Alert archive / Florida / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 135, NWS Miami, FL

July 25, 2009Hendry County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 25, 2009, 5:46 PM EDT for Hendry County, Florida. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 25, 2009, 5:46 PM EDT (21:46 UTC)
Expired: Jul 25, 2009, 6:14 PM EDT
In force: 28 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

County Hendry County, FL

The radar

The Miami radar (KAMX), 129 km from the middle of the area, began a volume at 21:48 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, 9.8 hours before the alert went out and 223 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: 574 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 1158 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -20 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Miami, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 25, 3:12 PM EDT, 2 hours 34 minutes earlier.

Area forecast discussion, Jul 25, 3:12 PM EDT, 2 hours 34 minutes before

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Hazardous weather outlook, Jul 25, 10:25 AM EDT, 7 hours 21 minutes before

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In the hours before

Local storm report, Jul 25, 1:38 PM EDT, 4 hours 8 minutes before

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Special weather statement, Jul 25, 1:40 PM EDT, 4 hours 6 minutes before

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Local storm report, Jul 25, 2:02 PM EDT, 3 hours 44 minutes before

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Local storm report, Jul 25, 2:34 PM EDT, 3 hours 12 minutes before

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Special weather statement, Jul 25, 2:49 PM EDT, 2 hours 57 minutes before

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Special weather statement, Jul 25, 4:29 PM EDT, 1 hour 17 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 6:45 AM EDT	Special Marine Warning	MFL		45 min
Jul 25, 11:58 AM EDT	Special Weather Statement	MFL	Monroe	32 min
Jul 25, 12:30 PM EDT	Special Weather Statement	MFL	Broward, Miami-Dade	30 min
Jul 25, 1:40 PM EDT	Special Weather Statement	MFL	Palm Beach	35 min
Jul 25, 2:25 PM EDT	Special Marine Warning	MFL		65 min
Jul 25, 2:30 PM EDT	Special Marine Warning	MFL		60 min
Jul 25, 2:49 PM EDT	Special Weather Statement	MFL	Palm Beach	26 min
Jul 25, 4:29 PM EDT	Special Weather Statement	MFL	Collier	31 min
Jul 25, 5:05 PM EDT	Severe Thunderstorm Warning	MFL	Collier	44 min

Nearby

Severe Thunderstorm Warnings in Florida, 2009 Every severe thunderstorm warning in 2009

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.