Alert archive / Florida / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 66, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Jul 4, 1998, 3:18 PM EDT for Miami-Dade County, Florida. It was in force for 57 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
- Jul 4, 1998, 3:18 PM EDT (19:18 UTC)
- Expired
- Jul 4, 1998, 4:15 PM EDT
- In force
- 57 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 19:21 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, 7.3 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.
- Mixed-layer CAPE
- 1054 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 1476 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
076 WUUS1 KMIA 041920 RRA SVRMIA FLC025-042015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 318 PM EDT SAT JUL 4 1998 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN DADE COUNTY IN SOUTHEASTERN FLORIDA * UNTIL 415 PM EDT * MIAMI DOPPLER RADAR HAS DETECTED A SEVERE THUNDERSTORM SOUTH OF WEST CHESTER IN WEST CENTRAL DADE COUNTY. THE STORM WAS MOVING SOUTH AT 15 MPH. FREQUENT LIGHTNING... HEAVY RAIN...STRONG WIND GUSTS...AND HAIL ARE POSSIBLE WITH THIS STORM. * SOME LOCATIONS AFFECTED WILL BE KENDALL...RICHMOND HEIGHTS... PERRINE...CUTLER RIDGE...SAGA BAY...AND GOULDS WITHIN THE NEXT HOUR. 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
Special weather statement, Jul 4, 9:55 AM EDT, 5 hours 23 minutes before
AMZ610-630-631-650>654-656-670>676-FLZ063-066>078-042200- SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK...UPDATE... NATIONAL WEATHER SERVICE MIAMI FL 955 AM EDT SAT JUL 04 1998 ...WIDELY SCATTERED SHOWERS AND THUNDERSTORMS ACROSS SOUTH FLORIDA TODAY MAINLY INLAND AND WEST WITH POSSIBLE HAIL... ...HAZY SMOKEY SKIES ACROSS THE SOUTH FLORIDA TODAY... ...HEAT INDICES ABOVE 105 THIS AFTERNOON OVER SOUTH FLORIDA... WIDELY SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS SOUTH FLORIDA TODAY MAINLY OVER THE INLAND AND WEST PORTIONS. SOME OF THESE THUNDERSTORMS...WHICH WILL DEVELOP DURING THE LATE AFTERNOON HOURS ALONG THE SEABREEZE FRONT...MAY PRODUCE LOCALLY HEAVY RAINFALL EXCEEDING ONE INCH ALONG WITH GUSTY WINDS AND POSSIBLE HAIL. SMOKE FROM THE FIRES IN EAST CENTRAL FLORIDA IS NOW OVER THE BAHAMAS ...THE FLORIDA STRAITS...ANDS SOUTH FLORIDA. VISIBILITIES HAVE BEEN REPORTED TO BE AS LOW AS 1 MILE AT FREEPORT IN THE BAHAMAS AND EVEN IN HAVANA CUBA. AREAS ON THE PENINSULA NEAR LAKE OKEECHOBEE INCLUDING WEST PALM BEACH HAS HAD VISIBILITIES LOWERED TO LESS THAN 3 MILES. CURRENTLY THE MOST DENSE SMOKE IS OVER THE ATLANTIC BUT SHIFTING UPPER LEVEL WINDS COMBINED WITH THE AFTERNOON SEA BREEZE WILL BRING LOWER VISIBILITY OVER THE REMAINDER OF SOUTH FLORIDA AND INTO THE KEYS. TEMPERATURES WILL CLIMB INTO THE MID AND UPPER 90S ACROSS SOUTH FLORIDA THIS AFTERNOON. HUMIDITIES AROUND 50 PERCENT WILL PRODUCE HEAT INDICES BETWEEN 105 AND 110 DEGREES OVER INTERIOR SECTIONS.
Special weather statement, Jul 4, 9:55 AM EDT, 5 hours 23 minutes before
AMZ610-630-631-650>654-656-670>676-FLZ063-066>078-042200- SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK...UPDATE... NATIONAL WEATHER SERVICE MIAMI FL 955 AM EDT SAT JUL 04 1998 ...WIDELY SCATTERED SHOWERS AND THUNDERSTORMS ACROSS SOUTH FLORIDA TODAY MAINLY INLAND AND WEST WITH POSSIBLE HAIL... ...HAZY SMOKEY SKIES ACROSS THE SOUTH FLORIDA TODAY... ...HEAT INDICES ABOVE 105 THIS AFTERNOON OVER SOUTH FLORIDA... WIDELY SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS SOUTH FLORIDA TODAY MAINLY OVER THE INLAND AND WEST PORTIONS. SOME OF THESE THUNDERSTORMS...WHICH WILL DEVELOP DURING THE LATE AFTERNOON HOURS ALONG THE SEABREEZE FRONT...MAY PRODUCE LOCALLY HEAVY RAINFALL EXCEEDING ONE INCH ALONG WITH GUSTY WINDS AND POSSIBLE HAIL. SMOKE FROM THE FIRES IN EAST CENTRAL FLORIDA IS NOW OVER THE BAHAMAS ...THE FLORIDA STRAITS...ANDS SOUTH FLORIDA. VISIBILITIES HAVE BEEN REPORTED TO BE AS LOW AS 1 MILE AT FREEPORT IN THE BAHAMAS AND EVEN IN HAVANA CUBA. AREAS ON THE PENINSULA NEAR LAKE OKEECHOBEE INCLUDING WEST PALM BEACH HAS HAD VISIBILITIES LOWERED TO LESS THAN 3 MILES. CURRENTLY THE MOST DENSE SMOKE IS OVER THE ATLANTIC BUT SHIFTING UPPER LEVEL WINDS COMBINED WITH THE AFTERNOON SEA BREEZE WILL BRING LOWER VISIBILITY OVER THE REMAINDER OF SOUTH FLORIDA AND INTO THE KEYS. TEMPERATURES WILL CLIMB INTO THE MID AND UPPER 90S ACROSS SOUTH FLORIDA THIS AFTERNOON. HUMIDITIES AROUND 50 PERCENT WILL PRODUCE HEAT INDICES BETWEEN 105 AND 110 DEGREES OVER INTERIOR SECTIONS.
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 3:00 PM EDT | Severe Thunderstorm Warning | MFL | Collier | 65 min |
| Jul 4, 4:58 PM EDT | Severe Thunderstorm Warning | MFL | Monroe | 47 min |
| Jul 4, 6:18 PM EDT | Severe Thunderstorm Warning | MFL | Miami-Dade | 47 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.