Alert archive / Puerto Rico / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 2, NWS JSJ

May 21, 2021

NWS JSJ issued this severe thunderstorm warning at May 21, 2021, 1:14 PM CDT. It was in force for 31 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 21, 2021, 1:14 PM CDT (18:14 UTC)
Expired: May 21, 2021, 1:45 PM CDT
In force: 31 min
Issued by: NWS JSJ
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

The radar

The San Juan radar (TJUA), 37 km from the middle of the area, began a volume at 18:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 21, 1:15 PM CDT	HAIL 1	Corozal, PR	QUARTER SIZED HAIL REPORTED IN BARRIO CUCHILLAS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The text

As transmitted.

947 
WUCA52 TJSJ 211814
SVRSJU
PRC047-101-135-143-145-211845-
/O.NEW.TJSJ.SV.W.0002.210521T1814Z-210521T1845Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service San Juan PR
214 PM AST Fri May 21 2021

The National Weather Service in San Juan has issued a

* Severe Thunderstorm Warning for...
  Vega Baja Municipality in Puerto Rico...
  Morovis Municipality in Puerto Rico...
  Vega Alta Municipality in Puerto Rico...
  Corozal Municipality in Puerto Rico...
  Toa Alta Municipality in Puerto Rico...

* Until 245 PM AST

* At 215 PM AST, a severe thunderstorm was located over Corozal and 
  Morovis, and is nearly stationary.

  HAZARD...50-60 mph wind gusts and penny size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 1848 6632 1845 6632 1843 6630 1838 6630
      1840 6624 1839 6620 1833 6625 1833 6628
      1828 6629 1825 6631 1825 6636 1827 6638
      1829 6638 1826 6641 1826 6646 1833 6645
      1847 6636
TIME...MOT...LOC 1812Z 216DEG 4KT 1833 6638 

HAIL...0.75IN
WIND...60MPH
 
$$

ER

1 follow-up statement

952 
WWCA52 TJSJ 211847
SVSSJU

Severe Weather Statement
National Weather Service San Juan PR
247 PM AST Fri May 21 2021

PRC047-101-135-143-145-211857-
/O.EXP.TJSJ.SV.W.0002.000000T0000Z-210521T1845Z/
Vega Baja PR-Morovis PR-Vega Alta PR-Corozal PR-Toa Alta PR-
247 PM AST Fri May 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR VEGA BAJA...MOROVIS...VEGA
ALTA...COROZAL AND TOA ALTA MUNICIPALITIES HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire.

LAT...LON 1848 6632 1845 6632 1843 6630 1838 6630
      1840 6624 1839 6620 1833 6625 1833 6628
      1828 6629 1825 6631 1825 6636 1827 6638
      1829 6638 1826 6641 1826 6646 1833 6645
      1847 6636
TIME...MOT...LOC 1847Z 216DEG 4KT 1835 6636 

$$

ER

The office that day

Everything else NWS JSJ issued on the same UTC day.

Issued	Product	Office	Lasted
May 21, 12:17 PM CDT	Special Weather Statement	JSJ	28 min
May 21, 12:29 PM CDT	Special Weather Statement	JSJ	16 min
May 21, 12:38 PM CDT	Severe Thunderstorm Warning	JSJ	37 min
May 21, 12:52 PM CDT	Special Weather Statement	JSJ	23 min
May 21, 1:11 PM CDT	Areal Flood Advisory	JSJ	87 min
May 21, 1:46 PM CDT	Special Weather Statement	JSJ	29 min

Nearby

Severe Thunderstorm Warnings in Puerto Rico, 2021 Every severe thunderstorm 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; local storm reports from the same archive; radar from the NEXRAD Level II archive.