Alert archive / Mississippi / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 407, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Jun 17, 2023, 6:25 PM CDT for Adams County, Mississippi; Concordia Parish, Louisiana. 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
- Jun 17, 2023, 6:25 PM CDT (23:25 UTC)
- Expired
- Jun 17, 2023, 7:15 PM CDT
- In force
- 50 min
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Concordia Parish, LA, Adams County, MS
The radar
The Ft Polk radar (KPOE), 145 km from the middle of the area, began a volume at 23:26 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 17, 12:55 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 11.4 hours before the alert went out and 164 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
- 2534 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 696 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.2
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 Jackson, MS wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 17, 3:31 PM CDT, 2 hours 54 minutes earlier.
Area forecast discussion, Jun 17, 3:31 PM CDT, 2 hours 54 minutes before
Area Forecast Discussion
National Weather Service Jackson MS
331 PM CDT Sat Jun 17 2023
...New DISCUSSION...
.MESOSCALE UPDATE...
Issued at 120 PM CDT Sat Jun 17 2023
VFR conditions are prevailing this afternoon and some scattered
thunderstorms have developed south of a stalled frontal boundary
and could carry the threat for stronger winds and hail. A strong
line of storms is forecast to impact the area tomorrow morning and
with this line, damaging winds are likely. IFR and even LIFR
conditions due to low ceilings are also possible in the wake of
the line and scattered thunderstorms will likely linger through
the remainder of the period.
&&
.DISCUSSION...
Issued at 330 PM CDT Sat Jun 17 2023
Overview...
An unsettled pattern persists and we will likely see much of the
same activity we have observed the past few days as an upper ridge
over Texas is helping to steer embedded disturbances towards our
area. This will support multiple rounds of storms daily and should
continue through at least the remainder of the short term period.
Additionally, a stalled frontal boundary is serving as a secondary
focus for storms along and south of I-20 where there exists greater
instability and strong return flow. The unsettled weather should
begin to diminish by Monday as an upper low will turn flow northerly
and drier air wraps around the backside. Models are in good
agreement that a rex block forms next week and should keep the upper
low around.
Tonight and tomorrow...
Severe thunderstorms are ongoing south of I-20 along a stalled
frontal boundary, aided by strong instability (5000+ j/kg as
depicted by mesoanalysis) and strong deep layer shear of around 50
kts. These storms are capable of damaging wind gusts and large hail
and will likely continue over the next several hours as they push
southeastward along the boundary. These storms should taper off
after sunset with diminishing diurnal heating.
The main concern in the short term will be the potential for two
MCSs that will sweep across the area overnight and into early
tomorrow morning. There is some uncertainty amongst CAMs regarding
exact positioning of these MCSs however, general agreement on very
strong convective parameters with vertical totals 29-31, midlevel
lapse rates 7-8 c/km, SBCAPE 3000+j/kg, and deep layer shear 50-60
kts. Given this, widespread impacts are likely and could
exacerbate current issues with power outages. This is especially
concerning amidst heat indices of 105-110, these are likely to
continue over the next several days.
Sunday night through next weekend...
Much of the same convective parameters will persist into the Sunday
night time frame with yet another round of severe storms possible
along a similar NW/SE corridor. These storms will likely have
similar potential for damaging winds and large hail given convective
parameters and persistent deep layer shear.
Looking ahead to early next week, the pattern finally shows signs of
letting up as an upper low pressure system makes its way across the
upper midwest and Tennessee. This places us on the dry side of the
low with dry air wrapping around the backside. Given climatology for
this time of year, it will be difficult to maintain any sort of dry
airmass, however this should be a reprieve from the current
unsettled pattern and will likely decrease rain and storm
chances. Additionally, deep layer shear should weaken amidst more
stagnant flow aloft and should return to more seasonal norms./SAS/
&&
.AVIATION...
(12Z TAFS)
Issued at 640 AM CDT Sat Jun 17 2023
A mix of VFR to IFR flight categories are being observed at area
TAF sites this morning due to patchy low ceilings and/or fog. Both
will quickly begin to erode after sunrise, with a return to VFR
categories forecast areawide for much of the day. Scattered
convection is possible this afternoon, particularly across East
and Southeast Mississippi. This could briefly result in categories
falling to MVFR/IFR categories where observed. Another complex of
potentially severe storms is currently forecast to impact the
area late tonight into early Sunday morning, generally between the
07- 12Z. Damaging wind gusts of 61 knots and quarter to golf ball
size hail will be possible, and a brief tornado cannot be ruled
out as well. Nearly continuous lightning strikes and heavy
downpours are likely as well. Winds today will vary from the west
and north between 5-8 knots. /19/
&&
.PRELIMINARY POINT TEMPS/POPS...
Jackson 72 91 70 90 / 80 70 70 50
Meridian 70 88 70 90 / 30 80 80 70
Vicksburg 73 92 71 91 / 70 60 70 20
Hattiesburg 72 92 74 94 / 20 60 40 70
Natchez 73 94 73 93 / 40 50 40 30
Greenville 70 87 70 88 / 80 70 70 20
Greenwood 70 88 70 88 / 80 70 70 30
&&
.JAN WATCHES/WARNINGS/ADVISORIES...
MS...Heat Advisory until 8 PM CDT this evening for MSZ040>043-047>050-
053>056-059>066-072>074.
LA...Heat Advisory until 8 PM CDT this evening for LAZ007>009-015-016-
023>026.
AR...None.
&&
SAS20/SAS20/SAS20Hazardous weather outlook, Jun 17, 6:09 PM CDT, 16 minutes before
Hazardous Weather Outlook National Weather Service Jackson MS 609 PM CDT Sat Jun 17 2023 ARZ074-075-LAZ007>009-015-016-MSZ018-019-025>028-034>037-040>044- 047>049-182315- Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Bolivar-Sunflower-Leflore-Grenada-Carroll-Montgomery- Washington-Humphreys-Holmes-Attala-Issaquena-Sharkey-Yazoo- Madison MS-Leake-Warren-Hinds-Rankin- 609 PM CDT Sat Jun 17 2023 This hazardous weather outlook is for portions of southeast Arkansas, northeast Louisiana, central Mississippi, north central Mississippi, northwest Mississippi, and west central Mississippi. .DAY ONE...Tonight and Sunday SEVERE THUNDERSTORMS THREAT...Enhanced TIMING...Tonight through Sunday FLOODING THREAT...Limited TIMING...Sunday Tonight, severe thunderstorms are likely. Some thunderstorms may produce damaging winds up to 70 mph and large hail up to golf ball size. A few tornadoes cannot be ruled out. (https://www.weather.gov/images/jan/graphicast/2.png) Sunday, flash flooding is possible Sunday into Sunday night, particularly in low lying and urban areas. (https://www.weather.gov/images/jan/graphicast/4.png) .DAYS TWO THROUGH SEVEN...Sunday night through Friday Isolated severe thunderstorms capable of damaging wind gusts and hail up to quarter size are possible for portions of the outlook area Monday into Monday evening. (https://www.weather.gov/images/jan/graphicast/5.png) Dangerous heat with maximum heat index values of 105 to 110 degrees is expected for portions of northeast Louisiana, southwest and south central Mississippi Sunday and Monday afternoons. (https://www.weather.gov/images/jan/graphicast/6.png) .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations may be needed for portions of the region tonight through Monday night. MSZ029-032-038-045-046-050>052-056>058-182315- Webster-Choctaw-Winston-Neshoba-Kemper-Scott-Newton-Lauderdale- Smith-Jasper-Clarke- 609 PM CDT Sat Jun 17 2023 This hazardous weather outlook is for portions of central Mississippi, east central Mississippi, and north central Mississippi. .DAY ONE...Tonight and Sunday SEVERE THUNDERSTORMS THREAT...Enhanced TIMING...Mainly Sunday FLOODING THREAT...Limited TIMING...Sunday Mainly Sunday, severe thunderstorms are likely. Some thunderstorms may produce damaging winds up to 70 mph and large hail golf ball size up to two inches. A few tornadoes cannot be ruled out. (https://www.weather.gov/images/jan/graphicast/2.png) Sunday, flash flooding is possible Sunday into Sunday night, particularly in low lying and urban areas. (https://www.weather.gov/images/jan/graphicast/4.png) .DAYS TWO THROUGH SEVEN...Sunday night through Friday Isolated severe thunderstorms capable of damaging wind gusts and hail up to quarter size are possible for portions of the outlook area Monday into Monday evening. (https://www.weather.gov/images/jan/graphicast/5.png) Dangerous heat with maximum heat index values of 105 to 110 degrees is expected for portions of northeast Louisiana, southwest and south central Mississippi Sunday and Monday. (https://www.weather.gov/images/jan/graphicast/6.png) .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations may be needed for portions of the region tonight through Monday night. MSZ030-031-033-039-182315- Clay-Lowndes-Oktibbeha-Noxubee- 609 PM CDT Sat Jun 17 2023 This hazardous weather outlook is for portions of east central Mississippi, and northeast Mississippi. .DAY ONE...Tonight and Sunday SEVERE THUNDERSTORMS THREAT...Slight TIMING...Tonight through Sunday FLOODING THREAT...Limited TIMING...Sunday Tonight through sunday, severe thunderstorms are possible. Some thunderstorms could produce damaging winds to 70 mph and hail of golf ball size to up to two inches. (https://www.weather.gov/images/jan/graphicast/1.png) Sunday, flash flooding is possible Sunday into Sunday night, particularly in low lying and urban areas. (https://www.weather.gov/images/jan/graphicast/4.png) .DAYS TWO THROUGH SEVEN...Sunday night through Friday Isolated severe thunderstorms capable of damaging wind gusts and hail up to quarter size are possible for portions of the outlook area Monday into Monday evening. (https://www.weather.gov/images/jan/graphicast/5.png) Dangerous heat with maximum heat index values of 105 to 110 degrees is expected for portions of northeast Louisiana, southwest and south central Mississippi Sunday and Monday. (https://www.weather.gov/images/jan/graphicast/6.png) .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations may be needed for portions of the region tonight through Monday night. LAZ023-025-182315- Franklin LA-Tensas- 609 PM CDT Sat Jun 17 2023 This hazardous weather outlook is for portions of northeast Louisiana. .DAY ONE...Tonight and Sunday SEVERE THUNDERSTORMS THREAT...Enhanced TIMING...Tonight through Sunday FLOODING THREAT...Limited TIMING...Sunday DANGEROUS HEAT THREAT...Limited TIMING...Sunday Tonight through sunday, severe thunderstorms are likely. Some thunderstorms may produce damaging winds up to 70 mph and large hail up to golf ball size. A few tornadoes cannot be ruled out. (https://www.weather.gov/images/jan/graphicast/2.png) Sunday, flash flooding is possible Sunday into Sunday night, particularly in low lying and urban areas. (https://www.weather.gov/images/jan/graphicast/4.png) Sunday, caution is advised for possible dangerous heat as heat index values peak near 105 degrees. Heat exhaustion will be possible with outdoor activity. (https://www.weather.gov/images/jan/graphicast/6.png) .DAYS TWO THROUGH SEVEN...Sunday night through Friday Isolated severe thunderstorms capable of damaging wind gusts and hail up to quarter size are possible for portions of the outlook area Monday into Monday evening. (https://www.weather.gov/images/jan/graphicast/5.png) Dangerous heat with maximum heat index values of 105 to 110 degrees is expected for portions of northeast Louisiana, southwest and south central Mississippi Sunday and Monday. (https://www.weather.gov/images/jan/graphicast/6.png) .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations may be needed for portions of the region tonight through Monday night. MSZ053>055-059-061>066-072>074-182315- Claiborne-Copiah-Simpson-Jefferson-Franklin MS-Lincoln-Lawrence- Jefferson Davis-Covington-Jones-Marion-Lamar-Forrest- 609 PM CDT Sat Jun 17 2023 This hazardous weather outlook is for portions of central Mississippi, and south central Mississippi. .DAY ONE...Tonight and Sunday SEVERE THUNDERSTORMS THREAT...Enhanced TIMING...Mainly Sunday FLOODING THREAT...Limited TIMING...Sunday DANGEROUS HEAT THREAT...Limited TIMING...Sunday Mainly sunday, severe thunderstorms are likely. Some thunderstorms may produce damaging winds up to 70 mph and large hail up to golf ball size. A few tornadoes cannot be ruled out. (https://www.weather.gov/images/jan/graphicast/2.png) Sunday, flash flooding is possible Sunday into Sunday night, particularly in low lying and urban areas. (https://www.weather.gov/images/jan/graphicast/4.png) Sunday, caution is advised for possible dangerous heat as heat index values peak near 105 degrees. Heat exhaustion will be possible with outdoor activity. (https://www.weather.gov/images/jan/graphicast/6.png) .DAYS TWO THROUGH SEVEN...Sunday night through Friday Isolated severe thunderstorms capable of damaging wind gusts and hail up to quarter size are possible for portions of the outlook area Monday into Monday evening. (https://www.weather.gov/images/jan/graphicast/5.png) Dangerous heat with maximum heat index values of 105 to 110 degrees is expected for portions of northeast Louisiana, southwest and south central Mississippi Sunday and Monday. (https://www.weather.gov/images/jan/graphicast/6.png) .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations may be needed for portions of the region tonight through Monday night. LAZ024-026-MSZ060-182315- Catahoula-Concordia-Adams- 609 PM CDT Sat Jun 17 2023 This hazardous weather outlook is for portions of northeast Louisiana, and southwest Mississippi. .DAY ONE...Tonight and Sunday SEVERE THUNDERSTORMS THREAT...Enhanced TIMING...Mainly Sunday FLOODING THREAT...Limited TIMING...Sunday DANGEROUS HEAT THREAT...Elevated TIMING...Sunday Mainly sunday, severe thunderstorms are likely. Some thunderstorms may produce damaging winds up to 70 mph and large hail up to golf ball size. A few tornadoes cannot be ruled out. (https://www.weather.gov/images/jan/graphicast/2.png) Sunday, flash flooding is possible Sunday into Sunday night, particularly in low lying and urban areas. (https://www.weather.gov/images/jan/graphicast/4.png) Sunday, dangerous heat likely with peak heat index values ranging from 106 to 110 degrees. Heat exhaustion will be likely with outdoor activity. (https://www.weather.gov/images/jan/graphicast/5.png) .DAYS TWO THROUGH SEVEN...Sunday night through Friday Isolated severe thunderstorms capable of damaging wind gusts and hail up to quarter size are possible for portions of the outlook area Monday into Monday evening. (https://www.weather.gov/images/jan/graphicast/5.png) Dangerous heat with maximum heat index values of 105 to 110 degrees is expected for portions of northeast Louisiana, southwest and south central Mississippi Sunday and Monday. (https://www.weather.gov/images/jan/graphicast/6.png) .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations may be needed for portions of the region tonight through Monday night. 0 && ...HAZARD LEGEND... *SEVERE THUNDERSTORMS* High...Significant severe thunderstorms and tornadoes are likely with strong or violent tornadoes possible. Moderate...Significant severe thunderstorms and tornadoes are likely with strong tornadoes possible. Enhanced...Severe thunderstorms are likely and tornadoes are possible. Slight...Severe thunderstorms and tornadoes are possible. Marginal...Isolated severe thunderstorms are possible. *FLOODING* Extreme...Widespread and significant flooding is likely. Significant...Widespread flash flooding is likely and significant flooding is possible. Elevated...Areas of flash flooding likely. Limited...Localized flash flooding is possible. *DANGEROUS HEAT* Extreme...Extreme heat is expected with peak heat index values in excess of 110 degrees for multiple days. Heat stroke continues to be a major concern. Significant...Dangerous heat expected with peak heat index values in excess of 110 degrees. Heat stroke will be a significant concern. Elevated...Dangerous heat likely with peak heat index values ranging from 106 to 110 degrees. Heat exhaustion will be likely. Limited...Caution is advised for possible dangerous heat as heat index values peak near 105 degrees. Heat exhaustion will be possible. ...USEFUL WEATHER WEB PAGES (URLS)... NWS JAN Home page... https://www.weather.gov/jan Stay Aware, Stay Safe NWS JAN Briefing Page... https://www.weather.gov/jan/safe Latest Weather Briefing... https://www.weather.gov/jan/weather_briefing Tropical page... https://www.weather.gov/srh/tropical?office=jan National Hurricane Center Home Page... https://www.nhc.noaa.gov/ Find NWS JAN on Facebook... https://www.facebook.com/NWSJacksonMS Follow NWS JAN on Twitter... @NWSJacksonMS Follow NWS JAN on Youtube... https://www.youtube.com/user/NWSJacksonMiss ...ADDITIONAL URLS FOR SEVERE WEATHER ISSUES... Storm Prediction Center (SPC)... https://www.spc.noaa.gov/ Meso Analysis... https://www.spc.noaa.gov/exper/mesoanalysis/ Day 1 through 3 Outlooks... https://www.spc.noaa.gov/products/outlook/ Storm Reports... https://www.spc.noaa.gov/climo/online/ ...ADDITIONAL URLS FOR FLOODING ISSUES... Current Watches and Warnings... https://www.weather.gov/jan/safe_HeavyRain Observed Precipitation Images... https://www.weather.gov/jan/precipmaps River Forecast Center... https://www.weather.gov/lmrfc/ Significant River Flood Outlook... https://www.wpc.ncep.noaa.gov/nationalfloodoutlook/index.html Day 1 through 3 Excessive Rainfall... https://www.wpc.ncep.noaa.gov/qpf/excess_rain.shtml Excessive Rainfall Discussion... https://www.wpc.ncep.noaa.gov/discussions/qpferd.html Day 1 through 7 QPF... https://www.wpc.ncep.noaa.gov/qpf/qpf2.shtml QPF Discussion... https://www.wpc.ncep.noaa.gov/discussions/qpfpfd.html
In the hours before
Local storm report, Jun 17, 4:29 PM CDT, 1 hour 56 minutes before
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</html>The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 7:10 PM CDT | Special Weather Statement | JAN | Kemper | 35 min |
| Jun 16, 7:26 PM CDT | Severe Thunderstorm Warning | JAN | Bolivar | 64 min |
| Jun 16, 7:31 PM CDT | Severe Thunderstorm Warning | JAN | Kemper, Noxubee | 38 min |
| Jun 16, 8:02 PM CDT | Severe Thunderstorm Warning | JAN | Leflore, Sunflower | 58 min |
| Jun 16, 8:05 PM CDT | Severe Thunderstorm Warning | JAN | Holmes, Humphreys, Yazoo | 70 min |
| Jun 16, 8:23 PM CDT | Severe Thunderstorm Warning | JAN | Lauderdale, Newton | 50 min |
| Jun 16, 8:56 PM CDT | Severe Thunderstorm Warning | JAN | Holmes, Humphreys, Leflore | 42 min |
| Jun 16, 8:59 PM CDT | Special Weather Statement | JAN | Clarke, Jasper | 46 min |
| Jun 16, 9:06 PM CDT | Severe Thunderstorm Warning | JAN | Madison, Yazoo | 39 min |
| Jun 16, 9:24 PM CDT | Severe Thunderstorm Warning | JAN | Clarke, Jasper | 66 min |
| Jun 16, 9:32 PM CDT | Severe Thunderstorm Warning | JAN | Attala, Holmes, Madison, Yazoo | 43 min |
| Jun 16, 9:37 PM CDT | Severe Thunderstorm Warning | JAN | Rankin | 68 min |
| Jun 16, 10:00 PM CDT | Special Weather Statement | JAN | Madison | 30 min |
| Jun 16, 10:12 PM CDT | Severe Thunderstorm Warning | JAN | Covington, Jefferson Davis, Lawrence, Rankin, Simpson, Smith | 63 min |
| Jun 16, 10:24 PM CDT | Special Weather Statement | JAN | Jones | 51 min |
| Jun 16, 11:01 PM CDT | Severe Thunderstorm Warning | JAN | Covington, Jefferson Davis | 59 min |
| Jun 16, 11:18 PM CDT | Severe Thunderstorm Warning | JAN | Forrest, Lamar, Marion | 87 min |
| Jun 17, 12:47 AM CDT | Special Weather Statement | JAN | Lamar | 28 min |
| Jun 17, 10:23 AM CDT | Heat Advisory | JAN | Adams, Claiborne, Copiah, Covington, Forrest, Franklin and 17 more | 10 hr |
| Jun 17, 12:48 PM CDT | Special Weather Statement | JAN | Jones | 42 min |
| Jun 17, 12:53 PM CDT | Severe Thunderstorm Warning | JAN | Jones | 52 min |
| Jun 17, 1:31 PM CDT | Special Weather Statement | JAN | Clarke | 44 min |
| Jun 17, 1:34 PM CDT | Special Weather Statement | JAN | Lawrence | 41 min |
| Jun 17, 1:41 PM CDT | Severe Thunderstorm Warning | JAN | Adams, Jefferson | 49 min |
| Jun 17, 1:43 PM CDT | Severe Thunderstorm Warning | JAN | Scott | 62 min |
| Jun 17, 1:51 PM CDT | Severe Thunderstorm Warning | JAN | Clarke | 39 min |
| Jun 17, 2:19 PM CDT | Severe Thunderstorm Warning | JAN | Adams, Franklin | 56 min |
| Jun 17, 2:22 PM CDT | Special Weather Statement | JAN | Covington, Jones | 53 min |
| Jun 17, 2:33 PM CDT | Severe Thunderstorm Warning | JAN | Jasper, Smith | 57 min |
| Jun 17, 2:49 PM CDT | Severe Thunderstorm Warning | JAN | Covington, Jones | 56 min |
| Jun 17, 3:43 PM CDT | Special Weather Statement | JAN | Jones | 62 min |
| Jun 17, 4:01 PM CDT | Flash Flood Warning | JAN | Jasper, Jones, Smith | 3 hr |
| Jun 17, 5:13 PM CDT | Special Weather Statement | JAN | Covington, Jones | 32 min |
| Jun 17, 5:57 PM CDT | Special Weather Statement | JAN | Covington | 63 min |
| Jun 17, 5:46 PM CDT | Special Weather Statement | JAN | Concordia | 59 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 2023Severe Thunderstorm Warnings in Louisiana, 2023Every severe thunderstorm warning in 2023
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.