Alert archive / Alabama / Flash Flood Warnings in 1991
Flash Flood Warning 9, NWS Mobile, AL
NWS Mobile, AL issued this flash flood warning at May 26, 1991, 4:04 AM CDT for Mobile County, Alabama. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- May 26, 1991, 4:04 AM CDT (09:04 UTC)
- Expired
- May 26, 1991, 7:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Mobile County, AL
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 9.1 hours before the alert went out and 152 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
- 336 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 646 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMOB 260905 FFWMOB ALC097-261200- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOBILE AL 404 AM CDT SUN MAY 26 1991 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 700 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHWEST ALABAMA ...MOBILE COUNTY VERY HEAVY RAINFALL HAS OCCURRED AND IS CONTINUING OVER MOBILE COUNTY ASSOCIATED WITH A STRONG NORTHWARD-MOVING LOW PRESSURE SYSTEM NOW CENTERED 10 MILES WEST OF THE MOBILE AIRPORT. THIS RAINFALL IS OCCURRING OVER ALREADY SATURATED GROUND. THE VOLUME OF RAINFALL NOW OCCURRING WILL PRODUCE FLASH FLOODING. IF YOU LIVE IN A FLOOD PRONE AREA AND THE WATER IS RISING...MOVE TO HIGHER GROUND IMMEDIATELY. MOTORISTS SHOULD EXERCISE EXTREME CAUTION. DO NOT ATTEMPT TO CROSS AN AREA OF RAPIDLY FLOWING WATER. RAINFALL AT THE MOBILE AIRPORT HAS TOTALLED MORE THAN ONE AND ONE-HALF INCHES DURING THE PAST HOUR. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, May 26, 3:29 AM CDT, 35 minutes before
ALZ013-015-016-MSZ014-013-261030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 325 AM CDT SUN MAY 26 1991 ...STRONG WINDS AND HEAVY RAIN FOR SOUTHWEST ALABAMA... A SMALL BUT TIGHTLY WOUND LOW PRESSURE SYSTEM DEVELOPED OVER THE NORTHERN GULF SHORTLY AFTER MIDNIGHT AND IS NOW MOVING ONSHORE ALONG THE ALABAMA-MISSISSIPPI STATE LINE WITH VERY HEAVY RAINFALL AND STRONG WINDS. THE MOBILE RADAR INDICATED THE CENTER WAS LOCATED 20 MILES SOUTHWEST OF MOBILE AT 315 PM. WORKERS ALONG THE MOBILE RIVER HAVE ESTIMATED WINDS OF 50 TO 60 MPH FROM THE SOUTHEAST DURING THE PAST FEW MINUTES. AT 200 AM DAUPHIN ISLAND REPORTED SOUTHEAST WINDS 41 WITH GUSTS TO 47 MPH. A GUST TO 43 MPH OCCURRED AT THE MOBILE AIRPORT JUST A FEW MINUTES AGO. AS THE LOW PRESSURE SYSTEM MOVES INLAND DURING THE NEXT HOUR AT ABOUT 15 MPH...THE VERY HEAVY RAINFALL AND WINDS OF 50 TO 60 MPH ARE EXPECTED TO CONTINUE. CONDITIONS SHOULD IMPROVE AS THE LOW GETS AWAY FROM MOBILE...BUT HEAVY RAINFALL IS LIKELY OVER THE INLAND COUNTIES OF SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA.
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 5:28 AM CDT | Flash Flood Warning | MOB | Washington | 3 hr |
Nearby
Flash Flood Warnings in Alabama, 1991Every flash flood warning in 1991
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.