National Weather Service United States Department of Commerce

Severe Thunderstorms With Heavy Rain Possible In The Upper Midwest; Excessive Heat For Central U.S.

Several rounds of strong to severe thunderstorms will be possible from the northern Plains and upper Midwest to the Great Lakes through Friday. Damaging winds, large hail, and flooding will be the primary threats with these storms. Excessive heat will grip the central Plains with heat indices approaching 105 to 110 degrees. Very hot and humid conditions are likely to expand into the Mid Atlantic. Read More >

NWS Shreveport Aviation Weather Services
 
Local TAFs
LOUISIANA
Shreveport Regional (SHV) Monroe (MLU)
Tactical Decision Aid Tactical Decision Aid

346
FTUS44 KSHV 210540
TAFSHV
TAF
KSHV 210540Z 2106/2206 00000KT P6SM SKC
FM211500 25005KT P6SM SCT035
FM212100 18005KT P6SM SCT050
FM220200 16004KT P6SM SCT250=

347
FTUS44 KSHV 210540
TAFMLU
TAF
KMLU 210540Z 2106/2206 00000KT P6SM SKC
FM211500 VRB03KT P6SM SCT035
FM211900 16003KT P6SM SCT050
FM220200 16003KT P6SM SCT250=
   
TEXAS
Tyler (TYR) Longview (GGG)
Tactical Decision Aid Tactical Decision Aid
267
FTUS44 KSHV 210540
TAFTYR
TAF
KTYR 210540Z 2106/2206 17004KT P6SM SKC
     FM211500 23006KT P6SM SCT035
     FM212000 16006KT P6SM SCT050
     FM220200 15005KT P6SM SCT250=
264
FTUS44 KSHV 210540
TAFGGG
TAF
KGGG 210540Z 2106/2206 17004KT P6SM SKC
     FM211500 24006KT P6SM SCT035
     FM212000 17005KT P6SM SCT050
     FM220200 16004KT P6SM SCT250=
Lufkin (LFK)
Tactical Decision Aid

266
FTUS44 KSHV 210540
TAFLFK
TAF
KLFK 210540Z 2106/2206 18004KT P6SM SKC
FM211500 VRB05KT P6SM SCT035
FM212000 16004KT P6SM SCT050
FM220200 16004KT P6SM SCT250=
   
ARKANSAS
Texarkana (TXK) El Dorado (ELD)
Tactical Decision Aid Tactical Decision Aid
345
FTUS44 KSHV 210540
TAFTXK
TAF
KTXK 210540Z 2106/2206 14004KT P6SM SKC
     FM211500 25005KT P6SM SCT035
     FM212100 18005KT P6SM SCT050
     FM220200 16004KT P6SM SCT250=
265
FTUS44 KSHV 210540
TAFELD
TAF
KELD 210540Z 2106/2206 00000KT P6SM SKC
     FM211500 VRB05KT P6SM SCT035
     FM212000 16004KT P6SM SCT050
     FM220200 16004KT P6SM SCT250=
 
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Regional TAFs
LOUISIANA
Alexandria (AEX) Baton Rouge (BTR)
Tactical Decision Aid Tactical Decision Aid
546
FTUS44 KLCH 210520
TAFAEX
TAF
KAEX 210520Z 2106/2206 VRB02KT P6SM SKC
     FM211800 VRB05KT P6SM FEW050
     FM220100 VRB03KT P6SM SCT250=
771
FTUS44 KLIX 210520
TAFBTR
TAF
KBTR 210520Z 2106/2206 00000KT P6SM FEW200
     FM211900 VRB03KT P6SM BKN100 PROB30 2119/2123 4SM -TSRA
      OVC040CB
     FM220500 20004KT P6SM SCT150=
Lake Charles (LCH) New Orleans (MSY)
Tactical Decision Aid Tactical Decision Aid

367
FTUS44 KLCH 210520
TAFLCH
TAF
KLCH 210520Z 2106/2206 VRB03KT P6SM SKC
FM211800 22007KT P6SM VCTS SCT050CB
FM220100 VRB03KT P6SM SKC=

543
FTUS44 KLIX 210520
TAFMSY
TAF
KMSY 210520Z 2106/2206 25004KT P6SM FEW010 FEW250
FM211600 36004KT P6SM BKN110 PROB30 2118/2122 4SM -TSRA
OVC040CB
FM220000 19006KT P6SM SCT110=
 
TEXAS
College Station (CLL) Dallas/Fort Worth International (DFW)
Tactical Decision Aid Tactical Decision Aid
000
FTUS44 KHGX 210520
TAFCLL
TAF
KCLL 210520Z 2106/2206 17007KT P6SM SCT250
     FM211500 21005KT P6SM FEW050
     FM211900 15007KT P6SM SCT060=
423
FTUS44 KFWD 210520
TAFDFW
TAF
KDFW 210520Z 2106/2212 14010KT P6SM SKC=
Dallas-Love Field (DAL) Houston-Bush Intercontinental (IAH)
Tactical Decision Aid Tactical Decision Aid
406
FTUS44 KFWD 210520
TAFDAL
TAF
KDAL 210520Z 2106/2206 14010KT P6SM SKC=
000
FTUS44 KHGX 210520
TAFIAH
TAF
KIAH 210520Z 2106/2212 19004KT P6SM SCT250
     FM211000 VRB03KT P6SM FEW025
     FM211700 VRB04KT P6SM SCT050 SCT250
     FM212000 14007KT P6SM VCSH SCT060 SCT250
     FM220200 16005KT P6SM SCT250=
Houston-Hobby (HOU)
Tactical Decision Aid
000
FTUS44 KHGX 210520
TAFHOU
TAF
KHOU 210520Z 2106/2206 19004KT P6SM SCT250
     FM211000 VRB03KT P6SM FEW025 SCT250
     FM211900 15006KT P6SM VCTS SCT050CB SCT250
     FM212300 16008KT P6SM FEW060 SCT250=
 
ARKANSAS
Hot Springs (HOT) Little Rock (LIT)
Tactical Decision Aid Tactical Decision Aid
677
FTUS44 KLZK 210520
TAFHOT
TAF
KHOT 210520Z 2106/2206 VRB03KT P6SM SKC
     FM211500 22007KT P6SM SCT045 SCT250
     FM220000 VRB03KT P6SM SCT250=
772
FTUS44 KLZK 210520
TAFLIT
TAF
KLIT 210520Z 2106/2206 17003KT P6SM SKC
     FM211500 22006KT P6SM SCT045 SCT250
     FM220000 VRB03KT P6SM SCT250=
Pine Bluff (PBF)
Tactical Decision Aid
550
FTUS44 KLZK 210520
TAFPBF
TAF
KPBF 210520Z 2106/2206 VRB03KT P6SM SKC
     FM211500 22006KT P6SM SCT045 SCT250
     FM220000 VRB03KT P6SM SCT250=
 
OKLAHOMA
McAlester (MLC) Oklahoma City-Will Rogers (OKC)
Tactical Decision Aid Tactical Decision Aid
226
FTUS44 KTSA 210520
TAFMLC
TAF
KMLC 210520Z 2106/2206 14004KT P6SM SKC
     FM211500 19011KT P6SM SCT050
     FM220100 16005KT P6SM SKC=
000
FTUS44 KOUN 210520
TAFOKC
TAF
KOKC 210520Z 2106/2206 18010KT P6SM FEW080=
Tulsa International (TUL)
Tactical Decision Aid
593
FTUS44 KTSA 210520
TAFTUL
TAF
KTUL 210520Z 2106/2206 16009KT P6SM SKC
     FM211500 19011G18KT P6SM FEW060
     FM220100 17010KT P6SM SKC=
 
NWS-Shreveport Aviation Forecast Discussion
 
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Flight Category Definitions
Category Ceilings And/Or Visibilities
VFR Greater than 3000 ft AND Greater than 5 SM
MVFR Greater than or equal to 1000 ft, but less than or equal to 3000 ft AND/OR Greater than or equal to 3 SM, but less than or equal to 5 SM
IFR Greater than or equal to 500 ft, but less than 1000 ft AND/OR Greater than or equal to 1 SM, but less than 3 SM
LIFR Less than 500 ft AND/OR Less than 1 SM
 
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Southern Plains Southern Mississippi Valley
Southern Plains radar loop Southern Mississippi Valley radar loop
   
Shreveport (SHV) Base Reflectivity 0.5º Shreveport (SHV) Base Velocity 0.5º
Shreveport Radar Base Reflectivity 0.5 degrees Shreveport Radar Base Velocity 0.5 degrees
   
Fort Polk (POE) Base Reflectivity 0.5º Fort Polk (POE) Base Velocity 0.5º
Fort Polk Radar Base Reflectivity 0.5 degrees Fort Polk Radar Base Velocity 0.5 degrees
 
Fort Smith (SRX) Base Reflectivity 0.5º Fort Smith (SRX) Base Velocity 0.5º
Fort Smith Radar Base Reflectivity 0.5 degrees Fort Smith Radar Base Velocity 0.5 degrees
 
Little Rock (LZK) Base Reflectivity 0.5º Little Rock (LZK) Base Velocity 0.5º
Little Rock Radar Base Reflectivity 0.5 degrees Little Rock Radar Base Velocity 0.5 degrees
 
Inola (INX) Base Reflectivity 0.5º Inola (INX) Base Velocity 0.5º
Inola Radar Base Reflectivity 0.5 degrees Inola Radar Base Velocity 0.5 degrees
 
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Latest Observed Sounding from Shreveport
 
RAP Vertical Wind Forecasts
Shreveport Regional Airport (SHV) Monroe Regional Airport (MLU)
RAP Vertical Wind Forecast for Shreveport RAP Vertical Wind Forecast for Monroe
Tyler Pounds Regional Airport (TYR) Longview-East Texas Regional Airport (GGG)
RAP Vertical Wind Forecast for Tyler RAP Vertical Wind Forecast for Longview
Lufkin-Angelina County Airport (LFK) Texarkana Regional Airport-Webb Field (TXK)
RAP Vertical Wind Forecast for Lufkin RAP Vertical Wind Forecast for TXK
El Dorado-South Arkansas Regional Airport (ELD)
RAP Vertical Wind Forecast for El Dorado
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Latest Area Forecast Discussion (AFD)
000
FXUS64 KSHV 210448
AFDSHV

Area Forecast Discussion
National Weather Service Shreveport LA
1148 PM CDT Thu Jul 20 2017

.AVIATION...
For the 21/06z TAFs, VFR conditions should prevail at all TAF
sites for the duration of the period with wind speeds remaining
below 10 kts. Isolated convection is possible just about anywhere
during peak daytime heating. However, convective coverage is
expected to be so spotty that chances of showers or storms at any
individual site are too low to warrant a mention in the TAFs at
this time.

CN

&&

.PREV DISCUSSION... /issued 947 PM CDT Thu Jul 20 2017/

DISCUSSION...
Much of the afternoon cu field and very isolated -SHRA have diminished
this evening with the loss of heating, with weak H850-700 ridging
expected to linger over the region overnight through Friday. 02Z
temps are nearly identical to what was observed 24 hours ago,
albeit max temps were about a degree higher today than Wednesday.
Feel like min temps late tonight should be very similar to what
was observed this morning, with upper 70s possible over the more
urbanized areas. Did make some minor tweak to min temps, which
resulted in a 1 category adjustment to the forecast, thus have
updated the zones to account for this.

Should see Heat Advisory criteria again be met again Friday
afternoon over much of the region, with the potential for more in
the way of isolated afternoon/evening convection over Ncntrl LA
and portions of Deep E TX as the weak upper trough noted on the
water vapor imagery over Nrn FL retrogrades slowly W along the
Gulf coast. There still remains some uncertainty in the progs this
evening regarding the position of this upper trough Saturday, and
its impacts of cloud cover/more in the way of isolated/sct
convection especially over the Srn and Ern sections of the region,
which would influence cloud cover and max temps. Rather than
locking later shifts into a Heat Advisory extension, which still
may be needed for portions of the region Saturday, have not made
any changes to the existing advisory and will allow later shifts
to address this potential need after coordinating with adjacent
WFO`s.

Thank you WFO LZK for coordination this evening. Zone update
already out...grids will be available shortly.

15

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  77  97  77  93 /   0  20  20  30
MLU  76  97  76  93 /   0  20  20  30
DEQ  74  97  73  95 /   0  10  10  10
TXK  76  96  76  94 /   0  10  10  20
ELD  74  96  74  93 /   0  20  20  30
TYR  76  96  77  94 /   0  20  20  20
GGG  76  96  77  93 /   0  20  20  20
LFK  75  95  75  93 /   0  20  20  30

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...Heat Advisory until 7 PM CDT Friday for ARZ050-051-059>061-
     070>073.

LA...Heat Advisory until 7 PM CDT Friday for LAZ001>006-010>014-
     017>022.

OK...Heat Advisory until 7 PM CDT Friday for OKZ077.

TX...Heat Advisory until 7 PM CDT Friday for TXZ096-097-108>112-
     124>126-136>138-149>153-165>167.

&&

$$

09/15

   
Latest Hazardous Weather Outlook
000
FLUS44 KSHV 201452
HWOSHV

Hazardous Weather Outlook
National Weather Service Shreveport LA
952 AM CDT Thu Jul 20 2017

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-211200-
Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette-
Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-
Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-
Grant-Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp-
Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk-
Panola-Nacogdoches-Shelby-Angelina-San Augustine-
952 AM CDT Thu Jul 20 2017

This Hazardous Weather Outlook is for portions of south central
Arkansas, southwest Arkansas, north central Louisiana, northwest
Louisiana, southeast Oklahoma, east Texas and northeast Texas.

.DAY ONE...This afternoon and Tonight...

A Heat Advisory is in effect for today. With temperatures
forecast to climb into the mid to upper 90s and increased low-
level moisture in place, afternoon heat index values will climb to
near 105 degrees. Precautions should be taken to prevent heat
related injuries, including drinking plenty of water while
outdoors.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday...

An upper level ridge of high pressure will maintain hot
temperatures with a slight chance of afternoon showers and
thunderstorms through the end of this work week. With temperatures
climbing into the mid and possibly upper 90s, afternoon heat
index values will climb to near 105 degrees once again on Friday.
A heat advisory remains in effect through Friday evening. The
ridge of high pressure will weaken this weekend with the approach
of a couple of weak upper level disturbances and an associated
weak cold frontal system, which should result in increasing
chances of scattered showers and thunderstorms, and slightly
cooler temperatures for the weekend into early next week.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel, amateur radio
operators, and storm spotters will not be needed through tonight.


$$

13

 
 

 

 
IMPORTANT: This page is a tool to help pilots better visualize weather and weather-related hazards, and is not a substitute for a weather briefing obtained from a Flight Service Station (1-800-WXBRIEF). The information contained here does not meet the FAA requirements for a pre-flight weather brief. Therefore, it is important that pilots call and obtain a briefing from an FAA Flight Service Specialist.