Vanderbijlpark (Vaal) Campus Impact Outlook

Source: WRF d03 (3 km, convection-permitting) — init 2026-10-07 14:00 SAST (2026-10-07 12:00 UTC) (20261007_12z). Times shown are SAST.

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

Demonstration product for campus operational planning; see NWU campus dashboard for the full disclaimer. Not an official warning service (SAWS only). Drag the slider below (or tap any hour) to see every category's status at one specific time together.
Show:
O OK / favorable, no action needed C Caution / marginal, some care advised D Danger / act now, see the category's narrative below for specifics
08 Oct
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
09 Oct
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
10 Oct
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

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

Some storm risk near 17:00 SAST; have an indoor contingency ready.

Demonstration product; not an official warning service.

Isolated storm risk possible near 17:00 SAST; keep an eye on conditions if you're outdoors.

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

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

Moderate wind near 14:00 SAST; may affect ball sports/equipment.

Demonstration product; not an official warning service.

Breezy conditions possible near 14:00 SAST.

Demonstration product; not an official warning service.

More detail

Hours per day with damaging wind:

Date (SAST)Hours >=strong breezeHours >=gale
08 Oct00
09 Oct30
10 Oct10

Heat Index

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

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
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

Warm conditions near 13:00 SAST; stay hydrated if outdoors.

Demonstration product; not an official warning service.

Athlete Heat (WBGT)

Simplified outdoor Wet Bulb Globe Temperature

O
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
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 24 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.

Demonstration product; not an official warning service.

Livestock Heat (THI)

Temperature-Humidity Index

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

Moderate heat load near 10:00 SAST for all species; check water access.

Demonstration product; not an official warning service.

More detail

Species breakdown (peak THI ~74 over next 24h): Cattle: Caution Sheep: OK Goats: OK Pigs: Caution 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

No elevated risk expected this window; no adjustment needed.

Demonstration product; not an official warning service.

More detail

Hours per night below each frost threshold:

Date (SAST)Hours <2CHours <0CHours <-2C
08 Oct000
09 Oct000
10 Oct000

Spray Window

Delta-T 2-8 (the number on a Delta-T meter), wind 3-15 km/h, no rain now or in the next 2 h, not after dark in calm air (inversions)

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

No good spray window in this period; rain, strong wind or Delta-T above 10 through 12:00 SAST.

Demonstration product; not an official warning service.

Fire Danger

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

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

Fire danger high around 17:00 SAST; postpone any planned burns and have fire-fighting equipment on standby.

Demonstration product; not an official warning service.

Fire danger high around 17:00 SAST; no open flames or uncontrolled burning.

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
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C

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