Alert archive / Florida / Flash Flood Warnings in 2021
Flash Flood Warning 2, NWS Melbourne, FL
NWS Melbourne, FL issued this flash flood warning at Nov 21, 2021, 2:04 PM EST for Saint Lucie County, Florida. It was in force for 3 hr. 5 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Nov 21, 2021, 2:04 PM EST (19:04 UTC)
- Expired
- Nov 21, 2021, 5:00 PM EST
- In force
- 3 hr
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
- Flood severity
- None
County Saint Lucie County, FL
The radar
The Melbourne radar (KMLB), 91 km from the middle of the area, began a volume at 19:04 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Nov 21, 2:20 PM EST | FLOOD | 5 N Port Saint Lucie, FL | PUBLIC REPORT RETRIEVED VIA SNAPCHAT SHOWS WATER ACROSS NW ST JAMES DR NEAR NW PINE TRACE AVE. APPEARS TO BE 4 TO 6 INCHES IN SPOTS. TIME ESTIMATED. |
| Nov 21, 2:39 PM EST | FLASH FLOOD | 4 Nne Port Saint Lucie, FL | PUBLIC REPORTS ROAD COMPLETELY UNDERWATER AT THE INTERSECTION OF OLEANDER AVE AND ASH STREET IN PSL. WATER IS UP TO THE FRONT OF SEVERAL HOMES. |
| Nov 21, 2:50 PM EST | FLOOD | 5 Nne Port Saint Lucie, FL | PORT ST. LUCIE PD REPORTS FLOODING ACROSS THE ROAD AT US-1 AND KITTERMAN RD. |
| Nov 21, 2:50 PM EST | FLASH FLOOD | 4 Nne Port Saint Lucie, FL | PORT ST. LUCIE PD REPORTS SOUTHBOUND US-1 AT PRIMA VISTA BOULEVARD IS CLOSED DUE TO FLOODING. |
| Nov 21, 2:50 PM EST | FLASH FLOOD | 4 Nne Port Saint Lucie, FL | PORT ST. LUCIE POLICE DEPARTMENT REPORTS WATER APPROACHING HOMES IN THE 500 BLOCK OF OLEANDER AVE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Cape Canaveral, FL (KXMR), launched 12:00Z, 7.1 hours before the alert went out and 124 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
- 170 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 879 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
350
WGUS52 KMLB 211904
FFWMLB
FLC111-212200-
/O.NEW.KMLB.FF.W.0002.211121T1904Z-211121T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Melbourne FL
204 PM EST Sun Nov 21 2021
The National Weather Service in Melbourne has issued a
* Flash Flood Warning for...
Southeastern St. Lucie County in east central Florida...
* Until 500 PM EST.
* At 204 PM EST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
6 and 8 inches of rain have fallen. Additional rainfall amounts of
1 to 2 inches are possible in the warned area. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Walton, Fort Pierce, White City, Saint Lucie Nuclear Power Plant,
Indian River Estates, Port Saint Lucie River Park, Fort Pierce
South, Saint Lucie West, Collins Park Estates, Frederick Douglass
Park, Hutchinson Island South, Tradition Field and Carlton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 2742 8027 2743 8024 2742 8024 2741 8023
2735 8020 2729 8018 2729 8025 2728 8037
2740 8047
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$1 follow-up statement
455
WGUS72 KMLB 212002
FFSMLB
Flash Flood Statement
National Weather Service Melbourne FL
302 PM EST Sun Nov 21 2021
FLC111-212200-
/O.CON.KMLB.FF.W.0002.000000T0000Z-211121T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
St. Lucie FL-
302 PM EST Sun Nov 21 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM EST THIS
AFTERNOON FOR SOUTHEASTERN ST. LUCIE COUNTY...
At 302 PM EST, police dispatch reports flood waters approaching
homes on Oleander Avenue in Port St Lucie and many roads along US 1
with water across the road. Between 7.5 and 9.5 inches of rain have
fallen. Additional rainfall amounts of 1 to 2 inches are possible in
the warned area. Flash flooding is already occurring.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Law enforcement reported.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Walton, Fort Pierce, White City, Saint Lucie Nuclear Power Plant,
Indian River Estates, Port Saint Lucie River Park, Fort Pierce
South, Saint Lucie West, Collins Park Estates, Frederick Douglass
Park, Hutchinson Island South, Tradition Field and Carlton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 2742 8027 2743 8024 2742 8024 2741 8023
2735 8020 2729 8018 2729 8025 2728 8037
2740 8047
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CLThe office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 21, 8:38 AM EST | Areal Flood Advisory | MLB | Saint Lucie | 112 min |
| Nov 21, 12:21 PM EST | Areal Flood Advisory | MLB | Saint Lucie | 114 min |
| Nov 21, 1:00 PM EST | Areal Flood Advisory | MLB | Saint Lucie | 75 min |
| Nov 21, 1:37 PM EST | Areal Flood Warning | MLB | Saint Lucie | 27 min |
| Nov 21, 2:32 PM EST | Areal Flood Warning | MLB | Saint Lucie | 2 hr |
| Nov 21, 3:36 PM EST | Areal Flood Advisory | MLB | Martin, Saint Lucie | 84 min |
| Nov 21, 5:00 PM EST | Areal Flood Warning | MLB | Saint Lucie | 2 hr |
Nearby
Flash Flood Warnings in Florida, 2021Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.