                          REPORTED A FUNNEL CLOUD.

0550 PM    DAVIE                     FL
08/04/98   BROWARD                        FUNNEL CLOUD OVER US 441
                                          AND I-595.

0603 PM    WESTON                    FL   .88 INCH HAIL
08/04/98   BROWARD                        NICKEL-SIZED HAIL AT I-75
                                          AND ARVIDA PARKWAY.
                                          RELAYED BY WSVN CHANNEL 7.
Local storm report, Aug 5, 10:30 AM EDT, 3 hours 55 minutes before
PRELIMINARY LOCAL STORM REPORT...CHANGED TIMES TO EDT
NATIONAL WEATHER SERVICE MIAMI FL
1030 AM EDT WED AUG 05 1998

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

0448 PM    WESTON                    FL   70 MPH TSTM GUST
08/04/98   BROWARD                        ESTIMATED WIND. TREES
                                          DOWN. N OF WESTON NEAR
                                          I-595.

0455 PM    PLANTATION                FL
08/04/98   BROWARD                        FUNNEL CLOUD AT I-595 AND
                                          NOB HILL ROAD.

0546 PM    PEMBROKE PINES            FL   60 MPH TSTM GUST
08/04/98   BROWARD                        ESTIMATED WIND. JUST
                                          EAST OF US 27 AND PINES
                                          BLVD. NO DAMAGE. ALSO
                                          REPORTED A FUNNEL CLOUD.

0550 PM    DAVIE                     FL
08/04/98   BROWARD                        FUNNEL CLOUD OVER US 441
                                          AND I-595.

0603 PM    WESTON                    FL   .88 INCH HAIL
08/04/98   BROWARD                        NICKEL-SIZED HAIL AT I-75
                                          AND ARVIDA PARKWAY.
                                          RELAYED BY WSVN CHANNEL 7.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 3:26 PM EDTSevere Thunderstorm WarningMFLPalm Beach49 min
Aug 5, 4:01 PM EDTSevere Thunderstorm WarningMFLPalm Beach64 min
Aug 5, 5:06 PM EDTSevere Thunderstorm WarningMFLPalm Beach64 min

Nearby

Severe Thunderstorm Warnings in Florida, 1998Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.