Alert archive / Alabama / Flash Flood Warnings in 2007

Flash Flood Warning 8, NWS Mobile, AL

October 23, 20074 counties in Alabama

NWS Mobile, AL issued this flash flood warning at Oct 23, 2007, 12:04 AM CDT for 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: Oct 23, 2007, 12:04 AM CDT (05:04 UTC)
Expired: Oct 23, 2007, 6:00 AM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Baldwin County, AL, Mobile County, AL, Monroe County, AL, Wilcox County, AL

The radar

The Mobile radar (KMOB), 92 km from the middle of the area, began a volume at 05:08 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

Birmingham, AL (KBMX), launched 00:00Z, 5.1 hours before the alert went out and 222 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: 464 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 563 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 201 m²/s²
0-3 km storm-relative helicity: 241 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KMOB 230508
FFWMOB
ALC003-097-099-131-231100-
/O.NEW.KMOB.FF.W.0008.071023T0504Z-071023T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1204 AM CDT TUE OCT 23 2007

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLOOD WARNING FOR...
  MONROE...WILCOX...BALDWIN...AND MOBILE COUNTIES IN SOUTHWEST
  ALABAMA...

* UNTIL 600 AM CDT

* AT MIDNIGHT CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR
  CONTINUES TO INDICATE MODERATE TO HEAVY RAIN FROM NUMEROUS SHOWERS
  AND SCATTERED THUNDERSTORMS THAT WILL CONTINUE TO MOVE NORTHEAST
  ACROSS THE WARNED AREA OVERNIGHT. RADAR RAINFALL ESTIMATES
  INDICATE WIDESPREAD AREAS OF 1 TO 3 INCHES OF RAIN HAD ALREADY 
  FALLEN ACROSS PORTIONS OF SOUTHWEST ALABAMA THROUGH THE AFTERNOON 
  AND EVENING HOURS. SOME ISOLATED LOCATIONS HAVE RECEIVED AS MUCH
  AS 4 INCHES.

* THUNDERSTORMS PRODUCING VERY HEAVY RAIN WILL OCCUR AROUND...
  CAMDEN...MONROEVILLE...TENSAW AND THE MOBILE METRO AREA THROUGH
  600 AM CDT...

EXPERTS AT THE HYDROMETEOROLOGICAL PREDICTION CENTER LOCATED IN CAMP 
SPRINGS MARYLAND...AND SHORT TERM MODEL DATA SUGGEST ADDITIONAL 
RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE WARNED AREA AS 
STORMS CONTINUE THROUGH THE OVERNIGHT HOURS.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
MOBILE.

LAT...LON 3228 8743 3205 8719 3206 8686 3176 8693
      3165 8712 3129 8740 3124 8761 3086 8763
      3044 8737 3028 8776 3065 8795 3069 8803
      3033 8813 3040 8842 3111 8842 3115 8794
      3145 8756 3183 8750 3185 8762 3201 8767
TIME...MOT...LOC 0504Z 232DEG 6KT 3173 8763 3037 8845

$$
JP

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 22, 7:31 PM CDT	Tornado Warning	MOB	Washington	29 min
Oct 22, 8:32 PM CDT	Tornado Warning	MOB	Clarke, Washington	43 min
Oct 22, 9:12 PM CDT	Tornado Warning	MOB	Clarke, Wilcox	33 min
Oct 22, 9:52 PM CDT	Flash Flood Warning	MOB	Choctaw, Clarke, Washington	6 hr
Oct 22, 9:52 PM CDT	Flash Flood Warning	MOB	Choctaw, Clarke, Washington	6 hr
Oct 22, 10:26 PM CDT	Tornado Warning	MOB	Clarke, Wilcox	18 min
Oct 23, 1:36 AM CDT	Tornado Warning	MOB	Butler	39 min
Oct 23, 2:14 AM CDT	Tornado Warning	MOB	Butler	31 min
Oct 23, 6:16 AM CDT	Tornado Warning	MOB	Baldwin	44 min

Nearby

Flash Flood Warnings in Alabama, 2007 Every flash flood warning in 2007

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.