Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

January 27, 2021Clay County, Union County, Florida

NWS Jacksonville, FL issued this special weather statement at Jan 27, 2021, 3:35 PM EST for Clay County, Union County, Florida. It was in force for 40 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 27, 2021, 3:35 PM EST (20:35 UTC)
Expired: Jan 27, 2021, 4:15 PM EST
In force: 40 min
Issued by: NWS Jacksonville, FL

Counties Clay County, FL, Union County, FL

The radar

The Jacksonville radar (KJAX), 50 km from the middle of the area, began a volume at 20:36 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

Jacksonville, FL (KJAX), launched 12:00Z, 8.6 hours before the alert went out and 51 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: 88 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 456 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 Jacksonville, FL wrote its last area forecast discussion before this special weather statement went out at Jan 27, 3:16 PM EST, 19 minutes earlier.

Area forecast discussion, Jan 27, 3:16 PM EST, 19 minutes before

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In the hours before

Special weather statement, Jan 27, 12:39 PM EST, 2 hours 56 minutes before

Special Weather Statement
National Weather Service Jacksonville FL
1239 PM EST Wed Jan 27 2021

FLZ020-021-271815-
Hamilton FL-Suwannee FL-
1239 PM EST Wed Jan 27 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN SUWANNEE AND CENTRAL
HAMILTON COUNTIES UNTIL 115 PM EST...

* At 1237 PM EST, Doppler radar was tracking a strong thunderstorm 9
  miles west of Madison, moving east at 45 mph.

* Wind gusts of 50 to 55 mph and funnel clouds possible with this
  storm.

* Locations impacted include...
  Live Oak, Jasper, Suwannee Springs, Suwannee River State Park, Blue
  Springs, Crossroads, Newburn and Houston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This thunderstorm has a history of producing a tornado.

Funnel clouds occasionally touch down and produce tornadoes or
waterspouts. Move indoors and stay away from windows.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Jacksonville on
Facebook and Twitter.

&&

LAT...LON 3026 8324 3029 8323 3031 8321 3035 8321
      3035 8319 3038 8319 3039 8317 3041 8318
      3042 8322 3046 8322 3047 8324 3054 8325
      3051 8286 3022 8288 3025 8325 3026 8325
TIME...MOT...LOC 1737Z 274DEG 39KT 3042 8357

BOOTHE

Local storm report, Jan 27, 2:20 PM EST, 1 hour 15 minutes before

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Local storm report, Jan 27, 2:45 PM EST, 50 minutes before

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Local storm report, Jan 27, 2:50 PM EST, 45 minutes before

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Special weather statement, Jan 27, 3:06 PM EST, 29 minutes before

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Special weather statement, Jan 27, 3:35 PM EST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 27, 1:58 AM EST	Dense Fog Advisory	JAX	Alachua, Bradford, Flagler, Marion	7 hr
Jan 27, 2:02 AM EST	Gale Warning	JAX		36 hr
Jan 27, 2:02 AM EST	Small Craft Advisory	JAX		19 hr
Jan 27, 12:39 PM EST	Special Weather Statement	JAX	Hamilton	36 min
Jan 27, 12:57 PM EST	Severe Thunderstorm Warning	JAX	Hamilton, Suwannee	48 min
Jan 27, 1:42 PM EST	Severe Thunderstorm Warning	JAX	Columbia, Hamilton, Suwannee	63 min
Jan 27, 1:47 PM EST	Tornado Warning	JAX	Hamilton, Suwannee	28 min
Jan 27, 2:04 PM EST	Tornado Warning	JAX	Columbia, Hamilton, Suwannee	41 min
Jan 27, 2:34 PM EST	Severe Thunderstorm Warning	JAX	Baker, Columbia	41 min
Jan 27, 3:06 PM EST	Special Weather Statement	JAX	Gilchrist	54 min
Jan 27, 3:12 PM EST	Severe Thunderstorm Warning	JAX	Baker, Clay, Duval, Nassau	63 min
Jan 27, 3:54 PM EST	Special Weather Statement	JAX	Alachua	51 min
Jan 27, 3:59 PM EST	Tornado Warning	JAX	Clay, Duval, Saint Johns	19 min
Jan 27, 4:04 PM EST	Special Marine Warning	JAX		86 min
Jan 27, 4:08 PM EST	Special Weather Statement	JAX	Duval	37 min
Jan 27, 4:32 PM EST	Special Weather Statement	JAX	Marion	58 min
Jan 27, 5:23 PM EST	Special Weather Statement	JAX	Marion	37 min
Jan 27, 6:02 PM EST	Special Weather Statement	JAX	Marion	43 min
Jan 26, 8:32 PM EST	Special Weather Statement	JAX	Atkinson	28 min
Jan 27, 12:27 PM EST	Special Weather Statement	JAX	Clinch	48 min

Nearby

Special Weather Statements in Florida, 2021 Every special weather statement in 2021

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.