Alert archive / Florida / Tornado Warnings in 1998
Tornado Warning 31, NWS Miami, FL
NWS Miami, FL issued this tornado warning at Nov 4, 1998, 4:39 PM EST for Monroe County, Florida. It was in force for 46 min. 2 reports 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
- Nov 4, 1998, 4:39 PM EST (21:39 UTC)
- Expired
- Nov 4, 1998, 5:25 PM EST
- In force
- 46 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
County Monroe County, FL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Nov 4, 4:40 PM EST | Thunderstorm Wind 50 | Marathon, FL | A severe thunderstorm wind gust reported in Marathon but doing no known damage. |
| Nov 4, 5:15 PM EST | Tornado F1 | Islamorada, FL | A tornado moved ashore from the Straits of Florida into the middle Keys near mile marker 80. It travelled in a northeast direction crossing to the west side of U.S. 1. Damage occurred to the roof of a motel and to trees, fences and power lines. |
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 |
|---|---|---|---|
| Nov 4, 12:30 PM EST | Tornado Watch | SPC | 12 hr |
The nearest sounding before it
Miami, FL (KMFL), launched 12:00Z, 9.7 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
- 715 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 738 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
832
WFUS1 KMIA 042140 RRA
TORMIA
FLC087-042225-
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIAMI FL
439 PM EST WED NOV 4 1998
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
* TORNADO WARNING FOR...
MONROE MIDDLE KEYS IN SOUTHERN FLORIDA
* UNTIL 525 PM EST
* AT 435 PM...WEATHER RADAR INDICATED A TORNADO ABOUT 12 MILES
SOUTHWEST OF LAYTON. THE MOVEMENT WILL BE TO THE NORTHEAST AT
35 KT AND SHOULD REACH LAYTON BY 450 PM.
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS UNDER
STURDY FURNITURE IN AN INTERIOR ROOM ON THE LOWEST FLOOR. USE
PILLOWS TO PROTECT YOUR HEAD. AVOID WINDOWS. A MOBILE HOME IS NOT A
SAFE REFUGE FROM A TORNADO. MOVE TO A MORE SUBSTANTIAL BUILDING. DO
NOT TRY TO OUTRUN A TORNADO IN YOUR VEHICLE.The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 4, 3:51 PM EST | Tornado Warning | MFL | Palm Beach | 59 min |
| Nov 4, 5:24 PM EST | Tornado Warning | MFL | Monroe | 46 min |
| Nov 4, 6:08 PM EST | Tornado Warning | MFL | Monroe | 32 min |
| Nov 4, 6:41 PM EST | Tornado Warning | MFL | Monroe | 34 min |
| Nov 4, 6:53 PM EST | Tornado Warning | MFL | Miami-Dade | 47 min |
Nearby
Tornado Warnings in Florida, 1998Every tornado warning in 1998Tornadoes 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.