Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 38, NWS Melbourne, FL

October 28, 2021Lake County, Orange County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Oct 28, 2021, 1:38 PM EDT for Lake County, Orange County, Florida. It was in force for 52 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: Oct 28, 2021, 1:38 PM EDT (17:38 UTC)
Expired: Oct 28, 2021, 2:30 PM EDT
In force: 52 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Lake County, FL, Orange County, FL

The radar

The Melbourne radar (KMLB), 118 km from the middle of the area, began a volume at 17:42 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
Oct 28, 9:00 AM EDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 5.6 hours before the alert went out and 113 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1603 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

494 
WUUS52 KMLB 281738
SVRMLB
FLC069-095-281830-
/O.NEW.KMLB.SV.W.0038.211028T1738Z-211028T1830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
138 PM EDT Thu Oct 28 2021

The National Weather Service in Melbourne has issued a

* Severe Thunderstorm Warning for...
  Lake County in east central Florida...
  Northwestern Orange County in east central Florida...

* Until 230 PM EDT.

* At 137 PM EDT, a severe thunderstorm was located 7 miles southeast
  of Bushnell, moving northeast at 60 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Orlando, Apopka, Ocoee, Winter Garden and Leesburg. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 500 PM EDT for east central
Florida.

Tornadoes can develop quickly from severe thunderstorms. Although a 
tornado is not immediately likely, if one is spotted, act quickly 
and move to a place of safety inside a sturdy structure such as a 
small interior room.

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

&&

LAT...LON 2896 8195 2896 8166 2902 8166 2904 8144
      2877 8141 2872 8143 2871 8146 2864 8146
      2864 8140 2853 8139 2842 8196
TIME...MOT...LOC 1737Z 244DEG 50KT 2856 8206 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Leahy

1 follow-up statement

705 
WWUS52 KMLB 281809
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
209 PM EDT Thu Oct 28 2021

FLC069-095-281830-
/O.CON.KMLB.SV.W.0038.000000T0000Z-211028T1830Z/
Lake FL-Orange FL-
209 PM EDT Thu Oct 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR CENTRAL LAKE AND NORTHWESTERN ORANGE COUNTIES...

At 208 PM EDT, a severe thunderstorm was located over Zellwood,
moving northeast at 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Apopka, Eustis, Tavares, Mount Dora and Howey-In-the-hills. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 500 PM EDT for east central
Florida.

Tornadoes can develop quickly from severe thunderstorms. Although a 
tornado is not immediately likely, if one is spotted act quickly and 
move to a place of safety inside a sturdy structure, such as a small 
interior room.

&&

LAT...LON 2902 8166 2904 8144 2877 8141 2872 8143
      2871 8146 2864 8146 2863 8154 2861 8178
      2896 8182 2896 8166
TIME...MOT...LOC 1808Z 244DEG 50KT 2875 8161 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Leahy

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 28, 11:13 AM EDT	Special Weather Statement	MLB	Seminole	47 min
Oct 28, 11:27 AM EDT	Special Marine Warning	MLB		46 min
Oct 28, 1:14 PM EDT	Special Weather Statement	MLB	Lake	76 min
Oct 28, 2:14 PM EDT	Special Weather Statement	MLB	Lake, Volusia	61 min
Oct 28, 2:19 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange, Seminole	41 min
Oct 28, 2:37 PM EDT	Special Marine Warning	MLB		83 min
Oct 28, 2:49 PM EDT	Special Marine Warning	MLB		41 min
Oct 28, 2:55 PM EDT	Special Weather Statement	MLB	Orange	50 min
Oct 28, 3:13 PM EDT	Special Weather Statement	MLB	Volusia	47 min
Oct 28, 3:29 PM EDT	Tornado Warning	MLB	Volusia	16 min
Oct 28, 3:52 PM EDT	Special Weather Statement	MLB	Brevard, Osceola, Seminole	53 min
Oct 28, 3:55 PM EDT	Special Marine Warning	MLB		65 min
Oct 28, 4:13 PM EDT	Special Marine Warning	MLB		41 min
Oct 28, 4:19 PM EDT	Special Weather Statement	MLB	Okeechobee	41 min
Oct 28, 4:59 PM EDT	Tornado Warning	MLB	Indian River, Osceola	31 min
Oct 28, 5:21 PM EDT	Tornado Warning	MLB	Brevard, Indian River	24 min
Oct 28, 5:41 PM EDT	Special Marine Warning	MLB		2 hr
Oct 28, 5:43 PM EDT	Special Weather Statement	MLB	Indian River	47 min

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.