Alert archive / Florida / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 21, NWS Melbourne, FL

May 6, 2007Orange County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 6, 2007, 4:20 PM EDT for Orange County, Florida. It was in force for 32 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 6, 2007, 4:20 PM EDT (20:20 UTC)
Expired: May 6, 2007, 4:52 PM EDT
In force: 32 min
Issued by: NWS Melbourne, FL
Area: Counties, with a storm outline in the text

County Orange County, FL

The radar

The Melbourne radar (KMLB), 88 km from the middle of the area, began a volume at 20:20 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.

What was reported inside it

Time	Report	Where	Remark
May 6, 4:22 PM EDT	HAIL 0.75	Orlando, FL	STORM SPOTTER REPORTED PENNY SIZE HAIL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 6, 1:49 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 8.3 hours before the alert went out and 92 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: 1889 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 724 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS52 KMLB 062021
SVRMLB
FLC095-062100-
/O.NEW.KMLB.SV.W.0021.070506T2020Z-070506T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
420 PM EDT SUN MAY 6 2007

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL ORANGE COUNTY IN FLORIDA.

* UNTIL 500 PM EDT

* AT 416 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  ORLOVISTA...OR NEAR PINE HILLS...AND MOVING SOUTH AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED 
TO...  ORLANDO......BAY HILL...CONWAY...OAK RIDGE......DOCTOR 
PHILLIPS...TANGELO PARK...BELLE ISLE...  PINE CASTLE...THE 
ATTRACTIONS AREA.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN
HOUR AND OR LARGE DESTRUCTIVE HAIL. FREQUENT TO EXCESSIVE LIGHTNING
AND VERY HEAVY RAIN WILL ALSO BE POSSIBLE. IF THE STORM APPROACHES
YOU...SEEK SHELTER IN AN ENCLOSED BUILDING ON THE LOWEST FLOOR. KEEP
AWAY FROM WINDOWS.

LAT...LON 2861 8139 2858 8159 2834 8164 2834 8121

$$

15

1 follow-up statement

000 
WWUS52 KMLB 062052
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
450 PM EDT SUN MAY 6 2007

FLC095-062100-
/O.CAN.KMLB.SV.W.0021.000000T0000Z-070506T2100Z/
ORANGE FL-
450 PM EDT SUN MAY 6 2007

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ORANGE COUNTY IS
CANCELLED...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE SEVERE STORM 
THAT PROMPTED THE WARNING HAD MOVED SOUTH ACROSS ACROSS NORTHWEST 
OSCEOLA COUNTY. THE SEVERE THUNDERSTORM FOR ORANGE COUNTY HAS BEEN 
ALLOWED TO EXPIRE. THE SEVERE THUNDERSTORM WARNING FOR OSCEOLA 
COUNTY CONTINUES UNTIL 530 PM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT SUNDAY
EVENING FOR EAST CENTRAL FLORIDA.

LAT...LON 2861 8139 2858 8159 2834 8164 2834 8121

$$

VOLKMER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 10:14 AM EDT	Special Marine Warning	MLB		2 hr
May 6, 11:13 AM EDT	High Surf Advisory	MLB	Volusia	65 hr
May 6, 2:02 PM EDT	Special Marine Warning	MLB		118 min
May 6, 2:06 PM EDT	Wind Advisory	MLB	Orange, Osceola, Seminole, Volusia	30 hr
May 6, 2:16 PM EDT	Severe Thunderstorm Warning	MLB	Volusia	59 min
May 6, 2:31 PM EDT	Severe Thunderstorm Warning	MLB	Orange	59 min
May 6, 2:58 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Orange, Seminole, Volusia	62 min
May 6, 3:37 PM EDT	Severe Thunderstorm Warning	MLB	Orange, Seminole	23 min
May 6, 4:00 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	45 min
May 6, 4:25 PM EDT	Severe Thunderstorm Warning	MLB	Indian River	65 min
May 6, 4:34 PM EDT	Severe Thunderstorm Warning	MLB	Osceola	56 min
May 6, 4:57 PM EDT	Severe Thunderstorm Warning	MLB	Okeechobee	63 min
May 6, 5:15 PM EDT	Tornado Warning	MLB	Saint Lucie	45 min
May 6, 5:46 PM EDT	Severe Thunderstorm Warning	MLB	Martin, Okeechobee, Saint Lucie	51 min

Nearby

Severe Thunderstorm Warnings in Florida, 2007 Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.