KGUS TAF
Terminal aerodrome forecast for Grissom ARB (GUS · KGUS), Peru, IN. Issued 20 Sep 2026 2100Z, valid 2100Z to 0300Z, decoded period by period below. · Open on the map
All of Grissom ARB — runways, frequencies, charts and live weatherTAF issued 20 Sep 2026 2100Z
valid 2100Z to 0300ZTAF KGUS 202100Z 2021/2203 03012KT 9999 -DZ BKN009 OVC040 QNH2989INS TEMPO 2021/2024 05010G15KT 6000 -SHRA BKN005 OVC010 BECMG 2100/2101 06010G15KT 6000 -DZ BKN007 OVC015 QNH2995INS BECMG 2104/2105 06015G25KT 6000 -DZ BKN007 OVC015 QNH3002INS TEMPO 2105/2111 0800 DZ OVC004 BECMG 2111/2112 06015G25KT 9999 VCSH BKN007 OVC015 QNH3006INS BECMG 2202/2203 05010G15KT 9999 NSW BKN015 OVC025 QNH3013INS TX23/2021Z TN13/2110Z LAST NO AMDS AFT 2103 NEXT 2113
Times are UTC (Zulu), as they appear in the bulletin.
Period by period
| Period (UTC) | Change | Wind | Vis | Ceiling | Sky | Cat |
|---|---|---|---|---|---|---|
| 2100Z to 0000Z | Initial | 030° at 12 kt | 6+ SM | 900 ft BKN | Broken at 900 ft AGL, Overcast at 4,000 ft AGL | IFR |
| 2100Z to 0000Z | TEMPO | 050° at 10-15 kt | 3.73 SM | 500 ft BKN | Broken at 500 ft AGL, Overcast at 1,000 ft AGL | IFR |
| 0000Z to 0400Z | BECMG | 060° at 10-15 kt | 3.73 SM | 700 ft BKN | Broken at 700 ft AGL, Overcast at 1,500 ft AGL | IFR |
| 0400Z to 1100Z | BECMG | 060° at 15-25 kt | 3.73 SM | 700 ft BKN | Broken at 700 ft AGL, Overcast at 1,500 ft AGL | IFR |
| 0500Z to 1100Z | TEMPO | Calm | 0.5 SM | 400 ft OVC | Overcast at 400 ft AGL | LIFR |
| 1100Z to 0200Z | BECMG | 060° at 15-25 kt | 6+ SM | 700 ft BKN | Broken at 700 ft AGL, Overcast at 1,500 ft AGL | IFR |
| 0200Z to 0300Z | BECMG | 050° at 10-15 kt | 6+ SM | 1,500 ft BKN | Broken at 1,500 ft AGL, Overcast at 2,500 ft AGL | MVFR |
What the change groups mean
- TEMPO
- Temporary — expected for less than half the period, in spells under an hour.
- BECMG
- Becoming — a gradual change over the stated window.
What the categories mean
- IFR
- Instrument flight rules — ceiling 500 to 999 ft and/or visibility 1 to less than 3 SM.
- LIFR
- Low IFR — ceiling below 500 ft and/or visibility less than 1 SM.
- MVFR
- Marginal VFR — ceiling 1,000 to 3,000 ft and/or visibility 3 to 5 SM.
Frequently asked
What is the current TAF for KGUS?
The forecast issued 20 Sep 2026 2100Z for Grissom ARB reads: TAF KGUS 202100Z 2021/2203 03012KT 9999 -DZ BKN009 OVC040 QNH2989INS TEMPO 2021/2024 05010G15KT 6000 -SHRA BKN005 OVC010 BECMG 2100/2101 06010G15KT 6000 -DZ BKN007 OVC015 QNH2995INS BECMG 2104/2105 06015G25KT 6000 -DZ BKN007 OVC015 QNH3002INS TEMPO 2105/2111 0800 DZ OVC004 BECMG 2111/2112 06015G25KT 9999 VCSH BKN007 OVC015 QNH3006INS BECMG 2202/2203 05010G15KT 9999 NSW BKN015 OVC025 QNH3013INS TX23/2021Z TN13/2110Z LAST NO AMDS AFT 2103 NEXT 2113
How far ahead does a TAF forecast?
A TAF covers a 24-hour period at most airports and 30 hours at larger ones, issued four times a day at 0000Z, 0600Z, 1200Z and 1800Z. It describes conditions within roughly 5 statute miles of the airport, not the surrounding area.
What do FM, BECMG and TEMPO mean?
FM (from) marks a rapid, permanent change at the stated time. BECMG (becoming) marks a gradual change over the stated window. TEMPO marks conditions expected for less than half the period, in spells of under an hour each. PROB30 and PROB40 give the probability of the conditions that follow.
More about KGUS
Forecasts from the US National Weather Service Aviation Weather Center. Times are UTC (Zulu). For planning and education only — always confirm with an official preflight briefing.
Something here wrong or out of date? Report a data problem.