Alert archive / Florida / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 6, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Feb 2, 1998, 6:25 PM EST for Collier County, Monroe County, Florida. It was in force for 95 min. 5 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
- Feb 2, 1998, 6:25 PM EST (23:25 UTC)
- Expired
- Feb 2, 1998, 8:00 PM EST
- In force
- 95 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
Counties Collier County, FL, Monroe County, FL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 2, 6:45 PM EST | Hail 1.75 | Marathon, FL | Golf ball size hail. Several trees blown down. |
| Feb 2, 6:47 PM EST | Tornado F1 | Marathon, FL | Tornado moved from south across Grassy Key near MM 56.5. |
| Feb 2, 7:10 PM EST | Tornado F0 | Islamorada, FL | Tornado moved from the south across Islamorada near MM 80. Extensive damage to homes and businesses. Widespread tree and vegetation loss. |
| Feb 2, 7:52 PM EST | Thunderstorm Wind 73 | Key Largo, FL | Recorded at C-MAN MLRF. |
| Feb 2, 8:00 PM EST | Thunderstorm Wind 104 | Long Key, FL | Recorded at C-MAN LONF1. Not reported in real time as primary sensor blew away and was found down the beach. |
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 |
|---|---|---|---|
| Feb 2, 2:00 PM EST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Miami, FL (KMFL), launched 12:00Z, 11.4 hours before the alert went out and 86 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
- 121 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 715 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 176 m²/s²
- 0-3 km storm-relative helicity
- 279 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
203 WUUS1 KMIA 022326 RRA SVRMIA FLC021-087-030100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 625 PM EST MON FEB 2 1998 THE NATIONAL WEATHER SERVICE IN MIAMI FL HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 800 PM EST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWESTERN FLORIDA ...COLLIER COUNTY ...MONROE MAINLAND AT 623 PM EST... DOPPLER RADAR INDICATED AN AREA OF VERY STRONG TO SEVERE THUNDERSTORMS FROM NEAR THE LOWER KEYS NORTHEAST ACROSS THE EASTERN GULF INTO MAINLAND MONROE AND SOUTHERN COLLIER COUNTY. THE THUNDERSTORMS WERE MOVING NORTH NORTHEAST AT 45 TO 50 MPH. IF YOU ARE CAUGHT OUTSIDE...SEEK REFUGE FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. 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.
The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 2, 3:32 PM EST | Tornado Warning | MFL | Monroe | 118 min |
| Feb 2, 3:51 PM EST | Tornado Warning | MFL | Monroe | 119 min |
| Feb 2, 4:16 PM EST | Severe Thunderstorm Warning | MFL | Monroe | 59 min |
| Feb 2, 4:54 PM EST | Severe Thunderstorm Warning | MFL | Collier, Monroe | 91 min |
| Feb 2, 5:27 PM EST | Severe Thunderstorm Warning | MFL | Monroe | 93 min |
| Feb 2, 5:38 PM EST | Severe Thunderstorm Warning | MFL | Miami-Dade | 57 min |
| Feb 2, 6:00 PM EST | Tornado Warning | MFL | Monroe | 65 min |
| Feb 2, 6:19 PM EST | Severe Thunderstorm Warning | MFL | Broward | 61 min |
| Feb 2, 6:39 PM EST | Severe Thunderstorm Warning | MFL | Miami-Dade | 61 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.