Alert archive / Florida / Special Weather Statements in 2017

Special Weather Statement, NWS Key West, FL

January 23, 2017

NWS Key West, FL issued this special weather statement at Jan 23, 2017, 3:30 AM EST. It was in force for 60 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: Jan 23, 2017, 3:30 AM EST (08:30 UTC)
Expired: Jan 23, 2017, 4:30 AM EST
In force: 60 min
Issued by: NWS Key West, FL

The radar

The Key West radar (KBYX), 56 km from the middle of the area, began a volume at 08:31 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

Key West, FL (KEYW), launched 00:00Z, 8.5 hours before the alert went out and 59 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: 1064 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 906 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 279 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 6.2

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

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

NWS Key West, FL wrote its last area forecast discussion before this special weather statement went out at Jan 23, 2:52 AM EST, 38 minutes earlier.

Area forecast discussion, Jan 23, 2:52 AM EST, 38 minutes before

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Hazardous weather outlook, Jan 22, 5:52 AM EST, 21 hours 38 minutes before

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In the hours before

Local storm report, Jan 23, 1:11 AM EST, 2 hours 19 minutes before

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Local storm report, Jan 23, 2:18 AM EST, 1 hour 12 minutes before

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Special weather statement, Jan 23, 3:30 AM EST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 22, 11:25 PM EST	Special Marine Warning	KEY		65 min
Jan 23, 12:31 AM EST	Special Marine Warning	KEY		59 min
Jan 23, 1:30 AM EST	Special Marine Warning	KEY		60 min
Jan 23, 2:24 AM EST	Severe Thunderstorm Warning	KEY	Monroe	66 min
Jan 23, 2:30 AM EST	Special Marine Warning	KEY		60 min
Jan 23, 3:27 AM EST	Special Marine Warning	KEY		63 min
Jan 23, 4:24 AM EST	Special Marine Warning	KEY		66 min
Jan 23, 4:30 AM EST	Special Weather Statement	KEY		15 min
Jan 23, 5:19 AM EST	Special Marine Warning	KEY		56 min
Jan 23, 6:11 AM EST	Special Marine Warning	KEY		49 min
Jan 23, 1:10 PM EST	Coastal Flood Advisory	KEY	Monroe	21 hr

Nearby

Special Weather Statements in Florida, 2017 Every special weather statement in 2017

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.