Alert archive / Florida / Tornado Warnings in 2020

Tornado Warning 1, NWS Miami, FL

January 31, 2020Monroe County, Florida

NWS Miami, FL issued this tornado warning at Jan 31, 2020, 10:39 PM EST for Monroe County, Florida. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jan 31, 2020, 10:39 PM EST (03:39 UTC)
Expired: Jan 31, 2020, 11:12 PM EST
In force: 33 min
Issued by: NWS Miami, FL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Monroe County, FL

The radar

The Miami radar (KAMX), 62 km from the middle of the area, began a volume at 03:42 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 31, 8:01 PM EST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 3.7 hours before the alert went out and 83 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 76 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 991 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

171 
WFUS52 KMFL 010339
TORMFL
FLC087-010430-
/O.NEW.KMFL.TO.W.0001.200201T0339Z-200201T0430Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Miami FL
1039 PM EST Fri Jan 31 2020

The National Weather Service in Miami has issued a

* Tornado Warning for...
  Central Mainland Monroe County in southwestern Florida...

* Until 1130 PM EST.
    
* At 1038 PM EST, severe thunderstorms capable of producing a tornado
  were located along a line extending from 12 miles south of
  Wilderness Waterway to 11 miles northwest of Mahogany Hammock to 7
  miles north of Flamingo, moving east at 30 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Expect damage to mobile homes, roofs, and vehicles. Tree 
           damage is likely.

* These tornadic storms will remain over mainly rural areas of
  central Mainland Monroe County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Miami. You can also share your report with NWS Miami on Facebook and
Twitter.

This line of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 2532 8098 2541 8106 2545 8118 2552 8119
      2557 8111 2561 8095 2550 8087 2537 8087
      2536 8086 2526 8086 2526 8095
TIME...MOT...LOC 0338Z 262DEG 28KT 2547 8113 2544 8099 2525 8092 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Cohen/Winesett

2 follow-up statements

426 
WWUS52 KMFL 010352
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
1052 PM EST Fri Jan 31 2020

FLC087-010430-
/O.CON.KMFL.TO.W.0001.000000T0000Z-200201T0430Z/
Mainland Monroe FL-
1052 PM EST Fri Jan 31 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1130 PM EST FOR CENTRAL
MAINLAND MONROE COUNTY...
    
At 1051 PM EST, severe thunderstorms capable of producing tornadoes
were located along a line extending from 11 miles southeast of
Wilderness Waterway to 14 miles southwest of Shark Valley Obs Tower 
to near Pa-Hay-Okee Overlook to near Mahogany Hammock, moving 
northeast at 30 mph.

HAZARD...TORNADO.

SOURCE...Radar indicated rotation.

IMPACT...Expect damage to mobile homes, roofs, and vehicles. Tree 
         damage is likely.

These tornadic storms will remain over mainly rural areas of central
Mainland Monroe County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building and avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

This line of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 2535 8090 2545 8098 2548 8110 2554 8112
      2557 8111 2561 8095 2550 8087 2537 8087
      2536 8086 2534 8086
TIME...MOT...LOC 0351Z 224DEG 25KT 2552 8106 2552 8095 2545 8087 2539
8085

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Cohen/Winesett

411 
WWUS52 KMFL 010412 RRA
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
1112 PM EST Fri Jan 31 2020

FLC087-010422-
/O.CAN.KMFL.TO.W.0001.000000T0000Z-200201T0430Z/
Mainland Monroe FL-
1112 PM EST Fri Jan 31 2020

...THE TORNADO WARNING FOR CENTRAL MAINLAND MONROE COUNTY IS
CANCELLED...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 300 AM EST for
southeastern and southwestern Florida.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Miami.

LAT...LON 2535 8090 2545 8098 2548 8110 2554 8112
      2557 8111 2561 8095 2550 8087 2537 8087
      2536 8086 2534 8086
TIME...MOT...LOC 0410Z 262DEG 28KT 2554 8089 2554 8078 2547 8070 2541
8068

$$

Winesett

The office that day

Everything else NWS Miami, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 31, 8:13 PM EST	Special Marine Warning	MFL		2 hr
Jan 31, 9:42 PM EST	Areal Flood Advisory	MFL	Collier	3 hr
Jan 31, 9:57 PM EST	Severe Thunderstorm Warning	MFL	Collier, Monroe	78 min
Jan 31, 10:08 PM EST	Special Marine Warning	MFL		52 min
Jan 31, 10:23 PM EST	Special Weather Statement	MFL	Miami-Dade	22 min
Jan 31, 10:32 PM EST	Severe Thunderstorm Warning	MFL	Miami-Dade	73 min
Jan 31, 10:46 PM EST	Special Weather Statement	MFL	Miami-Dade	29 min
Jan 31, 10:49 PM EST	Special Marine Warning	MFL		116 min
Jan 31, 11:09 PM EST	Severe Thunderstorm Warning	MFL	Miami-Dade	96 min
Feb 1, 12:07 AM EST	Areal Flood Advisory	MFL	Miami-Dade	4 hr
Feb 1, 12:19 AM EST	Special Weather Statement	MFL	Miami-Dade	41 min
Feb 1, 12:25 AM EST	Special Marine Warning	MFL		113 min
Feb 1, 12:50 AM EST	Areal Flood Advisory	MFL	Broward	3 hr
Feb 1, 1:44 AM EST	Special Marine Warning	MFL		61 min
Feb 1, 1:58 AM EST	Special Marine Warning	MFL		62 min
Feb 1, 2:45 AM EST	Small Craft Advisory	MFL		38 hr
Feb 1, 11:56 AM EST	Special Weather Statement	MFL	Collier	34 min
Feb 1, 2:00 PM EST	Special Marine Warning	MFL		45 min

Nearby

Tornado Warnings in Florida, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.