Regional Outbreaks of Severe Weather Through Early Next Week; Early Season Heat Wave across the South

Active spring pattern across the center of our nation with several episodes of severe weather and heavy rainfall expected into next week. The potential for very large hail, long track tornadoes, severe wind gusts, frequent cloud to ground lightning strikes and flash flooding are in the outlook. Furthermore, dangerous early season heat wave continues for the Gulf Coast states into early next week. Read More >

Table C5

Reference Time designator A2

(when T1 = Q, X, or Y)

Instructions for the proper application of the reference time designator

1. The designator specified in this table should be used to the greatest extent possible to indicate the reference time of data contained within the text of the bulletin.

2. When the table does not contain a suitable designator for the reference time, an alphabetic designator which is not assigned in the table should be introduced and the WMO secretariat notified.

Designator	Data Type	Designator	Data Type
A	Analysis (00 hour)	N	39 hours forecast
B	3 hours forecast	O	42 hours forecast
C	6 hours forecast	P	45 hours forecast
D	9 hours forecasts	Q	48 hours forecast
E	12 hours forecast	R	54 hours forecast [48+6]
F	15 hours forecast	S	66 hours forecast [+12]
G	18 hours forecast	T	78 hours forecast
H	21 hours forecast	U	90 hours forecast
I	24 hours forecast	V	102 days forecast
J	27 hours forecast	W	114 days forecast
K	30 hours forecast	X	126 days forecast
L	33 hours forecast	Y	138 days forecast
M	36 hours forecast	Z	150 days forecast