Area Forecast Discussion
Issued by NWS Shreveport, LA
Issued by NWS Shreveport, LA
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
721 FXUS64 KSHV 031607 AFDSHV Area Forecast Discussion National Weather Service Shreveport LA 1107 AM CDT Wed Jul 3 2024 ...New UPDATE... .UPDATE... Issued at 1059 AM CDT Wed Jul 3 2024 No major wholesale updates are required to the forecast package at this time. Based on aggressive warming trends this morning, nudged a few sites up by 1 degree for afternoon highs, but stubborn surface level moisture should prevent runaway heating into the afternoon. Still looking for highs near the century mark across much of the region this afternoon, with heat indices between 105 and 115 degrees. Model guidance shows little to no convection this afternoon, as the apex of the ridging fixes itself over the ArkLaTex. Ingested the most recent several hours of temperature and dew point obs and interpolated through 00Z. /26/ && .SHORT TERM... (Wednesday through Thursday) Issued at 220 AM CDT Wed Jul 3 2024 Bottom line up front...it is going to be hot for Independence Day. High pressure will remain over the region through Thursday, allowing temperatures to soar into the upper 90s to near 100 degrees. Mix this with higher humidity values and we will see heat index values range from around 105 to 113 degrees across the area. As a result, Heat Advisory remains in effect for some of our east Texas counties along with McCurtain county with an Excessive Heat Warning for the remainder of the region. Changes to these product was the addition of Angelina and Nacogdoches counties into the Excessive Heat Warning and then I have decided to extend the products out through 8:00 PM Thursday evening. Main reason for this is for messaging purposes. With the amount of people expected to be spending time outdoors on Thursday, we wanted to make sure to message early that it is going to be hot, not to mention that the numbers support the extension. Very isolated showers and thunderstorms will remain possible across much of the region this afternoon. Yesterday we had some showers pop up as far north as the I-30 corridor. Nonetheless, the best chances remain across our southern zones, but I can`t rule out a random shower or two outside the areas of greatest PoPs. For Independence Day, the best chances for some of natures fireworks will be across our south and eastern zones, however, a stray shower or two could be possible once again outside of the highest PoPs. /33/ && .LONG TERM... (Thursday Night through Wednesday) Issued at 220 AM CDT Wed Jul 3 2024 There is some good news and some bad news about the long-term portion of the forecast. The good news is, there seems to be a little pattern shift as we head into the weekend that could bring some widespread rain chances to the area in addition to some relief from the heat we have been seeing. Especially for Saturday and Sunday, guidance is suggesting temperatures in the upper 80s to lower 90s across the region. The bad news is that heat indices appear to remain in the upper 90s to lower 100s. Even better, these "cooler" ambient temperatures will continue into the start of next week and there is a chance that we might not need the heat products that seem to be endless right now. The precipitation potential towards the end of the week and into the weekend is due to the stubborn upper-level ridge finally shifting far enough to the east and an upper-level trough digging into the Plains. An associated frontal boundary at the surface will begin to push south and into our region by early Friday morning across our northern zones before spreading through the remainder of the area during the day. This frontal boundary will stall out across our northern zones as we head into the rest of the weekend, allowing for additional showers and thunderstorms to develop and move through the area for both Saturday and Sunday. From here, all eyes continue to turn to the Gulf of Mexico as what is now Hurricane Beryl decides where it wants to go. The GFS (yes it is only one model solution) has Beryl heading into far south Texas with another disturbance following behind it and then tracking through our region. With the amount of heat and lack of rain, this moisture might be welcomed with open arms to some. /33/ && .AVIATION... (12Z TAFS) Issued at 632 AM CDT Wed Jul 3 2024 VFR flight conditions should prevail at all TAF sites for the next 24 hours. Isolated showers and thunderstorms associated with the sea breeze may affect portions of Deep East Texas eastward into Central Louisiana between 03/18z-04/02z, but overall rain chances at KLFK remain low. Southerly surface winds should also persist with sustained speeds remaining below 10 kts. CN && .PRELIMINARY POINT TEMPS/POPS... SHV 102 82 99 81 / 10 0 10 10 MLU 99 78 97 79 / 20 10 20 10 DEQ 98 77 97 74 / 10 0 10 30 TXK 101 80 99 78 / 10 10 10 20 ELD 99 78 97 76 / 10 10 10 20 TYR 99 80 99 78 / 0 0 0 10 GGG 99 79 98 78 / 10 10 0 10 LFK 98 77 97 77 / 20 10 10 0 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...Excessive Heat Warning until 8 PM CDT Thursday for ARZ050-051- 059>061-070>073. LA...Excessive Heat Warning until 8 PM CDT Thursday for LAZ001>006- 010>014-017>022. OK...Heat Advisory until 8 PM CDT Thursday for OKZ077. TX...Excessive Heat Warning until 8 PM CDT Thursday for TXZ097-112- 126-138-150>153-165>167. Heat Advisory until 8 PM CDT Thursday for TXZ096-108>111-124-125- 136-137-149. && $$ SHORT TERM...26 LONG TERM....33 AVIATION...09