Alert archive / Puerto Rico / Red Flag Warnings in 2021

Red Flag Warning 6, NWS JSJ

April 1, 2021

NWS JSJ issued this red flag warning at Apr 1, 2021, 12:24 PM CDT. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 1, 2021, 12:24 PM CDT (17:24 UTC)
Expired
Apr 1, 2021, 5:00 PM CDT
In force
5 hr
Issued by
NWS JSJ

The text

As transmitted.

708 
WWCA82 TJSJ 011724
RFWSJU

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Juan PR
124 PM AST Thu Apr 1 2021

...RED FLAG WARNING IN EFFECT UNTIL 6 PM AST THIS EVENING FOR THE
SOUTHERN COASTAL PLAINS...

PRZ014-027-012200-
/O.NEW.TJSJ.FW.W.0006.210401T1724Z-210401T2200Z/
South Central Coastal Plains-
Southwest Coastal Plains and Mona Island-
124 PM AST Thu Apr 1 2021

...RED FLAG WARNING IN EFFECT UNTIL 6 PM AST THIS EVENING FOR 
FIRE WEATHER ZONES 014 AND 027...

The National Weather Service in San Juan has issued a Red Flag
Warning, which is in effect until 6 PM AST this evening. 

* AFFECTED AREA...Fire weather zones 014 and 027.

* WIND...17-20 mph frequent gusts between 25 to 30 mph.  
 
* HUMIDITY...RH values ranging between 35-50%
 
* THUNDERSTORMS...None.

* KBDI...Already at or exceeding critical threshold in some 
  areas.
 
* IMPACTS...any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now....or will shortly. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$
1 follow-up statement
874 
WWCA82 TJSJ 012158
RFWSJU

URGENT - FIRE WEATHER MESSAGE
National Weather Service San Juan PR
558 PM AST Thu Apr 1 2021

...Red Flag Warning will expire at 6 PM...

PRZ014-027-012300-
/O.EXP.TJSJ.FW.W.0006.000000T0000Z-210401T2200Z/
South Central Coastal Plains-
Southwest Coastal Plains and Mona Island-
558 PM AST Thu Apr 1 2021

...RED FLAG WARNING WILL EXPIRE AT 6 PM AST THIS EVENING FOR FIRE
WEATHER ZONES 014 AND 027...

Winds and relative humidities are currently above critical fire
weather levels. Therefore, the Red Flag Warning for the southern
coastal plains was allowed to expire.

$$

Nearby

Red Flag Warnings in Puerto Rico, 2021Every red flag warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.