Alert archive / Alabama / Areal Flood Warnings in 2021
Areal Flood Warning 4, NWS Mobile, AL
NWS Mobile, AL issued this areal flood warning at Apr 16, 2021, 8:39 AM CDT for Mobile County, Alabama. It was in force for 24 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
- Apr 16, 2021, 8:39 AM CDT (13:39 UTC)
- Expired
- Apr 17, 2021, 8:30 AM CDT
- In force
- 24 hr
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
- Flood severity
- None
County Mobile County, AL
The radar
The Mobile radar (KMOB), 47 km from the middle of the area, began a volume at 13:42 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
Slidell Radar S, LA (KSIL), launched 12:00Z, 1.7 hours before the alert went out and 150 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 822 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 152 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
977
WGUS44 KMOB 161339
FLWMOB
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mobile AL
839 AM CDT Fri Apr 16 2021
ALC097-171330-
/O.NEW.KMOB.FA.W.0004.210416T1339Z-210417T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mobile AL-
839 AM CDT Fri Apr 16 2021
The National Weather Service in Mobile has issued a
* Flood Warning for...
South Central Mobile County in southwestern Alabama...
* Until 830 AM CDT Saturday.
* At 839 AM CDT, Doppler radar indicated heavy rain due to
thunderstorms moving in from the west. Flooding is ongoing or
expected to begin shortly in the warned area. Between 6 and 8
inches of rain fell yesterday, and much more over the past week to
ten days.
* Given the rain during the past several days on Dauphin Island and
above normal tide levels, there is no way for the water to drain,
especially leading into and falling away from the time of high
tide. This will only get worse as more rain falls beginning this
morning, another round this evening and yet another round
tomorrow. This could equal or surpass the flooding experienced
yesterday on Dauphin Island. This is not just the typical flooding
that is usually experienced on the west end. An Areal Flood
Warning will remain in effect for inundation flooding until the
water recedes.
* Some locations that will experience flooding include...
Dauphin Island.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles. Move your personal property to higher
ground before the water begins to rise again beginning with the
round of rain today and the one incoming later this evening.
&&
LAT...LON 3024 8823 3025 8823 3026 8813 3026 8810
3027 8812 3033 8815 3033 8813 3031 8813
3028 8812 3025 8807 3024 8809 3024 8812
3025 8813
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 6:19 AM CDT | Special Marine Warning | MOB | 71 min | |
| Apr 16, 6:46 AM CDT | Special Marine Warning | MOB | 9 min | |
| Apr 16, 8:19 AM CDT | Special Marine Warning | MOB | 41 min | |
| Apr 16, 8:26 AM CDT | Special Marine Warning | MOB | 2 hr | |
| Apr 16, 9:13 AM CDT | Special Marine Warning | MOB | 92 min |
Nearby
Areal Flood Warnings in Alabama, 2021Every areal 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.