National Weather Service United States Department of Commerce

Severe Thunderstorms and Heavy Rain in the Southern Plains; Fire Weather Threat in the Southwest U.S.

Thunderstorms, some severe, may produce heavy to excessive rainfall and isolated flooding over portions of the Southern Plains today and Saturday. Dry conditions, combined with gusty winds and low relative humidities will continue to support an elevated to critical fire weather threat in the Desert Southwest into to early next week. Read More >

TTAA00 KSEW DDHHMM

**  SEW FORECAST GRADIENT TABLE - GFS20 MODEL **
Model cycle = 20230315.  Model time = 12Z.

        UIL-  OTH-  PDX-  OLM-  UIL-  HQM-  AST-  BLI-  UKI-  RDD-  AST-  BLI-
DD/HH   BLI   SEA   BLI   BLI   NUW   SEA   UIL   YZT   UIL   OTH   PDX   YWL
15/15   1.9   2.8   3.6   2.2   1.8   0.9   1.2   0.0  -1.7  -3.5  -0.4   1.0
15/18   1.4   1.6   2.5   1.1   1.0   0.6   0.8   0.3  -4.6  -5.0  -0.3   3.4
15/21   0.9   0.1   0.9  -0.3   0.7   0.5   0.5   0.4  -7.1  -5.6   0.4   3.7
16/00   1.1  -0.6   0.1  -0.4   1.0   0.9   0.2  -0.3  -9.1  -5.5   1.2   2.7
16/03   1.1  -1.8  -0.5   0.1   1.1   0.5  -0.3  -0.8  -8.9  -5.2   1.2  -1.1
16/06   0.4  -3.4  -0.8  -0.1   0.6   0.0  -0.6  -0.5  -8.1  -3.4   0.6  -2.9
16/09   0.0  -4.3  -1.5  -0.4   0.3   0.0  -0.9  -0.7  -8.1  -2.0   0.6  -4.9
16/12  -0.5  -4.8  -2.3  -0.8  -0.1  -0.6  -1.5  -0.4  -7.8  -1.7   0.3  -6.5
16/15  -0.9  -5.1  -2.6  -0.8  -0.7  -0.7  -1.8  -0.4  -6.2  -0.2  -0.1  -7.7
16/18  -1.6  -5.1  -3.4  -1.6  -1.6  -0.5  -1.9  -0.4  -5.8   0.2   0.0  -4.4
17/00  -1.2  -2.6  -4.0  -2.2  -1.3   0.0  -2.4  -1.4  -5.3  -1.4   0.4  -3.3
17/03  -0.6  -2.9  -3.2  -1.4  -0.5  -0.4  -2.1  -0.3  -3.4  -0.4   0.5  -5.2
17/06  -0.7  -3.1  -2.1  -0.6  -0.7  -1.2  -1.9   0.2  -2.1   0.8  -0.5  -5.9
17/09  -1.4  -4.0  -1.9  -0.7  -1.3  -1.9  -1.6   0.3  -1.4   2.2  -1.2  -5.9
17/12  -1.9  -3.4  -1.4  -0.5  -1.8  -1.9  -1.3   1.5  -1.1   1.9  -1.8  -5.6
17/15  -2.2  -2.3  -0.5  -0.5  -1.9  -1.5  -0.6   2.2   0.6   2.3  -2.3  -6.0
17/18  -2.0  -1.3  -0.7  -0.7  -2.1  -1.2  -0.1   2.0   0.4   1.1  -1.4  -3.1
17/21  -2.0  -0.3  -1.4  -1.3  -2.0  -0.3   0.1   2.1  -0.6  -0.5  -0.5  -1.4
18/00  -0.9   0.8  -1.5  -1.5  -0.7   0.2  -0.2   2.2  -0.9  -1.5   0.5  -1.2
18/03  -0.2   0.4  -1.1  -0.7   0.0   0.3  -0.3   1.9  -0.5  -0.9   0.6  -2.9
18/09  -0.4  -0.3  -0.2  -0.2  -0.3  -0.2   0.1   1.8   0.3   0.5  -0.1  -3.6
18/12  -0.5  -0.1  -0.1  -0.2  -0.4   0.0   0.2   2.1  -0.4   0.6  -0.3  -4.0
18/15  -0.6  -0.2   0.2   0.1  -0.5  -0.5   0.3   2.5   0.7   1.4  -0.5  -3.9
18/18  -0.5  -0.3  -0.3  -0.2  -0.5  -0.5  -0.1   2.9   0.3   1.5  -0.4  -1.6
18/21  -0.1   0.1  -0.9  -0.9   0.1   0.4  -0.3   2.8  -0.8   0.5   0.5  -0.4
19/06   0.0   0.8  -0.9  -0.4   0.0   0.2   0.1   2.4   0.4  -0.7   1.0  -2.8
19/12   0.9   0.9   1.0   0.5   1.0   0.9  -0.1   0.4   0.0  -0.7  -0.2  -4.0
19/18   0.1   0.5   1.4   0.9  -0.1  -0.5   0.6   0.3   2.0   0.2  -0.7  -1.4
20/00  -1.2   0.9   0.4   0.1  -1.0  -1.0   0.7   0.4   2.9  -0.2  -1.0   0.9
20/06   0.2   1.1   1.4   0.6   0.6   0.6   1.5  -0.5   3.5   1.1   0.3  -0.7
20/12   0.9  -2.1   1.1   1.4   1.1   0.5   0.4  -0.7  -0.1   1.7   0.3  -2.1
20/18  -0.4  -2.9  -2.2  -0.4  -0.4   0.0  -0.9  -0.5  -3.2   1.8   0.8  -1.6
21/00   0.5  -0.1  -3.4  -1.5   0.4   1.0  -1.9  -2.9   4.0  -3.6   2.0  -3.2
21/06   0.9   5.1  -1.0  -0.8   1.0   1.4  -0.2  -2.8  10.4   4.2   1.7  -5.2
21/12   2.0   4.6   4.1   1.7   2.0   1.1   1.8  -2.4   8.3   3.1  -0.3  -5.2
21/18   1.0   2.7   3.4   1.7   0.5   0.1   2.1  -0.6   3.4   1.7  -0.4  -3.2
22/00   0.6   0.4   1.0   0.4   0.5   0.1   1.3  -0.2  -5.7  -3.3   0.9  -2.4
22/06   0.1  -2.3   0.0   0.1   0.1  -0.4   0.1  -0.6  -6.4  -5.0   0.1  -5.7
22/12   0.0  -2.3  -0.9  -0.1   0.1  -0.4  -0.4  -0.3  -5.1  -3.4   0.5  -7.9
22/18  -0.1  -1.3  -1.9  -0.4  -0.1   0.0  -0.9  -0.4  -1.3  -2.3   0.9  -5.3
23/00   0.5   2.1  -1.9   0.0   0.5   0.8  -0.2  -0.5   1.2  -2.7   2.3  -2.5
23/06   0.6   3.2   1.5   1.0   0.4   0.4   1.3   0.5   3.9  -1.2   0.4  -2.4
23/12   0.3   3.7   3.1   1.5   0.1  -0.2   1.8   1.3   6.3   1.3  -1.0  -1.9
24/00  -0.1   1.7   1.7   0.7  -0.2  -0.2   1.1   2.6   5.3   3.9  -0.7   3.1
24/06  -0.6  -0.8   1.0   0.5  -0.4  -0.6   0.3   0.8   4.8   4.7  -1.3   0.3
24/12  -0.8  -3.9  -0.7  -0.2  -0.3  -1.0  -0.7  -0.3   0.5   4.6  -0.8  -1.5
24/18  -1.0  -3.7  -2.1  -0.6  -1.0  -0.6  -1.0  -0.9  -2.1   2.8   0.1   0.4
25/00  -0.6  -2.2  -3.7  -1.3  -0.7  -0.2  -1.2  -2.2  -5.1  -1.1   1.8   1.4
25/06   0.9  -1.9  -1.7   0.1   0.9   0.0  -1.1  -2.5  -5.3  -1.9   1.4  -0.5
25/12   0.8  -1.2   0.1   0.8   0.9   0.1  -0.1  -1.5  -4.2  -2.6   0.6   0.6

        PDX-  UIL-  CLM-  SEA-  SEA-  OLM-  SEA-  YKM-  SHN-  SHN-  SEA-  SMP-
DD/HH   DLS   CLM   NUW   EAT   YKM   YKM   GEG   GEG   SEA   NUW   SMP   EAT
15/15   1.5   0.9   0.9   3.1   1.6   2.2   3.1   1.4   0.2   1.6   0.4   2.7
15/18   2.3   1.1  -0.1   4.8   3.3   3.3   5.0   1.7  -0.3   0.3   0.8   4.0
15/21   2.2   0.9  -0.1   4.8   3.5   3.1   5.7   2.1  -1.0  -1.0   0.8   4.0
16/00   1.5   0.8   0.2   4.0   3.2   3.0   5.1   1.9  -0.6  -0.8   0.2   3.8
16/03   0.4   0.3   0.8   2.1   2.2   2.2   2.6   0.4   0.0   0.1  -0.9   3.0
16/06  -0.5  -0.1   0.7   0.4   0.8   0.8   1.4   0.6   0.0   0.1  -1.6   2.0
16/09  -1.4  -0.2   0.5  -1.0  -0.1  -0.2  -0.5  -0.4   0.1   0.1  -1.8   0.9
16/12  -2.1  -0.7   0.6  -1.8  -0.7  -0.9  -2.2  -1.5  -0.1  -0.3  -1.9   0.1
16/15  -3.1  -1.2   0.5  -2.7  -1.7  -1.9  -3.4  -1.7   0.0  -0.4  -2.0  -0.7
16/18  -3.1  -1.5  -0.1  -2.7  -2.0  -2.4  -3.1  -1.1  -0.2  -1.4  -0.5  -2.2
17/00  -3.3  -1.5   0.2  -3.6  -2.7  -2.7  -4.1  -1.4   0.6  -1.7  -1.5  -2.1
17/03  -3.8  -0.8   0.3  -4.0  -2.5  -2.9  -4.5  -2.0  -0.2  -1.1  -2.5  -1.5
17/06  -4.4  -1.0   0.4  -4.8  -3.0  -3.3  -5.1  -2.1   0.0  -0.4  -3.4  -1.4
17/09  -3.9  -1.6   0.3  -4.7  -3.0  -3.4  -5.5  -2.5  -0.4  -0.5  -3.2  -1.5
17/12  -3.6  -1.9   0.1  -4.5  -3.0  -3.2  -5.5  -2.5  -0.1  -0.4  -3.0  -1.5
17/15  -3.4  -2.0   0.0  -5.2  -3.9  -3.9  -5.7  -1.8   0.2   0.0  -3.2  -1.9
17/18  -2.7  -1.6  -0.5  -4.1  -3.4  -3.5  -4.3  -0.9  -0.1  -0.8  -1.3  -2.8
17/21  -1.9  -1.6  -0.4  -3.6  -3.1  -3.0  -3.7  -0.6   0.4  -1.1  -1.5  -2.1
18/00  -1.9  -0.7   0.0  -3.5  -2.7  -2.8  -3.5  -0.7   0.3  -0.9  -1.7  -1.8
18/03  -2.3  -0.3   0.3  -3.9  -2.8  -2.8  -4.5  -1.7   0.1  -0.5  -2.6  -1.3
18/09  -2.1  -0.5   0.2  -3.3  -2.1  -2.2  -4.3  -2.2  -0.1   0.0  -2.4  -0.9
18/12  -1.9  -0.6   0.3  -3.6  -2.4  -2.3  -4.7  -2.3   0.2   0.1  -2.6  -1.0
18/15  -1.9  -0.6   0.1  -3.4  -2.2  -2.2  -4.2  -2.0   0.0   0.2  -2.0  -1.4
18/18  -1.6  -0.2  -0.3  -2.7  -1.9  -1.9  -3.0  -1.1   0.1   0.0  -0.8  -1.9
18/21  -0.9   0.2  -0.1  -2.2  -1.7  -1.7  -2.4  -0.7   0.1  -0.5  -0.5  -1.8
19/06  -2.1  -0.3   0.3  -2.2  -1.6  -1.8  -3.0  -1.4   0.0  -0.1  -2.3   0.1
19/12  -0.3   0.5   0.5  -2.6  -1.6  -1.2  -3.7  -2.1   0.5   0.7  -1.9  -0.6
19/18   0.2  -0.2   0.1   0.5   0.5   0.4   0.3  -0.1  -0.2   0.6   0.5   0.1
20/00   0.0  -0.8  -0.2   0.8   0.6   0.4   2.6   2.0  -0.5   0.0   0.3   0.5
20/06  -0.1   0.2   0.4   0.3   0.2   0.1   0.2   0.0  -0.4   0.6  -0.5   0.8
20/12  -0.6   0.5   0.6  -0.4   0.0   0.3  -0.9  -0.9   0.2   1.5  -0.2  -0.2
20/18  -1.0  -0.3  -0.1  -0.8  -0.4  -0.3  -2.5  -2.1   0.1  -0.3   0.5  -1.3
21/00  -0.2  -0.1   0.5  -1.7   0.2   0.2  -2.8  -3.0   0.4  -1.3  -0.1  -1.6
21/06   2.0   0.3   0.7  -0.4   1.7   2.0   0.3  -1.4   0.5  -0.6   0.0  -0.5
21/12   3.6   1.0   1.0   2.9   3.1   3.5   4.7   1.6  -0.4   0.9   1.2   1.7
21/18   2.9   0.6  -0.1   4.9   4.1   4.3   5.5   1.4  -0.6   0.4   0.6   4.3
22/00   1.8   0.8  -0.3   3.4   2.7   2.5   2.0  -0.7  -0.8  -0.3   0.2   3.2
22/06   0.0   0.1   0.0   1.0   1.0   0.7  -1.6  -2.5  -0.3   0.1  -0.2   1.2
22/12  -0.8  -0.2   0.3  -0.9  -0.1  -0.4  -1.7  -1.6  -0.2   0.2  -0.9   0.0
22/18   0.0  -0.2   0.1  -0.1   0.9   0.8   1.4   0.5   0.1  -0.2   0.9  -1.0
23/00   0.9   0.1   0.4   2.8   3.1   3.4   4.2   1.1   0.2  -0.1   1.2   1.6
23/06   2.2   0.2   0.2   3.2   3.3   3.5   3.9   0.6   0.0   0.6   0.0   3.2
23/12   2.4  -0.1   0.3   3.2   2.8   3.1   3.6   0.8  -0.2   0.8  -0.3   3.5
24/00   1.8   0.0  -0.2   4.9   4.3   4.3   4.3   0.0  -0.7  -0.1   0.5   4.4
24/06   0.2  -0.4   0.0   2.8   2.2   2.2   2.4   0.2  -0.2   0.5  -0.2   3.0
24/12  -0.7  -0.4   0.1   1.2   1.3   1.0   0.5  -0.8  -0.3   0.1  -0.5   1.7
24/18  -0.4  -0.8  -0.1   1.1   1.2   1.1   0.8  -0.4   0.0  -0.5   0.7   0.4
25/00   0.6  -0.7   0.1   2.4   2.7   2.2   2.2  -0.4  -0.2  -1.2   0.8   1.6
25/06   0.2   0.2   0.6   1.7   2.0   2.1   1.3  -0.8   0.1   0.0  -0.2   1.9
25/12   0.8   0.5   0.4   1.9   2.1   2.2   1.5  -0.6   0.0   0.7  -0.3   2.2