Alert archive / Florida / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 6, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Jan 3, 1999, 2:37 AM EST for Monroe County, Florida. It was in force for 53 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
- Jan 3, 1999, 2:37 AM EST (07:37 UTC)
- Expired
- Jan 3, 1999, 3:30 AM EST
- In force
- 53 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Monroe County, FL
The radar
The Miami radar (KAMX), 51 km from the middle of the area, began a volume at 07:38 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 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, 7.6 hours before the alert went out and 69 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, Jan 2, 10:00 PM EST, 4 hours 37 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, 4 hours 37 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, 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, 3:40 AM EST | Severe Thunderstorm Warning | MFL | Broward, Miami-Dade, Palm Beach | 40 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.