Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 40, NWS Melbourne, FL

November 5, 2021Martin County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Nov 5, 2021, 1:46 AM EDT for Martin County, Florida. It was in force for 39 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: Nov 5, 2021, 1:46 AM EDT (05:46 UTC)
Expired: Nov 5, 2021, 2:25 AM EDT
In force: 39 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Martin County, FL

The radar

The Melbourne radar (KMLB), 125 km from the middle of the area, began a volume at 05:45 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 nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 5.8 hours before the alert went out and 136 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: 612 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 925 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

013 
WUUS52 KMLB 050546
SVRMLB
FLC085-050645-
/O.NEW.KMLB.SV.W.0040.211105T0546Z-211105T0645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
146 AM EDT Fri Nov 5 2021

The National Weather Service in Melbourne has issued a

* Severe Thunderstorm Warning for...
  Southeastern Martin County in east central Florida...

* Until 245 AM EDT.

* At 145 AM EDT, a severe thunderstorm was located 7 miles south of
  Indiantown, moving northeast at 20 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of
  southeastern Martin County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 2712 8023 2696 8015 2696 8056
TIME...MOT...LOC 0545Z 242DEG 17KT 2691 8044 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Weitlich

2 follow-up statements

843 
WWUS52 KMLB 050608
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
208 AM EDT Fri Nov 5 2021

FLC085-050645-
/O.CON.KMLB.SV.W.0040.000000T0000Z-211105T0645Z/
Martin FL-
208 AM EDT Fri Nov 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM EDT
FOR SOUTHEASTERN MARTIN COUNTY...

At 207 AM EDT, a severe thunderstorm was located 9 miles southeast of
Indiantown, moving northeast at 20 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe thunderstorm will remain over mainly rural areas of
southeastern Martin County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 2712 8023 2696 8015 2696 8045 2701 8046
TIME...MOT...LOC 0607Z 242DEG 17KT 2696 8033 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Weitlich

309 
WWUS52 KMLB 050625
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
225 AM EDT Fri Nov 5 2021

FLC085-050633-
/O.CAN.KMLB.SV.W.0040.000000T0000Z-211105T0645Z/
Martin FL-
225 AM EDT Fri Nov 5 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARTIN COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened. 
Therefore, the warning has been cancelled.  However small hail and 
gusty winds are still possible with this thunderstorm.

LAT...LON 2712 8023 2696 8015 2696 8045 2701 8046
TIME...MOT...LOC 0621Z 242DEG 17KT 2700 8025 

$$

Weitlich

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 5, 2:27 AM EDT	Special Weather Statement	MLB	Martin	48 min
Nov 5, 3:39 AM EDT	Rip Current Statement	MLB	Volusia	6 days
Nov 5, 4:16 AM EDT	Gale Watch	MLB		11 hr
Nov 5, 4:16 AM EDT	Small Craft Advisory	MLB		6 days
Nov 5, 6:08 AM EDT	Areal Flood Advisory	MLB	Volusia	82 min
Nov 5, 2:13 PM EDT	Special Marine Warning	MLB		62 min
Nov 5, 2:56 PM EDT	Gale Warning	MLB		49 hr
Nov 5, 4:39 PM EDT	Special Marine Warning	MLB		96 min
Nov 5, 4:56 PM EDT	Wind Advisory	MLB	Volusia	31 hr
Nov 5, 4:57 PM EDT	Areal Flood Warning	MLB	Volusia	2 hr
Nov 5, 7:00 PM EDT	Areal Flood Warning	MLB	Volusia	2 hr

Nearby

Severe Thunderstorm Warnings in Florida, 2021 Every severe thunderstorm warning in 2021

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.