Alert archive / California / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 29, NWS Hanford, CA
NWS Hanford, CA issued this severe thunderstorm warning at Sep 11, 2017, 7:40 PM PDT for 4 counties in California. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 11, 2017, 7:40 PM PDT (02:40 UTC)
- Expired
- Sep 11, 2017, 8:30 PM PDT
- In force
- 50 min
- Issued by
- NWS Hanford, CA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Fresno County, CA, Madera County, CA, Mariposa County, CA, Merced County, CA
The radar
The San Joaquin Valley radar (KHNX), 103 km from the middle of the area, began a volume at 02:44 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.
The nearest sounding before it
Reno, NV (KREV), launched 00:00Z, 2.7 hours before the alert went out and 308 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 13 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 3189 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Hanford, CA wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 11, 4:45 PM PDT, 2 hours 55 minutes earlier.
Area forecast discussion, Sep 11, 4:45 PM PDT, 2 hours 55 minutes before
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Special weather statement, Sep 11, 2:53 PM PDT, 4 hours 47 minutes before
Special Weather Statement National Weather Service San Joaquin Valley CA 253 PM PDT MON SEP 11 2017 CAZ095-099-112245- Kern County Mountains CA-Southeastern Kern County Desert CA- 253 PM PDT MON SEP 11 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN KERN COUNTY UNTIL 345 PM PDT... At 252 PM PDT, Doppler radar was tracking a strong thunderstorm 10 miles east of Tehachapi, or 32 miles north of Lancaster, moving north at 15 mph. Winds in excess of 30 mph and brief heavy rain will be possible with this storm. Locations impacted include... Tehachapi, Golden Hills and Mojave. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && LAT...LON 3499 11824 3517 11850 3532 11827 3512 11806 TIME...MOT...LOC 2152Z 160DEG 13KT 3516 11826 BSO
Special weather statement, Sep 11, 3:06 PM PDT, 4 hours 34 minutes before
Special Weather Statement National Weather Service San Joaquin Valley CA 306 PM PDT MON SEP 11 2017 CAZ090-093-112245- Mariposa, Madera, and Fresno County Foothills CA-East- Central San Joaquin Valley CA- 306 PM PDT MON SEP 11 2017 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL FRESNO COUNTY UNTIL 345 PM PDT... At 306 PM PDT, Doppler radar was tracking a strong thunderstorm 12 miles northeast of Sanger, or 16 miles east of Clovis, moving northwest at 35 mph. Winds in excess of 30 mph and brief heavy rainfall will be possible with this storm. Locations impacted include... Fancher Creek. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 3676 11926 3670 11942 3692 11961 3703 11944 TIME...MOT...LOC 2206Z 152DEG 29KT 3683 11940 BSO
Special weather statement, Sep 11, 4:13 PM PDT, 3 hours 27 minutes before
Special Weather Statement
National Weather Service San Joaquin Valley CA
413 PM PDT MON SEP 11 2017
CAZ095-098-120000-
Kern County Mountains CA-Indian Wells Valley CA-
413 PM PDT MON SEP 11 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN KERN COUNTY UNTIL
500 PM PDT...
At 413 PM PDT, Doppler radar was tracking a strong thunderstorm near
China Lake Acres, or near Ridgecrest, moving north at 30 mph.
Winds in excess of 30 mph will be possible with this storm.
Locations impacted include...
Ridgecrest, Inyokern and China Lake Acres.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3557 11777 3579 11795 3580 11792 3579 11764
3571 11764 3571 11766 3569 11766 3568 11763
3558 11764
TIME...MOT...LOC 2313Z 161DEG 25KT 3569 11773
BSOSpecial weather statement, Sep 11, 4:27 PM PDT, 3 hours 13 minutes before
Special Weather Statement National Weather Service San Joaquin Valley CA 427 PM PDT MON SEP 11 2017 CAZ099-120000- Southeastern Kern County Desert CA- 427 PM PDT MON SEP 11 2017 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL KERN COUNTY UNTIL 500 PM PDT... At 427 PM PDT, Doppler radar was tracking a strong thunderstorm over Government Peak, moving north at 25 mph. Half inch hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Government Peak and Randsburg. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && LAT...LON 3524 11763 3520 11774 3539 11786 3544 11764 TIME...MOT...LOC 2327Z 160DEG 20KT 3531 11768 BsO
Special weather statement, Sep 11, 4:38 PM PDT, 3 hours 2 minutes before
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Everything else NWS Hanford, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 5:12 PM PDT | Severe Thunderstorm Warning | HNX | Kern, Tulare | 33 min |
| Sep 11, 5:16 PM PDT | Severe Thunderstorm Warning | HNX | Kings, Tulare | 29 min |
| Sep 11, 5:37 PM PDT | Severe Thunderstorm Warning | HNX | Fresno, Kings | 38 min |
| Sep 11, 5:37 PM PDT | Severe Thunderstorm Warning | HNX | Tulare | 23 min |
| Sep 11, 6:14 PM PDT | Severe Thunderstorm Warning | HNX | Fresno, Kings, Madera | 46 min |
| Sep 11, 6:19 PM PDT | Special Weather Statement | HNX | Tulare | 41 min |
| Sep 11, 6:21 PM PDT | Special Weather Statement | HNX | Tulare | 39 min |
| Sep 11, 6:30 PM PDT | Special Weather Statement | HNX | 30 min | |
| Sep 11, 6:42 PM PDT | Severe Thunderstorm Warning | HNX | Fresno, Madera, Mariposa, Merced | 48 min |
| Sep 11, 6:55 PM PDT | Special Weather Statement | HNX | Fresno | 35 min |
| Sep 11, 7:30 PM PDT | Special Weather Statement | HNX | Fresno, Madera | 45 min |
| Sep 11, 7:50 PM PDT | Special Weather Statement | HNX | Mariposa | 40 min |
| Sep 11, 8:07 PM PDT | Special Weather Statement | HNX | Madera | 38 min |
| Sep 11, 8:25 PM PDT | Special Weather Statement | HNX | Fresno, Madera | 50 min |
| Sep 11, 9:02 PM PDT | Special Weather Statement | HNX | Mariposa | 43 min |
Nearby
Severe Thunderstorm Warnings in California, 2017Every severe thunderstorm warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.