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An Actual GoNoGo WX Daily Briefing

The briefing below was produced by the same daily briefing system subscribers receive each morning. Every call, time, reading and outlook on it came from that system. Nothing on this page was written to look like a briefing.

Real GoNoGo WX briefing · curated example

This briefing was generated by GoNoGo WX for Vista, an example boat, and saved as a public example for Thursday, August 27. The conditions shown are historical and should not be used for a boating decision.

Exercise caution for Vista today.

Eastport Yacht Club · Thursday, August 27

Vista, an example boat · 21 ft · 12 kt and 2 ft limits

CAUTION

This would be a 5/10 day on the water for Vista. It will be overcast, breezy with winds 2-12 kt, seas under a foot. There is a 21% chance of rain. Watch that wind reaches your 12 kt line.

Tonight and tomorrow

Morning 11a to 12p

CAUTION
Wind
16 kt now · 8 kt, gusts 11 kt
Seas
0.8 ft
Rain
None expected
Storms
In the forecast

Afternoon 1p to 4p

CAUTION
Wind
16 kt now · 10 to 12 kt, gusts 17 kt
Seas
0.9 ft
Rain
None expected
Storms
In the forecast

Evening 5p to 8p

CAUTION
Wind
16 kt now · 9 to 12 kt, gusts 22 kt
Seas
0.8 ft
Rain
None expected
Storms
In the forecast

Overnight 9p to 2a

CAUTION
Wind
16 kt now · 2 to 9 kt, gusts 20 kt
Seas
0.8 ft
Rain
23%
Storms
In the forecast

How close to Vista's limits

Wind16 kt
Over your limityour 12 kt limit
Seas1.3 ft
Inside your limityour 2 ft limit

5/10, wind reaches your 12 kt line

Why

Wind is 16 kt (gusts 18 kt), and that is close to Vista's line. Chance of storms. There is a chance of rain.

On the water now

Wind 16 kt from S, gusting 18 · Seas 1.3 ft · Air 77°F · Water 80°

Cloudy

Annapolis, MD · 1.6 nm away · most recent reading 37 min ago

Annapolis, United States Naval Academy, 1.1 nm away, reported mostly clear, visibility 8.7 nm or better within the hour.

Conditions at a glance

Wind
16 kt now · 2 to 12 kt, gusts 22 ktsustained, vs Vista's 12 kt

Gusts 22 kt, 10 over Vista's line

Seas
0.9 ftvs Vista's 2 ft

Flat, water 80°

Rain
23%vs Vista's 50%

A chance of it

Storms
In the forecast

The forecaster names thunderstorms without an hour, so treat the whole day as open to them

Tide
Low 11:56 am EDT, 0.7 ft · High 5:33 pm, 1.3 ft
Air temp
74° to 88°

Hot through the afternoon

Daylight
6:29 am to 7:44 pm
Warnings
None in force

None issued, which is not the same as no risk

When

The sun sets at 7:44 pm EDT. Plan to be back in Eastport Yacht Club by then.

The hours ahead

Against Vista's own limits.

11a
1p
3p
4p
5p
7p
9p
11p
1a
Wind kt
7
10
11
12
12
11
9
5
3
Seas ft
0.7
0.9
0.9
0.8
0.7
0.8
0.8
0.8
0.6
From
S
SE
SSE
SSE
SSE
SSE
SSE
W
N
11a: 7 knots from the S, 0.7 feet. 12p: 8 knots from the SSE, 0.8 feet. 1p: 10 knots from the SE, 0.9 feet. 2p: 11 knots from the SSE, 0.9 feet. 3p: 11 knots from the SSE, 0.9 feet. 4p: 12 knots from the SSE, 0.8 feet. 5p: 12 knots from the SSE, 0.7 feet. 6p: 12 knots from the SSE, 0.7 feet. 7p: 11 knots from the SSE, 0.8 feet. 8p: 9 knots from the SSE, 0.8 feet. 9p: 9 knots from the SSE, 0.8 feet. 10p: 6 knots from the S, 0.8 feet. 11p: 5 knots from the W, 0.8 feet. 12a: 2 knots from the WNW, 0.7 feet. 1a: 3 knots from the N, 0.6 feet. 2a: 3 knots from the NNE, 0.5 feet
Peaking 12 kt. The shaded band is your best window, drawn.

Four forecast models were read for these hours and their sustained wind splits across Vista's 12 kt limit from 1p to 8p EDT, furthest apart at 6p: 4 kt on the quietest of them and 15 on the windiest. Gusts are not compared. Which of those turns up changes the call, so look again before you take the lines off.

The week ahead

Today
5
12 kt
0.9 ft
Fri
8
10 kt
0.7 ft
Sat
8
9 kt
0.1 ft
Sun
7
11 kt
1.1 ft
Mon
7
11 kt
1.1 ft
Tue
8
10 kt
1.1 ft
Wed
8
9 kt
1.1 ft

Tomorrow is the first of 4 days at 8/10, against today's 5/10. Tuesday's wind read 16 kt in yesterday's forecast. It now reads 10.

Much like yesterday: 12 kt against 11 kt.

Vista's own water

Commercial Traffic

Commercial traffic converges on the Baltimore channel; keep out of the shipping lane.

Naval Academy launches, water taxis and a crowded mooring field share this harbor; on a race afternoon the sailing fleet has right of way and no engine.

Everything funnels through the two ship spans here, commercial traffic included: pick your span early and hold it rather than crossing under a bridge to change your mind.

The tide today

1.7 ftHigh 5 AM0.7 ftLow 11 AM1.3 ftHigh 5 PM

Current

Ebb building to about 0.7 kt by 11:08 am at Greenbury Point, then slack at 2:22 pm, then flood peaking near 0.5 kt at 5:01 pm, then slack at 8:08 pm.

What the pattern is doing

A cold front will approach from the northwest this afternoon and eventually pass to the southeast by early Saturday. High pressure will build north of the area this weekend. There is the potential for some gusty thunderstorms in the afternoon and evening today, and again on Friday, which may necessitate Special Marine Warnings.

Vista's other spots

CAUTION

Bay Bridge Marina

Wind 16 kt (gusts 18 kt)

CAUTION

Harbor Island Marina

Visibility Not available

Scored against Vista's limits

Wind (sustained)
12 kt
Seas
2 ft
Rain
50%
Storms
within 12 hours
In port by
not set
After dark
at the dock by dark

How we got to this call

Wind
16 kt (gusts 18 kt)
Waves
1.3 ft
Visibility
Not available
Lightning
Chance of storms
Precipitation
Rain/showers
This briefing is our analysis of official forecasts and observations, not a guarantee. You know your boat and your crew. The call is yours.
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