Alert archive / Florida / Flash Flood Warnings in 2020

Flash Flood Warning 8, NWS Miami, FL

May 25, 2020Palm Beach County, Florida

NWS Miami, FL issued this flash flood warning at May 25, 2020, 6:39 PM EDT for Palm Beach County, Florida. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 25, 2020, 6:39 PM EDT (22:39 UTC)
Expired
May 25, 2020, 9:30 PM EDT
In force
3 hr
Issued by
NWS Miami, FL
Area
Storm-based polygon
Flood severity
None

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 145 km from the middle of the area, began a volume at 22:42 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

Miami, FL (KMFL), launched 12:00Z, 10.7 hours before the alert went out and 120 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-pSkew-T log-p diagram, Miami, FL at 12:00Z on 2020-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 961 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 12:00Z on 2020-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
961 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
607 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.4

Open this sounding in Storm Lab

The text

As transmitted.

269 
WGUS52 KMFL 252239
FFWMFL
FLC099-260130-
/O.NEW.KMFL.FF.W.0008.200525T2239Z-200526T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Miami FL
639 PM EDT Mon May 25 2020

The National Weather Service in Miami has issued a

* Flash Flood Warning for...
  Northeastern Palm Beach County in southeastern Florida...

* Until 930 PM EDT.

* At 637 PM EDT, Doppler radar indicated slow moving thunderstorms 
  producing heavy rain across the warned area. RAINFALL AMOUNTS of 3 
  to 5 inches have fallen over this area from earlier thunderstorms 
  today. Additional rainfall a mounts of 1 to 3 inches are expected 
  from the ongoing slow moving thunderstorms. Flash flooding is 
  ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas.

* Some locations that will experience flooding include...
  West Palm Beach, Jupiter, Palm Beach Gardens, Riviera Beach and
  Palm Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 2697 8003 2669 8003 2670 8023 2696 8023
      2696 8014 2697 8014

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN THE NEXT COUPLE OF HOURS

$$

BAXTER
1 follow-up statement
390 
WGUS72 KMFL 260030
FFSMFL

Flash Flood Statement
National Weather Service Miami FL
830 PM EDT Mon May 25 2020

FLC099-260130-
/O.CON.KMFL.FF.W.0008.000000T0000Z-200526T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Palm Beach FL-
830 PM EDT Mon May 25 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM EDT FOR
NORTHEASTERN PALM BEACH COUNTY...

At 827 PM EDT, Doppler radar indicated that the thunderstorms 
produced the heavy rains across the warned area have moved out of 
the area. However, rainfall amounts of 3 to 5 inches have fallen 
from the earlier thunderstorms that will take some time to drain 
away. Therefore, the flash warning will remain in effect for the 
area.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flooding of small creeks and streams, urban areas, 
         highways, streets and underpasses as well as other drainage 
         and low lying areas.

Some locations that will experience flooding include...
West Palm Beach, Jupiter, Palm Beach Gardens, Riviera Beach and Palm
Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

While the heavy rainfall has ended, flooding remains a threat around
canals and streams, highways, streets, and underpasses as well as
other drainage areas and low lying spots.

&&

LAT...LON 2697 8003 2669 8003 2670 8023 2696 8023
      2696 8014 2697 8014

FLASH FLOOD...RADAR INDICATED

$$

BAXTER

The office that day

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

IssuedProductOfficeCountiesLasted
May 24, 8:41 PM EDTSpecial Marine WarningMFL94 min
May 24, 9:13 PM EDTSpecial Weather StatementMFLMiami-Dade17 min
May 25, 12:49 AM EDTSpecial Marine WarningMFL56 min
May 25, 1:21 AM EDTSpecial Weather StatementMFLMiami-Dade54 min
May 25, 1:27 AM EDTTornado WarningMFLMiami-Dade33 min
May 25, 1:39 AM EDTSpecial Weather StatementMFLMiami-Dade66 min
May 25, 1:51 AM EDTSpecial Weather StatementMFLMiami-Dade54 min
May 25, 2:40 AM EDTSpecial Weather StatementMFLBroward65 min
May 25, 2:53 AM EDTAreal Flood AdvisoryMFLMiami-Dade12 hr
May 25, 3:33 AM EDTAreal Flood AdvisoryMFLMiami-Dade3 hr
May 25, 4:53 AM EDTSpecial Weather StatementMFLMiami-Dade52 min
May 25, 4:57 AM EDTSpecial Weather StatementMFLMiami-Dade48 min
May 25, 6:20 AM EDTAreal Flood AdvisoryMFLMiami-Dade4 hr
May 25, 6:20 AM EDTSpecial Marine WarningMFL85 min
May 25, 6:55 AM EDTSpecial Weather StatementMFLMiami-Dade50 min
May 25, 7:02 AM EDTSpecial Marine WarningMFL43 min
May 25, 7:17 AM EDTSpecial Weather StatementMFLMartin13 min
May 25, 7:28 AM EDTSpecial Marine WarningMFL2 hr
May 25, 7:40 AM EDTSpecial Marine WarningMFL95 min
May 25, 7:43 AM EDTSpecial Weather StatementMFLPalm Beach47 min
May 25, 8:08 AM EDTSpecial Weather StatementMFLMiami-Dade52 min
May 25, 8:35 AM EDTSpecial Weather StatementMFLPalm Beach40 min
May 25, 8:53 AM EDTAreal Flood AdvisoryMFLPalm Beach4 hr
May 25, 9:02 AM EDTSpecial Weather StatementMFLMiami-Dade43 min
May 25, 9:11 AM EDTSpecial Marine WarningMFL64 min
May 25, 9:23 AM EDTSpecial Marine WarningMFL67 min
May 25, 9:47 AM EDTSpecial Marine WarningMFL28 min
May 25, 10:19 AM EDTSpecial Marine WarningMFL86 min
May 25, 10:33 AM EDTSpecial Marine WarningMFL57 min
May 25, 11:42 AM EDTSpecial Marine WarningMFL63 min
May 25, 12:27 PM EDTSpecial Weather StatementMFLMiami-Dade48 min
May 25, 12:43 PM EDTSpecial Marine WarningMFL2 hr
May 25, 12:44 PM EDTSpecial Marine WarningMFL61 min
May 25, 1:02 PM EDTAreal Flood AdvisoryMFLMiami-Dade118 min
May 25, 1:17 PM EDTSpecial Weather StatementMFLMiami-Dade43 min
May 25, 1:40 PM EDTSpecial Marine WarningMFL65 min
May 25, 2:01 PM EDTSpecial Weather StatementMFLMiami-Dade44 min
May 25, 2:17 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade28 min
May 25, 2:23 PM EDTFlash Flood WarningMFLMiami-Dade6 hr
May 25, 2:46 PM EDTSpecial Weather StatementMFLMiami-Dade44 min
May 25, 2:48 PM EDTSpecial Marine WarningMFL57 min
May 25, 2:52 PM EDTSpecial Marine WarningMFL83 min
May 25, 3:17 PM EDTAreal Flood AdvisoryMFLBroward3 hr
May 25, 3:33 PM EDTSpecial Weather StatementMFLBroward57 min
May 25, 3:40 PM EDTAreal Flood AdvisoryMFLMiami-Dade3 hr
May 25, 3:46 PM EDTSpecial Marine WarningMFL89 min
May 25, 4:04 PM EDTAreal Flood AdvisoryMFLMiami-Dade3 hr
May 25, 4:07 PM EDTSpecial Marine WarningMFL98 min
May 25, 4:28 PM EDTFlash Flood WarningMFLBroward4 hr
May 25, 4:32 PM EDTSpecial Weather StatementMFLMiami-Dade43 min
May 25, 4:44 PM EDTSpecial Marine WarningMFL61 min
May 25, 4:49 PM EDTAreal Flood AdvisoryMFLBroward, Palm Beach3 hr
May 25, 5:11 PM EDTSpecial Marine WarningMFL64 min
May 25, 5:32 PM EDTAreal Flood AdvisoryMFLPalm Beach3 hr
May 25, 5:47 PM EDTSpecial Marine WarningMFL58 min
May 25, 6:00 PM EDTSpecial Weather StatementMFLBroward45 min
May 25, 6:13 PM EDTSpecial Marine WarningMFL62 min
May 25, 6:24 PM EDTAreal Flood AdvisoryMFLBroward3 hr
May 25, 6:43 PM EDTSpecial Marine WarningMFL62 min
May 25, 6:47 PM EDTSpecial Weather StatementMFLBroward43 min
May 25, 7:15 PM EDTSpecial Marine WarningMFL90 min
May 25, 7:33 PM EDTAreal Flood AdvisoryMFLBroward, Palm Beach3 hr
May 25, 7:51 PM EDTSpecial Marine WarningMFL54 min

Nearby

Flash Flood Warnings in Florida, 2020Every flash flood warning in 2020

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.