NWU Campus Weather & Impact Outlook

Potchefstroom, Mahikeng, Vanderbijlpark (Vaal) — WRF 3 km, convection-permitting — init 2026-08-23 06:00 UTC (20260823_06z). Times shown are SAST.

Demonstration product for campus operational planning -- thresholds are general published guidance, not locally calibrated. Not an official warning service (SAWS only). Irrigation Need / Evaporative Demand / Irrigation Scheduling reflect only model-simulated, rain-driven soil moisture -- they have no knowledge of any irrigation already applied. Drag the slider in each campus block (or tap the timeline) to see every category's status at one specific time together. See the national dashboard for methodology detail.

Potchefstroom Campus

Next 24h at a glance: STORM RAIN WIND HI WBGT THI FROST SPRAY FIRE SCHED

23 Aug
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
24 Aug
00:00
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
25 Aug
00:00
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
26 Aug
00:00
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00

Storm / Lightning

Storm/lightning-proxy risk (CAPE + graupel flux + reflectivity + hail)

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Heavy Rain

Hourly rainfall rate

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Wind

10 m wind gust

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Hours per day with damaging wind:

Date (SAST)Hours >=strong breezeHours >=gale
23 Aug00
24 Aug00
25 Aug00
26 Aug00

Heat Index

NWS apparent-temperature (temp + humidity, public-facing heat metric)

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Athlete Heat (WBGT)

Simplified outdoor Wet Bulb Globe Temperature

O
O
O
O
C
C
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
C
C
C
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
C
C
C
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O

Moderate heat load expected (peak WBGT approx 20 degC around 16:00 SAST). Athletes not yet used to these conditions should ease into full-intensity outdoor sessions and keep fluids available; a short acclimatization block is worth considering if this pattern continues.

Livestock Heat (THI)

Temperature-Humidity Index

O
O
O
O
O
O
O
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Species breakdown (peak THI ~68 over next 24h): Cattle: OK Sheep: OK Goats: OK Pigs: OK Poultry: OK

Frost

2 m temperature + radiative-cooling conditions

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Hours per night below each frost threshold:

Date (SAST)Hours <2CHours <0CHours <-2C
23 Aug000
24 Aug000
25 Aug000
26 Aug000

Spray Window

Rain-free + workable wind for agrochemical application

C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
C
O
C
O
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
O
O
O
O
O
O
O
O
O
O
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Fire Danger

Fire-weather proxy: low humidity + wind + within-window dry spell.

C
C
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
C
O
O
O
O
O
O
O
O
O
C
C
C
C
D
D
D
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
C
C
D
D
D
D
D
C
C
C
C
C
C
C
C
C
C
C
C
O
D
D

Irrigation Scheduling

Combines Irrigation Need + Evaporative Demand into one recommendation. Based only on model-simulated, rain-driven soil moisture -- not on any irrigation already applied.

W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
G
G
G
G
G
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
G
G
G
G
G
G
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W

Mahikeng Campus

Next 24h at a glance: STORM RAIN WIND HI WBGT THI FROST SPRAY FIRE SCHED

23 Aug
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
24 Aug
00:00
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
25 Aug
00:00
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
26 Aug
00:00
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00

Storm / Lightning

Storm/lightning-proxy risk (CAPE + graupel flux + reflectivity + hail)

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Heavy Rain

Hourly rainfall rate

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Wind

10 m wind gust

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Hours per day with damaging wind:

Date (SAST)Hours >=strong breezeHours >=gale
23 Aug00
24 Aug00
25 Aug00
26 Aug00

Heat Index

NWS apparent-temperature (temp + humidity, public-facing heat metric)

O
O
O
O
O
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Athlete Heat (WBGT)

Simplified outdoor Wet Bulb Globe Temperature

O
O
O
C
C
C
C
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
C
C
C
C
C
C
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
C
C
C
C
C
C
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O

Moderate heat load expected (peak WBGT approx 21 degC around 16:00 SAST). Athletes not yet used to these conditions should ease into full-intensity outdoor sessions and keep fluids available; a short acclimatization block is worth considering if this pattern continues.

Livestock Heat (THI)

Temperature-Humidity Index

O
O
O
O
C
C
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Species breakdown (peak THI ~70 over next 24h): Cattle: OK Sheep: OK Goats: OK Pigs: OK Poultry: OK

Frost

2 m temperature + radiative-cooling conditions

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Hours per night below each frost threshold:

Date (SAST)Hours <2CHours <0CHours <-2C
23 Aug000
24 Aug000
25 Aug000
26 Aug000

Spray Window

Rain-free + workable wind for agrochemical application

O
O
O
C
C
O
C
C
C
C
O
O
O
O
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
O
O
O
O
O
C
O
O
O
O
O
O
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C

Fire Danger

Fire-weather proxy: low humidity + wind + within-window dry spell.

C
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
C
O
O
O
O
O
O
O
C
O
C
C
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
C
D
D
D
D
D
D
D
C
C
C
C
C
C
C
C
O
O
O
C
D

Irrigation Scheduling

Combines Irrigation Need + Evaporative Demand into one recommendation. Based only on model-simulated, rain-driven soil moisture -- not on any irrigation already applied.

W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
G
G
G
G
G
G
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
G
G
G
G
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W

Vanderbijlpark (Vaal) Campus

Next 24h at a glance: STORM RAIN WIND HI WBGT THI FROST SPRAY FIRE SCHED

23 Aug
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
24 Aug
00:00
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
25 Aug
00:00
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00
09:00
10:00
11:00
12:00
13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
26 Aug
00:00
01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00

Storm / Lightning

Storm/lightning-proxy risk (CAPE + graupel flux + reflectivity + hail)

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Heavy Rain

Hourly rainfall rate

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Wind

10 m wind gust

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Hours per day with damaging wind:

Date (SAST)Hours >=strong breezeHours >=gale
23 Aug00
24 Aug00
25 Aug00
26 Aug00

Heat Index

NWS apparent-temperature (temp + humidity, public-facing heat metric)

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Athlete Heat (WBGT)

Simplified outdoor Wet Bulb Globe Temperature

O
O
O
O
O
C
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
C
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
C
C
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Moderate heat load expected (peak WBGT approx 19 degC around 15:00 SAST). Athletes not yet used to these conditions should ease into full-intensity outdoor sessions and keep fluids available; a short acclimatization block is worth considering if this pattern continues.

Livestock Heat (THI)

Temperature-Humidity Index

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Species breakdown (peak THI ~67 over next 24h): Cattle: OK Sheep: OK Goats: OK Pigs: OK Poultry: OK

Frost

2 m temperature + radiative-cooling conditions

O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O

Hours per night below each frost threshold:

Date (SAST)Hours <2CHours <0CHours <-2C
23 Aug000
24 Aug000
25 Aug000
26 Aug000

Spray Window

Rain-free + workable wind for agrochemical application

C
C
C
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
C
O
O
O
O
O
O
O
O
O
C
C
O
O
O
O
O
O
O
O
O
O
O
C
O
C
C
C
O
O
O
O
O
O

Fire Danger

Fire-weather proxy: low humidity + wind + within-window dry spell.

C
C
C
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
O
O
O
O
O
O
O
O
C
C
C
C
C
C
D
D
D
D
C
C
C
C
O
O
O
O
O
O
O
O
O
O
O
C
C
D
D
D
D
D
C
C
C
C
C
C
C
C
C
C
O
C
C
D
D

Irrigation Scheduling

Combines Irrigation Need + Evaporative Demand into one recommendation. Based only on model-simulated, rain-driven soil moisture -- not on any irrigation already applied.

W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
G
G
G
G
G
G
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
G
G
G
G
G
G
G
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W

← national impact dashboard (all cities)