Alert archive / Florida / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 9, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Jan 3, 1999, 3:40 AM EST for Broward County, Miami-Dade County, Palm Beach County, Florida. It was in force for 40 min. 2 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Jan 3, 1999, 3:40 AM EST (08:40 UTC)
- Expired
- Jan 3, 1999, 4:20 AM EST
- In force
- 40 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Broward County, FL, Miami-Dade County, FL, Palm Beach County, FL
The radar
The Miami radar (KAMX), 72 km from the middle of the area, began a volume at 08:39 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 |
|---|---|---|---|
| Jan 3, 4:00 AM EST | Thunderstorm Wind 65 | Palm Beach Arpt, FL | Thunderstorm wind gusts damaged horse stalls and a pump house and destroyed five large tents at the Winter Equestrian Festival in Wellington. |
| Jan 3, 4:18 AM EST | Thunderstorm Wind 60 | Westchester, FL | Thunderstorm winds blew down trees in Westchester. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 3, 12:45 AM EST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Miami, FL (KMFL), launched 00:00Z, 8.7 hours before the alert went out and 52 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
- 1088 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 710 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.3
The text
As transmitted, in the capitals the NWS used until 2016.
999
WUUS1 KMIA 030842 RRA
SVRMIA
FLC011-025-099-030920-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
340 AM EST SUN JAN 3 1999
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
PALM BEACH COUNTY IN FLORIDA
DADE COUNTY IN FLORIDA
BROWARD COUNTY IN FLORIDA
* UNTIL 420 AM EST
* AT 339 AM EST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS EXTENDING FROM SOUTH OF BROWNS FARM
IN PALM BEACH COUNTY...ACROSS WESTERN BROWARD COUNTY TO JUST
NORTHWEST OF THE PA-HAY-OKEE LOOKOUT TOWER IN DADE COUNTY.
THE LINE OF STORMS WAS MOVING TOWARD THE EAST AT AROUND 30 MPH AND
SHOULD REACH THE METROPOLITAN AREAS OF DADE...BROWARD AND PALM BEACH
COUNTIES SHORTLY AFTER 4 AM.
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM EDT FOR FLORIDA.
REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN MIAMI.
LAT...LON 2682 8067 2516 8086 2554 8011 2696 7997What 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, Jan 2, 10:00 PM EST, 5 hours 40 minutes before
AMZ610-630-631-650>654-656-670>676-FLZ063-066>078-031100- SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MIAMI FL 1000 PM EST SAT JAN 2 1999 A LINE OF STRONG THUNDERSTORMS WILL MOVE RAPIDLY EAST ACROSS THE EASTERN GULF OF MEXICO TONIGHT. THIS LINE WILL MOVE INTO GLADES... HENDRY...AND COLLIER COUNTIES AFTER 100 AM SUNDAY MORNING. THE MAIN THREAT FROM THESE STORMS WILL BE STRONG WIND GUSTS AND DEADLY LIGHTNING. SOME OF THESE STORMS MAY REACH SEVERE LIMITS DURING THE EARLY MORNING HOURS AND ISOLATED TORNADOES ARE POSSIBLE. THESE STORMS WILL PROGRESS EAST ACROSS THE AREA REACHING THE FLORIDA KEYS AND WESTERN SECTIONS OF DADE...BROWARD AND PALM BEACH COUNTIES AFTER 200 AM AND THE METROPOLITAN AREAS AFTER 300 AM. ALTHOUGH STORMS MAY BEGIN TO WEAKEN AS THIS LINE MOVES EASTWARD...RESIDENTS SHOULD REMAIN ALERT TO THE POTENTIAL FOR SEVERE WEATHER OVERNIGHT TONIGHT AND BE PREPARED TO TAKE IMMEDIATE ACTION IF A WARNING IS ISSUED. THOSE WHO OWN NOAA WEATHER RADIOS WITH THE TONE ALERT FEATURE SHOULD MAKE SURE THE ALERT IS SET TO ON BEFORE GOING TO BED TONIGHT. STORM SPOTTER ACTIVATION IS REQUESTED AT THIS TIME. ALSO...FLOOD WATERS IN NORTHEASTERN PALM BEACH COUNTY ARE RECEDING AND MINIMAL RAINFALL AMOUNTS OF AROUND ONE QUARTER OF AN INCH ARE EXPECTED UNTIL THE SQUALL LINE ARRIVES. THE FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 1005 PM. HOWEVER...LOCAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE WITH THUNDERSTORMS SUNDAY MORNING AND RESIDENTS SHOULD BE ALERT FOR ADDITIONAL FLOODING SHOULD THIS OCCUR. CARROLL
Special weather statement, Jan 2, 10:00 PM EST, 5 hours 40 minutes before
AMZ610-630-631-650>654-656-670>676-FLZ063-066>078-031100- SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MIAMI FL 1000 PM EST SAT JAN 2 1999 A LINE OF STRONG THUNDERSTORMS WILL MOVE RAPIDLY EAST ACROSS THE EASTERN GULF OF MEXICO TONIGHT. THIS LINE WILL MOVE INTO GLADES... HENDRY...AND COLLIER COUNTIES AFTER 100 AM SUNDAY MORNING. THE MAIN THREAT FROM THESE STORMS WILL BE STRONG WIND GUSTS AND DEADLY LIGHTNING. SOME OF THESE STORMS MAY REACH SEVERE LIMITS DURING THE EARLY MORNING HOURS AND ISOLATED TORNADOES ARE POSSIBLE. THESE STORMS WILL PROGRESS EAST ACROSS THE AREA REACHING THE FLORIDA KEYS AND WESTERN SECTIONS OF DADE...BROWARD AND PALM BEACH COUNTIES AFTER 200 AM AND THE METROPOLITAN AREAS AFTER 300 AM. ALTHOUGH STORMS MAY BEGIN TO WEAKEN AS THIS LINE MOVES EASTWARD...RESIDENTS SHOULD REMAIN ALERT TO THE POTENTIAL FOR SEVERE WEATHER OVERNIGHT TONIGHT AND BE PREPARED TO TAKE IMMEDIATE ACTION IF A WARNING IS ISSUED. THOSE WHO OWN NOAA WEATHER RADIOS WITH THE TONE ALERT FEATURE SHOULD MAKE SURE THE ALERT IS SET TO ON BEFORE GOING TO BED TONIGHT. STORM SPOTTER ACTIVATION IS REQUESTED AT THIS TIME. ALSO...FLOOD WATERS IN NORTHEASTERN PALM BEACH COUNTY ARE RECEDING AND MINIMAL RAINFALL AMOUNTS OF AROUND ONE QUARTER OF AN INCH ARE EXPECTED UNTIL THE SQUALL LINE ARRIVES. THE FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 1005 PM. HOWEVER...LOCAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE WITH THUNDERSTORMS SUNDAY MORNING AND RESIDENTS SHOULD BE ALERT FOR ADDITIONAL FLOODING SHOULD THIS OCCUR. CARROLL
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 3, 1:01 AM EST | Severe Thunderstorm Warning | MFL | Collier | 29 min |
| Jan 3, 1:07 AM EST | Severe Thunderstorm Warning | MFL | Glades | 38 min |
| Jan 3, 1:28 AM EST | Severe Thunderstorm Warning | MFL | Collier | 47 min |
| Jan 3, 1:42 AM EST | Severe Thunderstorm Warning | MFL | Glades | 48 min |
| Jan 3, 2:14 AM EST | Severe Thunderstorm Warning | MFL | Collier, Hendry | 46 min |
| Jan 3, 2:37 AM EST | Severe Thunderstorm Warning | MFL | Monroe | 53 min |
| Jan 3, 3:00 AM EST | Severe Thunderstorm Warning | MFL | Broward, Collier, Hendry, Palm Beach | 45 min |
| Jan 3, 3:00 AM EST | Severe Thunderstorm Warning | MFL | Miami-Dade | 45 min |
| Jan 3, 4:20 AM EST | Severe Thunderstorm Warning | MFL | Broward, Miami-Dade | 40 min |
| Jan 3, 4:20 AM EST | Severe Thunderstorm Warning | MFL | Palm Beach | 40 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1999Every severe thunderstorm warning in 1999
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.