377
FNUS74 KLIX 011750
FWSLIX

Spot Forecast for Roseland Event...Tangipahoa Parish Emergency Management
National Weather Service New Orleans LA
1250 PM CDT Mon Sep 1 2025

If conditions become unrepresentative, contact the National Weather
Service.

We can be reached at (985) 649-0357 if you have questions or concerns
with this forecast.

.DISCUSSION...

With a front continuing to drift offshore, only isolated chances
of showers or storms are anticipated today. There may be a
slightly better chance of precipitation on Tuesday as a
reinforcing frontal boundary approaches the area from the
northwest. Afternoon RH values are likely to be in the 45 to
55 percent range for some areas north of the Interstate 10 and
12 corridors today and Tuesday, and near or above 60 percent
south of Lake Pontchartrain. Outside of any convection, winds
will generally be light under 15 mph, keeping fire weather
concerns low.


.REST OF TODAY...

Sky/weather.........Mostly sunny (30-40 percent).
Chance of pcpn......10 percent.
Max temperature.....Around 90.
Min humidity........47 percent.
Max apparent temp...93.
Surface winds (mph).East winds 6 to 7 mph.
Mixing height (m)...1798-1981 meters AGL.
Transport winds.....East 8 to 9 mph.
Transport winds m/s.East around 4 meters/second.
CEILING (KFT).......25.
Wind (20 ft)........East winds 5 to 6 mph.

TIME (CDT)      1PM 2PM 3PM 4PM 5PM
Sky (%).........39  38  35  37  38
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   10  10  10
Temp............88  89  90  89  87
RH..............52  50  47  50  53
Aparnt tmp (F)..92  93  93  93  91
20 FT wind dir..E   E   E   E   ENE
20 FT wind spd..6   7   7   7   6
20 FT wind gust.9   10  10  10  9
Surface wnd dir.E   E   E   E   ENE
Surface wnd spd.6   7   7   7   6
Surface wnd gst.9   10  10  10  9
Mix hgt (km)....1.8 1.8 1.8 2.0 2.0
Transp wind dir.E   E   E   E   E
Transp wind spd.9   9   9   8   8
Trans wind dir..E   E   E   E   E
Trans spd (m/s).4   4   4   4   4
Ceiling (kft)...25  25  25  25  25

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent).
Chance of pcpn......10 percent.
Min temperature.....Around 69.
Max humidity........93 percent.
Max apparent temp...88.
Surface winds (mph).East winds around 6 mph becoming light.
Mixing height (m)...122-1981 meters AGL.
Transport winds.....East 5 to 8 mph.
Transport winds m/s.East 2 to 4 meters/second.
CEILING (KFT).......25 decreasing to 11 early in the evening, then
                    increasing to 25 in the late evening and
                    overnight.
Wind (20 ft)........East winds around 5 mph becoming light.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........44  42  42  37  30  27  25  24  26  31  23  23
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).10  10  0   0   0   0   0   0   0   0   0   0
Temp............85  82  79  77  75  73  72  72  72  71  71  70
RH..............57  65  74  79  84  90  90  90  90  93  90  93
Aparnt tmp (F)..88  85  79  77  75  73  72  72  72  71  71  70
20 FT wind dir..E   ESE SSE SSE ESE E   E   ENE ENE NE  NE  NE
20 FT wind spd..6   6   3   2   2   2   1   1   1   1   2   2
20 FT wind gust.9   9   6   3   3   3   2   2   2   2   3   3
Surface wnd dir.E   ESE SSE SSE ESE E   E   ENE ENE NE  NE  NE
Surface wnd spd.6   6   3   2   2   2   1   1   1   1   2   2
Surface wnd gst.9   9   6   3   3   3   2   2   2   2   3   3
Mix hgt (km)....2.0 0.2 0.2 0.2 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1
Transp wind dir.E   SE  SE  SE  SE  SE  SE  E   E   E   ENE ENE
Transp wind spd.8   7   7   7   6   6   6   5   5   5   5   5
Trans wind dir..E   SE  SE  SE  SE  SE  SE  E   E   E   ENE ENE
Trans spd (m/s).4   3   3   3   3   3   3   2   2   2   2   2
Ceiling (kft)...25  25  11  11  25  25  25  25  25  25  25  25

.TUESDAY...

Sky/weather.........Sunny (15-25 percent). Slight chance of showers
                    and thunderstorms late in the afternoon.
Chance of pcpn......20 percent.
Max temperature.....Around 90.
Min humidity........45 percent.
Max apparent temp...93.
Surface winds (mph).East winds around 5 mph increasing to around 6
                    mph in the afternoon, then shifting to the
                    northeast around 5 mph late in the afternoon.
Mixing height (m)...122-1890 meters AGL.
Transport winds.....East 5 to 8 mph.
Transport winds m/s.East 2 to 4 meters/second.
CEILING (KFT).......25 decreasing to 11 late in the afternoon.
Wind (20 ft)........Light winds becoming east around 5 mph in the
                    afternoon, then becoming light late in the
                    afternoon. Gusty and erratic winds expected
                    near thunderstorms late in the afternoon.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........23        12        13        19
Weather cov.....                              S CHC
Weather type....NONE      NONE      NONE      RNSHWR
Tstm cov........                              S CHC
Chc of pcpn (%).0         0         10        20
Temp............69        78        87        90
RH..............97        74        53        47
Aparnt tmp (F)..69        78        91        93
20 FT wind dir..NE        E         ENE       ENE
20 FT wind spd..2         3         6         6
20 FT wind gust.3         6         9         9
Surface wind....NE 2G3    E 3G6     ENE 6G9   ENE 6G9
Mix hgt (m).....120       120       760       1800
Transp wind dir.ENE       ENE       E         E
Transp wind spd.5         7         8         7
Trans wind dir..ENE       ENE       E         E
Trans spd (m/s).2         3         4         3
Ceiling (kft)...25        25        25        11

$$
Forecaster...LISNEY
Requested by...Dawson Primes
Type of request...HAZMAT
.TAG 2520617.9/LIX
.DELDT 09/01/25
.FormatterVersion 2.0.0
.EMAIL sr-lix.forecasters@noaa.gov,vtravis@tangipahoa.org,dawson.primes@tangipahoa.org,loesel.matthew@epa.gov