Rustenburg Impact Outlook

Source: WRF d02 — init 2026-09-20 02:00 SAST (2026-09-20 00:00 UTC) (20260920_00z). Times shown are SAST.

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

Demonstration product; see dashboard for the full disclaimer. Not an official warning service. Drag the slider below (or tap a timeline) to see every category's status at one specific time together.

O OK / favorable, no action needed C Caution / marginal, some care advised D Danger / act now, see the category's narrative below for specifics

20 Sep
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

21 Sep
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

22 Sep
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

23 Sep
00:00

01:00

02:00

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

No elevated risk expected this window; no adjustment needed.

Demonstration product; not an official warning service.

No elevated risk expected this window; no adjustment needed.

Demonstration product; not an official warning service.

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

No elevated risk expected this window; no adjustment needed.

Demonstration product; not an official warning service.

No elevated risk expected this window; no adjustment needed.

Demonstration product; not an official warning service.

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

No elevated risk expected this window; no adjustment needed.

Demonstration product; not an official warning service.

No elevated risk expected this window; no adjustment needed.

Demonstration product; not an official warning service.

Hours per day with damaging wind:

Date (SAST)	Hours >=strong breeze	Hours >=gale
20 Sep	0	0
21 Sep	0	0
22 Sep	0	0
23 Sep	0	0

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

No elevated risk expected this window; no adjustment needed.

Demonstration product; not an official warning service.

Athlete Heat (WBGT)

Simplified outdoor Wet Bulb Globe Temperature

O

O

O

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

O

O

O

O

O

O

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

O

O

O

O

O

O

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

Moderate heat load expected (peak WBGT approx 22 degC around 17:00 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.

Demonstration product; not an official warning service.

Livestock Heat (THI)

Temperature-Humidity Index

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

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

C

C

O

O

O

O

O

O

Moderate heat load near 14:00 SAST for all species; check water access.

Demonstration product; not an official warning service.

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

No elevated risk expected this window; no adjustment needed.

Demonstration product; not an official warning service.

Hours per night below each frost threshold:

Date (SAST)	Hours <2C	Hours <0C	Hours <-2C
20 Sep	0	0	0
21 Sep	0	0	0
22 Sep	0	0	0
23 Sep	0	0	0

Spray Window

Rain-free + workable wind for agrochemical application

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

O

D

D

O

O

D

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

O

O

O

O

O

O

C

C

O

D

O

O

O

O

No safe spray window in this period; rain or high wind expected through 22:00 SAST.

Demonstration product; not an official warning service.

Fire Danger

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

O

O

O

O

O

O

C

C

C

O

O

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

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

C

O

O

O

Elevated fire risk near 12:00 SAST; check any planned burning against this window.

Demonstration product; not an official warning service.

Elevated fire risk near 12:00 SAST.

Demonstration product; not an official warning service.

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.

O

O

O

O

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

O

O

O

O

O

O

O

O

O

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

O

O

O

O

O

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

O

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