Alert archive / Alabama / Flash Flood Warnings in 1997

Flash Flood Warning 13, NWS Mobile, AL

July 20, 1997Baldwin County, Mobile County, Alabama

NWS Mobile, AL issued this flash flood warning at Jul 20, 1997, 9:00 AM CDT for Baldwin County, Mobile County, 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 counties it named.

The facts

Issued: Jul 20, 1997, 9:00 AM CDT (14:00 UTC)
Expired: Jul 20, 1997, 3:00 PM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Whole counties

Counties Baldwin County, AL, Mobile County, AL

The radar

The Mobile radar (KMOB), 25 km from the middle of the area, began a volume at 14:02 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, 2.0 hours before the alert went out and 172 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: 1318 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 939 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 201403
FFWMOB
ALC003-097-202000-

BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
900 AM CDT SUN JUL 20 1997

THE NATIONAL WEATHER SERVICE IN MOBILE AL HAS EXTENDED THE
FLOOD WARNING UNTIL 300 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...

IN SOUTHWESTERN ALABAMA

   ...BALDWIN
   ...MOBILE

IN MOBILE COUNTY...THE FLOOD WARNING WILL CONTINUE IN EFFECT DUE TO HIGH
WATER REMAINING ON LOWLYING ROADWAYS AND IN OTHER FLOODPRONE AREAS.
ADDITIONAL RAINFALL SINCE MIDNIGHT HAS NOT BEEN SIGNIFICANT...
GENERALLY LESS THAN ONE-HALF INCH OVER THE FLOODED AREAS...BUT WATER
WILL BE SLOW TO DRAIN.  AS A RESULT...PEOPLE...ESPECIALLY MOTORISTS...
SHOULD NOT VENTURE INTO WATER COVERED LOW LYING AREAS.
THE MOST SERIOUSLY FLOODED AREAS CONTINUE TO BE IN THE SOUTHERN
PART OF MOBILE COUNTY...GENERALLY SOUTH OF HIGHWAY 90 AND EAST OF
BELLINGRATH ROAD.

IN BALDWIN COUNTY...AN ADDITIONAL 4 TO 8 INCHES OF RAIN HAS FALLEN
SINCE MIDNIGHT...AGGRAVATING THE FLOOD PROBLEMS OVER THE WESTERN
HALF OF THE COUNTY...GENERALLY WEST OF HIGHWAY 59.  PEOPLE IN THIS
PART OF THE COUNTY SHOULD STAY AWAY FROM FLOODED ROADWAYS AND OTHER
LOW LYING AREAS.

RAIN ASSOCIATED WITH DANNY CONTINUES T~O FALL OVER MUCH OF MOBILE
AND BALDWIN COUNTIES...WITH THE HEAVIEST RAIN OCCURRING OVER THE
DELTA AREA.  ADDITIONAL RAINFALL ACCUMULATIONS OF 2 TO 4 INCHES
ARE LIKELY OVER THIS AREA DURING THE NEXT FEW HOURS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 7:17 PM CDT	Flash Flood Warning	MOB	Baldwin	9 hr
Jul 20, 3:29 AM CDT	Flash Flood Warning	MOB	Baldwin, Mobile	6 hr
Jul 20, 3:00 PM CDT	Flash Flood Warning	MOB	Baldwin, Mobile	6 hr

Nearby

Flash Flood Warnings in Alabama, 1997 Every flash flood warning in 1997

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.