Alert archive / Florida / Special Weather Statements in 2021
Special Weather Statement, NWS Jacksonville, FL
NWS Jacksonville, FL issued this special weather statement at Aug 9, 2021, 10:30 PM EDT for Gilchrist 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 9, 2021, 10:30 PM EDT (02:30 UTC)
- Expired
- Aug 9, 2021, 11:15 PM EDT
- In force
- 45 min
- Issued by
- NWS Jacksonville, FL
- Hail
- 0.00 in
- Wind
- 30
County Gilchrist County, FL
The radar
The Jacksonville radar (KJAX), 133 km from the middle of the area, began a volume at 02:31 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
Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 2.5 hours before the alert went out and 173 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.
- Mixed-layer CAPE
- 2946 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1184 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>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 9, 7:14 PM EDT, 3 hours 16 minutes earlier.
Area forecast discussion, Aug 9, 7:14 PM EDT, 3 hours 16 minutes before
Area Forecast Discussion National Weather Service Jacksonville FL 714 PM EDT Mon Aug 9 2021 .AVIATION... [Through 00Z Wednesday] Showers and storms have moved westward away from the TAF sites with some lingering near KGNV for the next couple of hours. Patchy fog may be possible at KVQQ in the early morning hours. Isolated showers and storms develop again tomorrow afternoon with the best chance at KGNV, KJAX and KVQQ. && .PREV DISCUSSION [339 PM EDT]... .NEAR TERM [Tonight through Tuesday]...High pressure ridge with light winds located across the area today. Scattered showers and storms have developed and may produce strong gusty winds as dry air aloft contributes to downburst potential. Light steering winds will also result in some areas of locally heavy rainfall. Best coverage should occur over the interior where seabreezes and outflow boundaries merge this afternoon/evening. Expect convection to weaken and dissipate by midnight with decreased heating. Similar conditions expected on Tuesday as the subtropical ridge remains over the area. .SHORT TERM [Tuesday night through Thursday Night]... Deep layer ridge will shift to the north of the area through the period. Convection will be more likely inland as the east coast seabreeze moves well inland. A light deep easterly flow will produce a slow cell motion to the west. Near average temperatures will persist. .LONG TERM [Friday Through Monday]...Subtropical ridge will remain to the north maintaining the easterly flow. An increase in tropical moisture and shower/thunderstorm activity is expected this weekend into early next week. Models show a tropical disturbance moving westward to the vicinity of south Florida this weekend. A lot of uncertainty exists on the development and track of this system. Rain chances should be at or above average with daytime temperatures at or slightly below average. .MARINE...Surface ridge over the waters will gradually lift north the next several days. An easterly flow with a developing swell will persist through the week. A tropical disturbance in the Atlantic may bring an increase in winds/seas by the weekend as it moves westward. Rip Currents: Moderate risk will continue the next few days due to onshore winds and a developing easterly swell. .FIRE WEATHER...Light winds over the area will result in low dispersions especially over inland areas through Wednesday. .HYDROLOGY...Recent heavy rainfall has caused minor to moderate flooding on the Santa Fe and St. Marys River..to continue the next several days. Minor flooding also ongoing on the Suwannee and Satilla Rivers. && .PRELIMINARY POINT TEMPS/POPS... AMG 73 92 72 91 72 / 10 20 10 40 10 SSI 78 89 78 89 78 / 10 10 10 20 0 JAX 75 92 75 91 75 / 10 40 10 30 10 SGJ 75 89 75 90 75 / 10 20 10 20 10 GNV 74 92 73 91 73 / 30 30 10 50 10 OCF 73 92 73 92 73 / 30 60 20 50 10 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...None. GA...None. AM...None. &&
In the hours before
Special weather statement, Aug 9, 7:15 PM EDT, 3 hours 15 minutes before
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</html>The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 11:45 PM EDT | Areal Flood Warning | JAX | Columbia, Gilchrist | 2 hr |
| Aug 10, 7:27 AM EDT | Dense Fog Advisory | JAX | Appling, Atkinson, Bacon, Brantley, Coffee, Glynn and 4 more | 93 min |
Nearby
Special Weather Statements in Florida, 2021Every 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.