Alert archive / Florida / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 13, NWS Melbourne, FL

April 10, 2018Orange County, Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Apr 10, 2018, 11:16 AM EDT for Orange County, Osceola County, Florida. It was in force for 29 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: Apr 10, 2018, 11:16 AM EDT (15:16 UTC)
Expired: Apr 10, 2018, 11:45 AM EDT
In force: 29 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Orange County, FL, Osceola County, FL

The radar

The Melbourne radar (KMLB), 91 km from the middle of the area, began a volume at 15:18 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 3.3 hours before the alert went out and 103 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: 1449 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

833 
WUUS52 KMLB 101516
SVRMLB
FLC095-097-101545-
/O.NEW.KMLB.SV.W.0013.180410T1516Z-180410T1545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
1116 AM EDT TUE APR 10 2018

The National Weather Service in Melbourne has issued a

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

* Until 1145 AM EDT

* At 1115 AM EDT, a severe thunderstorm was located over Bay Lake,
  moving east 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. 

* Locations impacted include...
  Orlando, Kissimmee, Bay Lake, Celebration and Intercession City. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2850 8145 2825 8138 2825 8155 2826 8156
      2826 8165 2832 8166 2842 8166
TIME...MOT...LOC 1515Z 258DEG 16KT 2836 8158 

HAIL...1.00IN
WIND...60MPH
 
$$

Smith

1 follow-up statement

382 
WWUS52 KMLB 101531
SVSMLB

Severe Weather Statement
National Weather Service Melbourne FL
1131 AM EDT TUE APR 10 2018

FLC095-097-101545-
/O.CON.KMLB.SV.W.0013.000000T0000Z-180410T1545Z/
Orange FL-Osceola FL-
1131 AM EDT TUE APR 10 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 AM EDT
FOR SOUTHWESTERN ORANGE AND NORTHWESTERN OSCEOLA COUNTIES...

At 1130 AM EDT, a severe thunderstorm was located near Sea World, or
near Bay Lake, moving east 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. 

Locations impacted include...
Orlando, Kissimmee, Bay Lake, Celebration and Intercession City. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2850 8145 2825 8138 2826 8148 2826 8159
      2844 8161
TIME...MOT...LOC 1530Z 258DEG 16KT 2837 8150 

HAIL...1.00IN
WIND...60MPH
 
$$

Smith

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 9:43 PM EDT	Areal Flood Advisory	MLB	Lake, Volusia	92 min
Apr 9, 11:56 PM EDT	Areal Flood Advisory	MLB	Lake, Volusia	2 hr
Apr 10, 3:54 AM EDT	Small Craft Advisory	MLB		54 hr
Apr 10, 6:43 AM EDT	Areal Flood Advisory	MLB	Lake, Volusia	2 hr
Apr 10, 10:53 AM EDT	Special Weather Statement	MLB	Orange	37 min
Apr 10, 11:35 AM EDT	Severe Thunderstorm Warning	MLB	Orange, Osceola	40 min
Apr 10, 11:53 AM EDT	Special Weather Statement	MLB	Brevard, Orange, Osceola	82 min
Apr 10, 12:22 PM EDT	Special Marine Warning	MLB		53 min
Apr 10, 12:47 PM EDT	Special Weather Statement	MLB	Indian River, Okeechobee, Saint Lucie	88 min
Apr 10, 12:55 PM EDT	Special Marine Warning	MLB		65 min
Apr 10, 12:59 PM EDT	Special Weather Statement	MLB	Brevard	61 min
Apr 10, 1:54 PM EDT	Special Marine Warning	MLB		51 min
Apr 10, 2:00 PM EDT	Special Weather Statement	MLB	Indian River, Okeechobee, Saint Lucie	60 min
Apr 10, 2:31 PM EDT	Special Marine Warning	MLB		59 min
Apr 10, 3:16 PM EDT	Special Weather Statement	MLB	Martin	44 min
Apr 10, 3:23 PM EDT	Special Marine Warning	MLB		82 min

Nearby

Severe Thunderstorm Warnings in Florida, 2018 Every severe thunderstorm warning in 2018

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.