Alert archive / Florida / Flash Flood Warnings in 2021

Flash Flood Warning 21, NWS Mobile, AL

May 5, 2021Escambia County, Florida; Baldwin County, Alabama

NWS Mobile, AL issued this flash flood warning at May 5, 2021, 1:50 AM CDT for Escambia County, Florida; Baldwin County, Alabama. It was in force for 6 hr. 1 report 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: May 5, 2021, 1:50 AM CDT (06:50 UTC)
Expired: May 5, 2021, 7:45 AM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Baldwin County, AL, Escambia County, FL

The radar

The Mobile radar (KMOB), 86 km from the middle of the area, began a volume at 06:51 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
May 5, 6:40 AM CDT	FLASH FLOOD	3 Wsw Miflin, AL	CR 12 FROM HWY 59 TO JAMES RD HAS A SIGNIFICANT/DANGEROUS AMOUNT OF WATER ACROSS AND COVERING THE ROAD. ROAD IS CLOSED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 6.8 hours before the alert went out and 224 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: 3152 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 647 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 3.1
Supercell composite: 10.5

Open this sounding in Storm Lab

The text

As transmitted.

409 
WGUS54 KMOB 050650
FFWMOB
ALC003-FLC033-051245-
/O.NEW.KMOB.FF.W.0021.210505T0650Z-210505T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
150 AM CDT Wed May 5 2021

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Southeastern Baldwin County in southwestern Alabama...
  Southwestern Escambia County in northwestern Florida...

* Until 745 AM CDT.

* At 150 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Radar indicates that 2 to 4 
  inches of rain has fallen over the warned area over the past few 
  hours, and additional showers and storms will continue to develop 
  overnight. Storms training over these areas could result in a few 
  more inches of rain. Flash flooding is expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  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...
  Pensacola, Ferry Pass, Brent, West Pensacola, Ensley, Warrington, 
  Gonzalez, Foley, Orange Beach, Goulding, Point Clear, Lillian, 
  Myrtle Grove, Magnolia Springs, Bon Secour, Summerdale, Perdido 
  Beach, Elberta, Miflin and Josephine.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3033 8791 3049 8792 3062 8726 3056 8721
      3055 8720 3057 8721 3057 8719 3058 8721
      3058 8718 3060 8721 3056 8714 3038 8713
      3036 8720 3034 8712 3020 8804

FLASH FLOOD...RADAR INDICATED

$$

1 follow-up statement

442 
WGUS74 KMOB 050929
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
429 AM CDT Wed May 5 2021

ALC003-FLC033-051245-
/O.CON.KMOB.FF.W.0021.000000T0000Z-210505T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Baldwin AL-Escambia FL-
429 AM CDT Wed May 5 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 AM CDT THIS 
MORNING FOR SOUTHEASTERN BALDWIN AND SOUTHWESTERN ESCAMBIA 
COUNTIES...

At 429 AM CDT, Doppler radar indicated a large area of light to 
moderate rain showers persisting over the warned area, with embedded 
pockets of heavier showers and storms. Doppler radar estimates 
widespread rainfall amounts of 3 to 4 inches, with localized totals 
over 6 inches from near and south of a Magnolia Springs to Foley and 
Elberta to Ensley line. Additional heavy rainfall will remain 
possible over already saturated grounds through the early morning 
hours. Excessive runoff from heavy rains will result in flash 
flooding.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

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...
  Pensacola, Ferry Pass, Brent, West Pensacola, Ensley, Warrington, 
  Gonzalez, Foley, Orange Beach, Goulding, Point Clear, Lillian, 
  Myrtle Grove, Magnolia Springs, Bon Secour, Summerdale, Perdido 
  Beach, Elberta, Miflin and Josephine.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3033 8791 3049 8792 3062 8726 3056 8721
      3055 8720 3057 8721 3057 8719 3058 8721
      3058 8718 3060 8721 3056 8714 3038 8713
      3036 8720 3034 8712 3020 8804

FLASH FLOOD...RADAR INDICATED

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 4, 8:10 PM CDT	River Flood Warning	MOB	Okaloosa	48 hr
May 4, 8:15 PM CDT	River Flood Warning	MOB	Escambia	29 hr
May 4, 8:52 PM CDT	Special Weather Statement	MOB	Escambia, Okaloosa, Santa Rosa	68 min
May 4, 9:49 PM CDT	Areal Flood Advisory	MOB	Escambia, Santa Rosa	4 hr
May 5, 12:35 AM CDT	Areal Flood Advisory	MOB	Escambia	4 hr
May 5, 2:45 AM CDT	Areal Flood Advisory	MOB	Santa Rosa	4 hr
May 5, 7:43 AM CDT	Flash Flood Warning	MOB	Escambia	6 hr
May 5, 1:44 PM CDT	Areal Flood Advisory	MOB	Escambia	3 hr
May 4, 7:26 PM CDT	Special Marine Warning	MOB		2 hr
May 4, 7:28 PM CDT	Special Weather Statement	MOB	Covington, Escambia	62 min
May 4, 7:33 PM CDT	Special Weather Statement	MOB	Baldwin, Mobile	57 min
May 4, 7:44 PM CDT	Severe Thunderstorm Warning	MOB	Covington, Crenshaw	32 min
May 4, 8:20 PM CDT	Areal Flood Advisory	MOB	Mobile	6 hr
May 4, 8:28 PM CDT	Areal Flood Advisory	MOB	Baldwin	6 hr
May 4, 8:36 PM CDT	Flash Flood Warning	MOB	Mobile	6 hr
May 4, 9:41 PM CDT	Special Marine Warning	MOB		94 min
May 5, 2:27 AM CDT	River Flood Warning	MOB	Baldwin	23 hr
May 5, 2:30 AM CDT	River Flood Warning	MOB	Baldwin	22 hr
May 5, 2:50 AM CDT	Special Marine Warning	MOB		85 min
May 5, 6:29 AM CDT	Special Weather Statement	MOB	Baldwin	46 min
May 5, 7:07 AM CDT	Areal Flood Advisory	MOB	Mobile	3 hr
May 5, 7:19 AM CDT	Special Marine Warning	MOB		86 min
May 5, 8:00 AM CDT	River Flood Warning	MOB	Clarke, Monroe, Wilcox	7 days
May 5, 8:00 AM CDT	River Flood Warning	MOB	Dallas, Monroe, Wilcox	4 days
May 5, 8:31 AM CDT	Special Marine Warning	MOB		59 min
May 5, 8:57 AM CDT	Flash Flood Warning	MOB	Mobile	4 hr
May 5, 12:02 PM CDT	Special Marine Warning	MOB		88 min
May 5, 1:24 PM CDT	Areal Flood Advisory	MOB	Mobile	96 min
May 5, 1:26 PM CDT	Special Marine Warning	MOB		64 min

Nearby

Flash Flood Warnings in Florida, 2021 Flash Flood Warnings in Alabama, 2021 Every 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.