Alert archive / Florida / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 21, NWS Melbourne, FL

April 19, 2019Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Apr 19, 2019, 4:22 PM EDT for Osceola County, Florida. It was in force for 23 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 19, 2019, 4:22 PM EDT (20:22 UTC)
Expired: Apr 19, 2019, 4:45 PM EDT
In force: 23 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Osceola County, FL

The radar

The Melbourne radar (KMLB), 58 km from the middle of the area, began a volume at 20:26 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
Apr 19, 1:36 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 8.4 hours before the alert went out and 93 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: 324 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 928 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 189 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.7

Open this sounding in Storm Lab

The text

As transmitted.

680 
WUUS52 KMLB 192022
SVRMLB
FLC097-192045-
/O.NEW.KMLB.SV.W.0021.190419T2022Z-190419T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Melbourne FL
422 PM EDT Fri Apr 19 2019

The National Weather Service in Melbourne has issued a

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

* Until 445 PM EDT.

* At 422 PM EDT, severe thunderstorms were located along a line
  extending from near Harmony to near Lake Kissimmee to 10 miles
  northeast of Avon Park, moving east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Saint Cloud, Lake Kissimmee, Lake Marian, Holopaw and Narcoossee. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Melbourne.

&&

LAT...LON 2826 8131 2835 8123 2835 8086 2775 8088
      2765 8113 2764 8114 2765 8114 2771 8115
      2773 8117 2774 8116 2782 8121 2785 8124
      2786 8130 2792 8131 2794 8135 2795 8134
      2797 8136
TIME...MOT...LOC 2022Z 247DEG 40KT 2818 8123 2795 8121 2765 8134 

HAIL...<.75IN
WIND...60MPH
 
$$

Rodriguez

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 11:29 PM EDT	Special Weather Statement	MLB	Volusia	61 min
Apr 19, 3:55 AM EDT	Wind Advisory	MLB	Lake, Okeechobee, Orange, Osceola, Seminole, Volusia	16 hr
Apr 19, 12:25 PM EDT	Special Weather Statement	MLB	Lake	50 min
Apr 19, 12:54 PM EDT	Special Weather Statement	MLB	Osceola	51 min
Apr 19, 1:20 PM EDT	Special Weather Statement	MLB	Lake, Orange, Seminole, Volusia	85 min
Apr 19, 1:30 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange, Volusia	60 min
Apr 19, 1:32 PM EDT	Special Marine Warning	MLB		3 hr
Apr 19, 1:33 PM EDT	Special Weather Statement	MLB	Brevard	57 min
Apr 19, 2:29 PM EDT	Special Weather Statement	MLB	Indian River, Martin, Saint Lucie	61 min
Apr 19, 2:32 PM EDT	Special Weather Statement	MLB	Volusia	43 min
Apr 19, 2:37 PM EDT	Severe Thunderstorm Warning	MLB	Indian River, Saint Lucie	38 min
Apr 19, 3:12 PM EDT	Severe Thunderstorm Warning	MLB	Saint Lucie	18 min
Apr 19, 3:14 PM EDT	Special Weather Statement	MLB	Orange, Osceola	31 min
Apr 19, 3:37 PM EDT	Special Marine Warning	MLB		53 min
Apr 19, 3:48 PM EDT	Special Weather Statement	MLB	Orange, Seminole	42 min
Apr 19, 4:00 PM EDT	Special Weather Statement	MLB	Osceola	45 min
Apr 19, 4:12 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Seminole, Volusia	33 min
Apr 19, 4:27 PM EDT	Special Marine Warning	MLB		2 hr
Apr 19, 4:47 PM EDT	Special Weather Statement	MLB	Brevard, Osceola	28 min
Apr 19, 4:59 PM EDT	Special Weather Statement	MLB	Indian River, Okeechobee	31 min
Apr 19, 5:14 PM EDT	Special Weather Statement	MLB	Brevard	31 min
Apr 19, 5:30 PM EDT	Special Weather Statement	MLB	Indian River, Okeechobee, Saint Lucie	60 min
Apr 19, 6:46 PM EDT	Special Weather Statement	MLB	Martin, Saint Lucie	59 min
Apr 19, 7:05 PM EDT	Special Marine Warning	MLB		55 min

Nearby

Severe Thunderstorm Warnings in Florida, 2019 Every severe thunderstorm warning in 2019

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.