Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Jacksonville, FL

August 1, 2021Hamilton County, Florida

NWS Jacksonville, FL issued this special weather statement at Aug 1, 2021, 6:45 PM EDT for Hamilton County, Florida. It was in force for 45 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: Aug 1, 2021, 6:45 PM EDT (22:45 UTC)
Expired: Aug 1, 2021, 7:30 PM EDT
In force: 45 min
Issued by: NWS Jacksonville, FL

County Hamilton County, FL

The radar

The Moody AFB radar (KVAX), 52 km from the middle of the area, began a volume at 22:47 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 10.8 hours before the alert went out and 112 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: 50 J/kg
Mixed-layer CIN: -151 J/kg
Mixed-layer LCL: 1672 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -52 m²/s²
0-3 km storm-relative helicity: -32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Aug 1, 6:25 PM EDT, 20 minutes earlier.

Area forecast discussion, Aug 1, 6:25 PM EDT, 20 minutes before

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In the hours before

Special weather statement, Aug 1, 5:20 PM EDT, 1 hour 25 minutes before

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Special weather statement, Aug 1, 5:25 PM EDT, 1 hour 20 minutes before

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Special weather statement, Aug 1, 5:58 PM EDT, 47 minutes before

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Special weather statement, Aug 1, 6:09 PM EDT, 36 minutes before

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Special weather statement, Aug 1, 6:23 PM EDT, 22 minutes before

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Special weather statement, Aug 1, 6:45 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Jacksonville FL
645 PM EDT Sun Aug 1 2021

FLZ020-021-012330-
Hamilton FL-Suwannee FL-
645 PM EDT Sun Aug 1 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN SUWANNEE AND HAMILTON
COUNTIES UNTIL 730 PM EDT...

* At 644 PM EDT, National Weather Service meteorologists were
  tracking a clusters of showers and thunderstorms centered
  just south of Jennings, moving southeast at 20 mph.

* Winds in excess of 40 mph possible with these storms.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

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 3063 8314 3059 8312 3056 8274 3046 8271
      3024 8289 3028 8323 3030 8323 3031 8321
      3035 8321 3035 8319 3038 8319 3039 8317
      3041 8318 3042 8322 3046 8322 3047 8324
      3052 8324 3063 8326
TIME...MOT...LOC 2244Z 306DEG 19KT 3057 8315

SHASHY

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 2:14 PM EDT	Special Marine Warning	JAX		61 min
Aug 1, 3:02 PM EDT	Special Marine Warning	JAX		71 min
Aug 1, 3:10 PM EDT	Special Weather Statement	JAX	Nassau	35 min
Aug 1, 3:38 PM EDT	Special Marine Warning	JAX		97 min
Aug 1, 4:49 PM EDT	Special Marine Warning	JAX		56 min
Aug 1, 5:18 PM EDT	Special Weather Statement	JAX	Nassau	42 min
Aug 1, 5:58 PM EDT	Special Weather Statement	JAX	Nassau	62 min
Aug 1, 6:23 PM EDT	Special Weather Statement	JAX	Nassau	52 min
Aug 1, 6:53 PM EDT	Special Weather Statement	JAX	Duval	52 min
Aug 1, 7:16 PM EDT	Special Weather Statement	JAX	Baker	59 min
Aug 1, 7:34 PM EDT	Special Weather Statement	JAX	Columbia, Suwannee	56 min
Jul 31, 10:06 PM EDT	Special Weather Statement	JAX	Bacon, Coffee	39 min
Jul 31, 10:35 PM EDT	Special Weather Statement	JAX	Bacon, Brantley, Pierce	40 min
Aug 1, 3:12 PM EDT	Special Weather Statement	JAX	Coffee	48 min
Aug 1, 3:28 PM EDT	Special Weather Statement	JAX	Atkinson	47 min
Aug 1, 3:46 PM EDT	Special Weather Statement	JAX	Camden, Ware	59 min
Aug 1, 3:57 PM EDT	Special Weather Statement	JAX	Bacon, Coffee	48 min
Aug 1, 4:10 PM EDT	Special Weather Statement	JAX	Clinch	50 min
Aug 1, 4:39 PM EDT	Special Weather Statement	JAX	Pierce	51 min
Aug 1, 4:42 PM EDT	Special Weather Statement	JAX	Atkinson	48 min
Aug 1, 4:44 PM EDT	Special Weather Statement	JAX	Ware	46 min
Aug 1, 4:47 PM EDT	Special Weather Statement	JAX	Camden	43 min
Aug 1, 5:20 PM EDT	Special Weather Statement	JAX	Clinch	55 min
Aug 1, 5:25 PM EDT	Special Weather Statement	JAX	Charlton	50 min
Aug 1, 6:09 PM EDT	Special Weather Statement	JAX	Clinch, Echols	51 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.