Alert archive / Mississippi / Flash Flood Warnings in 2017

Flash Flood Warning 33, NWS Mobile, AL

June 21, 20175 counties in Mississippi; 4 counties in Alabama

NWS Mobile, AL issued this flash flood warning at Jun 21, 2017, 3:46 PM CDT for 5 counties in Mississippi; 4 counties in Alabama. It was in force for 6 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
Jun 21, 2017, 3:46 PM CDT (20:46 UTC)
Expired
Jun 21, 2017, 9:45 PM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Baldwin County, AL, Clarke County, AL, Mobile County, AL, Washington County, AL, George County, MS, Greene County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 20 km from the middle of the area, began a volume at 20:49 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.8 hours before the alert went out and 129 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, Slidell Radar S, LA at 12:00Z on 2017-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 262 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, Slidell Radar S, LA at 12:00Z on 2017-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 485 square meters per square second.193958Sfc1 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
262 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
465 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
485 m²/s²
0-3 km storm-relative helicity
506 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.3

Open this sounding in Storm Lab

The text

As transmitted.

651 
WGUS54 KMOB 212046
FFWMOB
ALC003-025-097-129-MSC039-041-111-131-153-220245-
/O.NEW.KMOB.FF.W.0033.170621T2046Z-170622T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
346 PM CDT WED JUN 21 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Mobile County in southwestern Alabama...
  Baldwin County in southwestern Alabama...
  Southern Washington County in southwestern Alabama...
  Southern Clarke County in southwestern Alabama...
  George County in southeastern Mississippi...
  Perry County in southeastern Mississippi...
  Southern Wayne County in southeastern Mississippi...
  Greene County in southeastern Mississippi...
  Stone County in southeastern Mississippi...

* Until 945 PM CDT Wednesday

* At 341 PM CDT, Doppler radar indicated a heavy rainband associated 
  with Tropical Storm Cindy that was moving into the area from the 
  south. Flash flooding is expected to begin over the next couple of 
  hours.

* Some locations that will experience flooding include...
  Midtown Mobile, Downtown Mobile, Prichard, Daphne, Tillmans Corner,
  Fairhope, Saraland, Gulf Shores, Bay Minette, Foley, Theodore,
  Chickasaw, Satsuma, Orange Beach, Spanish Fort, Grand Bay, Wiggins,
  Robertsdale, Citronelle and Lucedale.

Additional rainfall amounts of 4 to 8 inches are possible 
throughout this evening. This could become a very serious situation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3022 8838 3074 8841 3073 8888 3068 8889
      3068 8924 3065 8925 3065 8934 3091 8934
      3091 8914 3143 8915 3145 8829 3115 8784
      3082 8759 3030 8750 3028 8753 3029 8750
      3024 8749

$$
1 follow-up statement
475 
WGUS74 KMOB 212229
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
529 PM CDT WED JUN 21 2017

ALC003-025-097-129-MSC039-041-111-131-153-220245-
/O.CON.KMOB.FF.W.0033.000000T0000Z-170622T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mobile AL-Baldwin AL-Washington AL-Clarke AL-George MS-Perry MS-
Wayne MS-Greene MS-Stone MS-
529 PM CDT WED JUN 21 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR
MOBILE...BALDWIN...SOUTHERN WASHINGTON...SOUTHERN CLARKE...GEORGE...
PERRY...SOUTHERN WAYNE...GREENE AND STONE COUNTIES...

At 523 PM CDT, Doppler radar indicated a heavy rainband that has 
rotated ashore over southwestern Alabama and interior southeast 
Mississippi. Individual storms moving along the band are producing 
rainfall rates as high as two inches per hour. Some areas could 
easily pick up three to four inches just over the next three hours.

If you live in an urban area or near a small creek or stream please 
heed this warning and be prepared to act!

Some locations that will experience flooding include...
Midtown Mobile, Downtown Mobile, Prichard, Daphne, Tillmans Corner,
Fairhope, Saraland, Gulf Shores, Bay Minette, Foley, Theodore,
Chickasaw, Satsuma, Orange Beach, Spanish Fort, Grand Bay, Wiggins,
Robertsdale, Citronelle and Lucedale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3022 8838 3074 8841 3073 8888 3068 8889
      3068 8924 3065 8925 3065 8934 3091 8934
      3091 8914 3143 8915 3145 8829 3115 8784
      3082 8759 3030 8750 3028 8753 3029 8750
      3024 8749

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 10:16 PM CDTFlash Flood WarningMOBGeorge, Stone6 hr
Jun 21, 4:15 AM CDTFlash Flood WarningMOBGeorge, Stone12 hr
Jun 21, 9:01 AM CDTTornado WarningMOBStone37 min
Jun 21, 9:29 AM CDTRiver Flood WarningMOBPerry5 days
Jun 21, 12:35 PM CDTAreal Flood WarningMOBGeorge, Greene, Perry, Stone, Wayne24 hr
Jun 21, 3:37 PM CDTSpecial Weather StatementMOBStone38 min
Jun 21, 4:03 PM CDTTornado WarningMOBGreene17 min
Jun 21, 5:51 PM CDTFlash Flood WarningMOBGreene, Wayne6 hr
Jun 20, 8:12 PM CDTSpecial Marine WarningMOB2 hr
Jun 20, 8:19 PM CDTCoastal Flood WarningMOBBaldwin, Mobile50 hr
Jun 20, 8:23 PM CDTAreal Flood AdvisoryMOBBaldwin, Mobile3 hr
Jun 20, 10:07 PM CDTSpecial Marine WarningMOB113 min
Jun 20, 11:44 PM CDTSpecial Marine WarningMOB2 hr
Jun 21, 1:43 AM CDTSpecial Marine WarningMOB2 hr
Jun 21, 3:12 AM CDTSpecial Marine WarningMOB2 hr
Jun 21, 3:47 AM CDTSpecial Marine WarningMOB118 min
Jun 21, 5:44 AM CDTSpecial Marine WarningMOB2 hr
Jun 21, 8:38 AM CDTRiver Flood WarningMOBEscambia48 hr
Jun 21, 8:38 AM CDTRiver Flood WarningMOBEscambia61 hr
Jun 21, 8:38 AM CDTRiver Flood WarningMOBEscambia67 hr
Jun 21, 8:38 AM CDTRiver Flood WarningMOBEscambia12 days
Jun 21, 8:38 AM CDTRiver Flood WarningMOBCovington, Escambia3 days
Jun 21, 10:14 AM CDTAreal Flood AdvisoryMOBBaldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 4 more6 hr
Jun 21, 11:06 AM CDTFlash Flood WarningMOBButler, Conecuh, Covington, Escambia6 hr
Jun 21, 12:05 PM CDTFlash Flood WarningMOBBaldwin, Clarke, Conecuh, Escambia, Monroe, Washington6 hr
Jun 21, 2:29 PM CDTTornado WarningMOBBaldwin46 min
Jun 21, 2:44 PM CDTTornado WarningMOBEscambia30 min
Jun 21, 2:46 PM CDTTornado WarningMOBBaldwin59 min
Jun 21, 2:56 PM CDTSpecial Weather StatementMOBMobile34 min
Jun 21, 2:59 PM CDTSpecial Marine WarningMOB2 hr
Jun 21, 3:10 PM CDTTornado WarningMOBBaldwin25 min
Jun 21, 3:53 PM CDTTornado WarningMOBBaldwin52 min
Jun 21, 3:57 PM CDTSpecial Marine WarningMOB2 hr
Jun 21, 4:02 PM CDTRiver Flood WarningMOBMobile3 days
Jun 21, 4:17 PM CDTTornado WarningMOBEscambia43 min
Jun 21, 4:28 PM CDTSpecial Marine WarningMOB92 min
Jun 21, 4:52 PM CDTSevere Thunderstorm WarningMOBMobile38 min
Jun 21, 5:04 PM CDTSevere Thunderstorm WarningMOBBaldwin, Mobile86 min
Jun 21, 5:42 PM CDTSpecial Marine WarningMOB63 min
Jun 21, 5:48 PM CDTSevere Thunderstorm WarningMOBBaldwin44 min
Jun 21, 5:51 PM CDTSpecial Marine WarningMOB114 min
Jun 21, 6:10 PM CDTSevere Thunderstorm WarningMOBBaldwin26 min
Jun 21, 6:43 PM CDTSpecial Marine WarningMOB2 hr
Jun 21, 6:45 PM CDTTornado WarningMOBCovington45 min

Nearby

Flash Flood Warnings in Mississippi, 2017Flash Flood Warnings in Alabama, 2017Every flash flood warning in 2017

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.